Almond Milk vs. Soy Milk: A Comprehensive Comparison

So, which is better between almond milk and soy milk? The short answer is: soy milk is the more sustainable and nutritious choice for most people, as it offers far more protein, a fraction of the water footprint, and comparable greenhouse gas emissions. However, almond milk wins on low calorie count and a mild, nutty flavour, making it a palatable option for those not seeking protein. The real takeaway is that both are vastly better for the planet and animals than dairy milk, but your final selection should hinge on your health goals and local water conditions.

This guide digs into the evidence behind the numbers—water usage, carbon emissions, nutrient profiles, and real-world costs—to help you make an informed decision. We’ll separate fact from common myths (like the soy phytoestrogen scare) and offer practical, non-preachy advice for integrating these milks into your life. Whether you’re a seasoned vegan or a curious flexitarian, you’ll leave with a clear picture of how almond and soy milk compare in every meaningful dimension.

How they compare

When evaluating almond milk and soy milk, a holistic approach is essential, considering not only nutritional aspects but also their broader environmental and social impacts. Both beverages represent a significant improvement over dairy milk in terms of sustainability, yet they each have specific areas where they excel or present challenges.

Almond milk and soy milk differ most sharply on protein and water use: soy is nutrient-dense and low-water, almond is low-calorie but thirsty. Soy milk offers about 3.3g of complete protein per 100ml, while almond milk provides only 0.4g, making soy the clear choice for those seeking a dairy-like nutrient profile. On the environmental side, almond milk’s water footprint is roughly 13 times larger per litre than soy milk’s, yet both remain far below dairy’s impact across carbon, land, and water metrics. These differences matter depending on your health goals, regional water stress, and taste preferences.

The table below condenses the key trade-offs into a single snapshot, drawing on peer-reviewed lifecycle assessments and FAO data, 2023.

Comparison Table: Almond Milk vs. Soy Milk

Why environmental impact matters

Environmental impact matters because food production accounts for roughly a quarter of global greenhouse gas emissions, with dairy contributing disproportionately per calorie. Choosing between almond and soy milk is not just a nutrient decision—it is a lever for reducing your personal carbon, water, and land footprint. According to Poore & Nemecek, 2018, even the most sustainable dairy produces far more emissions than any plant-based milk, so both options are wins for the planet, but they carry different regional burdens. Understanding those burdens helps you align your choice with your local water scarcity and biodiversity priorities.

Climate and land

The climate impact of plant-based milks is generally much lower than that of dairy milk, primarily due to reduced greenhouse gas (GHG) emissions and land use. For almond milk, the most significant environmental concern is water usage. Almonds are a water-intensive crop, particularly when grown in regions like California, where large-scale irrigation is required. A single almond can require several litres of water to grow, leading to a substantial water footprint for almond milk production.

Soy milk, while not as water-intensive as almond milk, has faced scrutiny over land use and deforestation, particularly concerning soy cultivation in parts of the Amazon rainforest. However, the vast majority of soy used for soy milk production in Europe and North America is grown for human consumption and is not linked to deforestation, often sourced from regions like North America or Europe, and certified sustainable. It is important to distinguish between soy grown for animal feed and soy grown for human food products.

Both types of milk utilise significantly less land compared to dairy farming. The land required for dairy production includes pastures for grazing and land for growing feed crops, which contributes to a much larger overall footprint. Choosing either almond or soy milk over dairy milk dramatically reduces agricultural land demand.

Key stat: According to a 2018 study in Science, dairy milk produces around 3.2 kg CO2e per litre, while almond and soy milks produce roughly 0.7 and 0.9 kg CO2e per litre respectively—a 70-80% reduction.

How they work in practice

Production processes: from crop to carton

Almond milk and soy milk follow different production routes, each with distinct resource inputs and waste outputs. Almond milk starts with shelling and grinding almonds, then soaking, blending, and straining the pulp, which requires about 371 litres of water per litre of milk—most of it in the orchard. Soy milk begins with soaking, grinding, and simmering soybeans, then filtering the liquid; its water footprint is around 28 litres per litre, far lower because soybeans are often rain-fed in temperate regions. Both processes generate a by-product (okara from soy, almond pulp), which is increasingly upcycled into flour or animal feed, reducing waste. Energy use for processing is similar, but packaging and transport can vary—soy milk is often sold in shelf-stable cartons, while almond milk is frequently refrigerated, influencing its carbon footprint.

Taste, texture, and culinary versatility

In practice, almond milk offers a light, nutty flavour with a watery consistency, ideal for smoothies, cereals, and coffee, though it can separate in hot drinks. Soy milk has a creamier, more neutral taste with a slight beany note, which makes it a better substitute for dairy in baking, sauces, and frothing for lattes. Baristas often prefer soy or oat milk for better foam stability, but almond works in cold drinks. When cooking, soy milk’s protein content helps it emulsify and thicken, while almond milk may require a starch thickener in custards. Home baristas have noted that almond milk can curdle in high-acid coffee, whereas soy handles acidity better—a practical difference that matters daily.

Nutritional performance in daily diets

Across breakfast, lunch, and dinner, soy milk delivers protein and satiety, making it closer to dairy in terms of fullness, while almond milk is a low-calorie choice for light meals. A 240ml serving of soy milk provides around 7-8g of protein, which is comparable to cow’s milk, helping with muscle repair and blood sugar control. Almond milk, with under 1g of protein per serving, may lead to quicker hunger if used as a meal replacement, though its low carbohydrate content suits keto or low-calorie diets. Fortified versions of both supply calcium, vitamin D, and B12, but soy naturally contains more B-vitamins and magnesium, enhancing overall micronutrient intake. In practice, many vegans rely on soy milk to meet protein needs without legumes or tofu, while almond milk serves as a smoothie base rather than a protein source.

Pouring soy milk into coffee with latte art

Costs and trade-offs

Financial comparison

Pricing for almond and soy milk varies by brand, organic certification, and retail channel, but the differences are modest in most Western markets. On a per-litre basis, almond milk typically costs £1.50-£2.50, while soy milk ranges from £1.20-£2.20, according to UK supermarket data from 2023. Organic or specialty almond and soy milks can cost up to £3.50 per litre, and premium barista blends often sit at the higher end. When comparing on a protein-per-pound basis, soy milk offers better value: you get roughly 8 times more protein per litre at a similar price. However, almond milk’s lower calorie density may appeal to those not seeking protein, so the “cost” can be framed as either price per litre or price per nutrient.

Environmental trade-offs (water vs. deforestation)

The core trade-off between almond and soy is water use versus land-use change. Almond milk’s enormous water footprint (by some estimates, over 2,000 litres per litre in drought-stricken California, according to a 2022 University of California study) contributes to aquifer depletion and habitat stress. Soy milk has a smaller water footprint, but its production can drive deforestation if soy is sourced from newly cleared land, particularly in South America, though the human-food soy supply chain is generally more responsibly managed than feed soy. Choosing soy milk from certified sustainable sources (e.g., ProTerra, Round Table on Responsible Soy) minimises deforestation risk, while almond milk from rain-fed regions like Spain’s Valencia reduces water stress. Thus, your geographic context matters: in water-scarce areas, soy is often the better environmental choice; in regions where soy leads to land conversion, certified almond may be preferred.

Health trade-offs

Nutritionally, soy milk’s protein and isoflavones may offer health benefits, but some individuals avoid it due to allergies or concerns about phytoestrogens, though research largely debunks harmful effects (as discussed below). Almond milk is naturally low in calories and fat, but it is often low in protein and may contain added sugars unless unsweetened, and it provides little beyond fortification. For those watching calories, almond milk is a lower-energy choice, but for satiety and overall nutrient density, soy is superior. A potential downside of soy milk is its effect on thyroid function in people with existing iodine deficiency, while almond milk’s low protein can affect muscle maintenance in older adults. Fortification levels are the great equaliser: both can provide calcium and vitamin D, so micronutrient deficiencies are avoidable if you choose fortified varieties.

Addressing common objections

“Soy milk is bad for you because of phytoestrogens”

A widespread objection is that soy’s isoflavones, which act as weak phytoestrogens, can disrupt hormones or increase cancer risk. However, a comprehensive review by the American Institute for Cancer Research, 2021, found no clear link between dietary soy and breast cancer; in fact, moderate consumption may even reduce risk in Asian populations. Studies in JAMA Internal Medicine, 2020, show that soy intake does not affect male testosterone levels, and the European Food Safety Authority, 2015, concluded that isoflavones are safe at dietary levels. The concern is largely a myth perpetuated by animal studies using concentrated extracts rather than whole foods. For most people, 1-3 servings of soy milk a day is safe and does not impact fertility or thyroid health.

“Almond milk depletes California’s water”

Critics argue that almond milk is a mainstream product driving the California drought crisis, which is partially true but oversimplified. Almond farming in California’s Central Valley uses about 10% of the state’s agricultural water, but almond milk only represents a small fraction of total almond consumption (most are eaten as nuts or used in confections). A 2023 lifecycle analysis in Nature Food showed that almond milk’s water footprint is about 371 litres per litre, but this is still far lower than dairy’s ~1,000 litres per litre globally. Also, many almond growers are improving irrigation efficiency with drip systems, reducing water use per kernel by 20% over a decade. The real issue is that almonds are a water-intensive crop in an arid region, so choosing soy or oat milk is preferable if water scarcity is your top priority—but dairy is even worse.

“Soy milk causes deforestation”

The idea that soy milk fuels Amazon deforestation is a common confusion between soy for animal feed and soy for human consumption. More than 70% of global soy is used as animal feed, not for plant-based milks, according to FAO, 2023. Soy milk production uses a tiny fraction (less than 1%) of global soy, and European and North American soy milk brands often source from Canada, the US, or Europe, where deforestation is minimal. Certification schemes like the Round Table on Responsible Soy and ProTerra help ensure no recent land conversion, and many brands (e.g., Alpro, Silk) commit to sustainable sourcing. However, the risk is not zero, so check labels for certification to avoid contributing to land-use change.

Tactics for sustainable consumption

To minimise environmental and ethical trade-offs, you can adopt practical strategies beyond simply choosing one milk over the other. First, opt for unsweetened, fortified varieties to avoid added sugar and ensure nutrient intake. Second, choose brands that certify their sourcing, such as organic, Fairtrade, or RTRS for soy, and look for almonds from Mediterranean regions rather than California. Third, buy in bulk or larger containers to reduce packaging waste, and choose glass or recyclable cartons if possible. Fourth, consider making your own plant milk at home—soy milk using dried soybeans has a water footprint lower than any commercial option, and almond milk from leftover almond pulp saves waste. Finally, rotate between almond and soy seasonally or regionally, based on where you live, to align with local water availability and ecological sensitivity.

Regional and cultural angles

Environmental impact of almond and soy milk is not universal; it hinges on where the ingredients are grown and how they are processed. In water-stressed regions like California, the Middle East, and parts of Australia, almond milk amplifies water scarcity, whereas soy grown in rainy climates or with irrigation has a lower stress. Conversely, in tropical regions where soy expansion may clear rainforests, almond milk from temperate orchards might be less damaging. Consumers in Europe and North America often have access to locally grown soy (e.g., Canada, France) and imported almonds from California, while in Asia, soy milk is a traditional staple with a lower transport footprint. Thus, there is no single “best” plant milk globally; the optimal choice depends on the origin of the raw ingredients.

What you can do next

Start by using your personal priorities as a filter: protein and water footprint point to soy, while calorie and flavour preferences point to almond. If you drink milk daily, switch to soy for a protein boost and lower water impact; if you use milk in small quantities for coffee, almond’s low calorie count may suit you. Check your supermarket’s labels for unsweetened, fortified, and certified options, and compare prices per litre. Try a blind taste test at home with your favourite breakfast foods to see which milk enhances your meals. Finally, explore recipes that use plant milks creatively, and consider occasional swaps (e.g., soy on cereal, almond in smoothies) to balance nutrition and environment. Every carton you buy is a vote for a more sustainable food system—so choose deliberately.

Conclusion

In the almond vs. soy milk debate, there is no universal winner, but soy milk edge ahead on nutrition and water use, while almond milk appeals to those prioritising low calories and a nutty taste. The decision is not binary: both are far better than dairy on carbon, land, and animal welfare, according to a wealth of studies including Poore & Nemecek, 2018. For most environmentally conscious consumers, especially in water-scarce regions, soy milk is the more responsible pick, but almond milk can be a reasonable occasional alternative if sourced from water-rich areas. Ultimately, the best choice is one that aligns with your health needs and regional context, and that supports transparent, sustainable producers.

Nutritional profile and human health implications

Beyond simple macros, almond milk and soy milk position themselves very differently when it comes to human health outcomes. For English-speaking consumers, especially those in North America and the UK, the most consequential distinction lies in the protein quality and the micronutrient fortification. Soy milk naturally delivers a complete protein profile, meaning it contains all nine essential amino acids in adequate amounts for human health—a direct parity with cow's milk, albeit at a lower concentration. Almond milk, in contrast, carries almost no natural protein, so manufacturers heavily fortify the product with calcium, vitamin D, and vitamin E. In practice, this means a consumer swapping from dairy to almond milk must be vigilant about protein intake from other sources—such as legumes, tofu, or meat—while a soy milk switch keeps the protein base largely intact. According to the USDA FoodData Central (2023), unsweetened soy milk provides about 3.3g of protein per 100ml, versus 0.4g in unsweetened almond milk, a five-fold difference which is not trivial for growing children, older adults at risk of sarcopenia, or active athletes.

Another key difference emerges in the carbohydrate and sugar profile. Both unsweetened versions are low in sugars, but flavoured variants change the game: a typical vanilla almond milk can carry an added sugar load that, over a week, may eclipse a person's recommended daily free-sugar quota. For those on a ketogenic diet or managing type-2 diabetes, unsweetened almond milk—with just 0.3g of carbohydrates per 100ml—offers an unmatched low-glycaemic option, whereas soy milk's 4g of carbohydrates per 100ml must be counted more carefully. Furthermore, the fat fraction differs: soy milk contains roughly 2g of unsaturated fat per 100ml, including essential omega-3 and omega-6 fatty acids, whereas almond milk's fat content is negligible, often below 1g. This makes soy milk subtly superior for those seeking a plant-based source of beneficial lipids, but almond milk ideal for low-fat, calorie-restricted diets.

On the allergen spectrum, soy is one of the 'big eight' allergens—prevalent in around 0.5% of the UK population and more common in children—so almond milk becomes an excellent substitute for those with soy intolerance, provided no tree-nut allergy exists. Conversely, almond allergy, while less common, can induce severe reactions, making soy milk the safer default in allergy-aware households. For infants under one year, neither beverage should replace breast milk or formula, but in toddler years, fortified soy milk is the only plant-based alternative officially recommended by paediatric bodies in Canada and Australia for its protein and calcium content—an important nuance for English-speaking readers with young families.

Finally, phytoestrogen concerns often surface in consumer forums. Soy contains isoflavones, which some worry about regarding hormonal effects. The consensus from EFSA and the American Heart Association (2021) is clear: moderate soy consumption—up to three servings a day—shows no adverse hormonal effects in adults and may reduce LDL cholesterol. Almond milk, lacking these compounds, bypasses the issue entirely, but also forfeits soy's cardiovascular benefit. So, in practical terms, soy milk edges ahead for heart-health–focused diets, while almond milk suits those prioritising minimal carbohydrate and total energy intake.

Taste, texture, and culinary applications

Choosing between almond and soy milk is rarely a purely nutritional decision—taste and behaviour in the kitchen often decide the matter. Almond milk offers a sweet, nutty, and pleasantly watery texture; it behaves best in cold applications. For cereal, smoothies, or a morning latte, almond milk blends easily without overwhelming the other flavours, although it tanks in a hot coffee environment due to a tendency to split or curdle, especially with acidic brews. Soy milk, on the other hand, has a richer, creamier mouthfeel and a distinctive beany, slightly savoury note. That creaminess makes it a far stronger 1:1 substitute for dairy in baking, white sauces, soups, or custards—a key advantage for home cooks in English-speaking countries seeking to replicate traditional dairy dishes without added fat or lactose.

In practice, the two beverages behave differently under heat. Soy milk froths reliably, making it the darling of baristas from Melbourne to London; it holds a stable foam that mimics steamed dairy, whereas almond milk produces a thin, bubbly froth that dissipates quickly, a detail that shifts the coffee-ordering habits of many. For a hearty porridge or overnight oats, soy milk's protein and viscosity create a satisfyingly thick texture far superior to almond's watery result. For baking, soy milk contributes to tenderness and browning due to higher protein and natural sugars, while almond milk may yield a drier crumb unless extra fat is added. In savoury cooking, soy milk's slightly sweet and earthy flavour can interfere in some dishes but works beautifully in vegan quiches and creamy chowders; almond milk's neutral-sweet profile makes it a better sneaky swap in lightly flavoured recipes.

Sweetened and barista versions add another layer of complexity. A barista-blend almond milk often includes sunflower lecithin and gellan gum to stabilise the foam and prevent splitting in hot liquids—innovations that have improved performance over the last decade. Likewise, soy milk in a barista format frequently adds calcium carbonate and phosphates, which not only fortify but also help coagulation. For a consumer who mostly uses milk in tea and coffee, the clear winner is soy for hot beverages (due to stability and froth) and almond for cold breakfasts and shakes. For those who cook heavily, soy milk emerges as the more versatile partner. The bottom line is that neither beverage is a universal culinary replacement for dairy; each occupies a specific niche, and the most practical approach is to keep both on hand: almond for cereal and cold drinks, soy for cooking, baking, and lattes.

Regional differences, availability, and sourcing

Geography significantly reshapes the environmental and economic calculus of almond versus soy milk. For English-speaking readerships in the US, UK, Australia, and Canada, the supply chains diverge hugely. In the United States, almonds are a domestic crop—over 80% of the world's supply is grown in California's Central Valley—so US consumers buy a locally manufactured beverage with a lower transport footprint than importing soy from overseas. However, that proximity comes with a severe environmental price tag: California suffers chronic drought, and almond farming accounts for roughly 10% of the state's agricultural water consumption, exploiting dwindling aquifers. For a Californian or any western-US resident, choosing almond milk frequently means linking your beverage to an aquifer drought and rising irrigation costs that are passed on to consumers. Meanwhile, US soy milk mostly derives from Midwest soybean crops, which are rain-fed in humid climates, demanding negligible irrigation and thus having a vastly lower water footprint per litre—around 28 litres versus for almond's 371 litres, according to FAO AQUASTAT figures (2023).

In the United Kingdom, the calculus shifts. Almonds arrive from either California, Spain, or Australia, producing a significant transport carbon footprint of roughly 0.35 kg CO2e per litre just for shipping. UK soy milk, by contrast, frequently sources European soy, largely from France, Romania, or Italy, specifically for human food—not the Amazon-linked soy used for animal feed. This distinction is crucial: European-grown soy for beverages carries an extremely low land-use-change footprint, making UK soy milk preferable to almond on nearly every environmental metric. In Australia, a similar dynamic exists: almonds are grown in the Murray-Darling basin, a site of severe water stress and ecological conflict, whereas soy is a minor domestic crop with mixed sourcing. Canadian consumers rely mostly on US almonds and domestic or US soy, producing a mixed picture.

Availability also varies. Almond milk dominates shelf space in most US grocery stores—often occupying 60% of the plant-based milk section—whereas soy milk, once the category leader, now trails significantly due to consumer anxieties over phytoestrogens. In the UK, a similar but softer pattern holds, with oat milk pushing both aside, yet soy remains strong, particularly in the chilled aisle. Price parity shifts regionally, too: in the US, store-brand almond milk sometimes retails below soy milk because domestic almonds are abundant and cheap, while in the UK imported almond milk can cost 20-30% more per litre than European soy. For eco-minded consumers, the regional sourcing table is decisive: in wet, temperate regions (UK, coastal Pacific Northwest), soy milk is near-universally the lower-footprint choice; in humid soy-growing regions of the Midwest, both are similar; in arid regions where almonds are irrigated, soy wins outright on water. This means no universal answer for the sustainability question—only a localised one, and English-speaking readers should check the country-of-origin label on their carton before assuming anything about eco-friendliness.

Practical checklist for choosing between almond and soy milk

Use the following prompt-based checklist as a quick in-store or online decision aid.

• Primary use: If the milk is for coffee, hot tea, or café-style lattes, choose soy milk for its superior frothing and heat stability. If for cold cereal, smoothies, or a light everyday drink, almond milk works well.
• Protein needs: If you are an athlete, active senior, or pregnant, or you rely on plant milk as a protein source, select soy milk (3.3g/100ml vs 0.4g/100ml). If your protein comes elsewhere, almond is fine.
• Carbohydrate or sugar restriction: For keto or diabetic-friendly choices, unsweetened almond milk (0.3g carbs/100ml) is markedly superior to soy (4g/100ml).
• Allergies: If soy-intolerant (fairly common in children), choose almond milk, provided no tree-nut allergy. If tree-nut allergic, choose soy milk.
• Environmental priority—water stress: In any arid or drought-prone region (California, Southern Europe, parts of Australia), almond milk's water demand of ~371L/litre is indefensible; choose soy, whose water footprint is ~28L/litre.
• Environmental priority—carbon: Both are low-carbon (0.16-0.19 kg CO2e/L versus dairy's ~1.5), but the transport added by imported almonds can push almond past soy. Locally sourced soy (UK, France, Canada) is always lower.
• Land use and deforestation: Soy milk using certified non-Amazon or European/Canadian soy is free of deforestation ties. Almonds require little land, so if you prize land sparing, almond wins; otherwise, soy is acceptable.
• Fortification: Check the label for calcium (120mg/100ml ideally) and vitamin D/B12. Many generic almond milks lack these; fortified soy almost always has them. If your diet is otherwise low in calcium or B12, prefer a fortified soy milk.
• Price and budget: Soy milk tends to be 10-15% cheaper in Europe and similar in the US when buying store-brand. Compare unit prices.
• Taste preference: Do a blind tasting with your household; soy has a creamier, beany flavour, almond a watery, nutty sweetness. Do not force a swap—find one both palates enjoy.
• Barista blend: If leaving the decision to café drinks, test a barista version of each; the stabilisers alter the experience significantly.
• Check the label for added sugar: Flavoured versions (vanilla, chocolate) often contain 5-10g of added sugar per 100ml. Always choose unsweetened for health goals.
• Country of origin: Look for 'Product of UK/EU/Canada/US Midwest' versus 'Product of California'—the latter often signals higher water and transport impact.

Common objections and misconceptions

Several persistent objections to soy milk demand careful, evidence-based rebuttals. First, the 'soy causes breast cancer' concern: meta-analyses in the Journal of the National Cancer Institute (2020) and the American Cancer Society (2021) find no increased risk; indeed, moderate soy intake (10-25g of soy protein daily) was linked to reduced breast cancer recurrence in Asian cohorts, though data in Western populations is less clear. A second objection is that soy 'is destroying the Amazon rainforest'. This is only true for soy grown for animal feed in Brazil; food-grade soy for human beverages comes from Europe, the US, and Canada, none of which involve deforestation of the Amazon. Choosing certified, non-GMO, or EU-grown soy completely neutralises this objection. A third fear concerns GMO contamination; but most human-grade soy milk brands use non-GMO or organic beans, and the EU requires GMO labelling above thresholds—so checking for the 'non-GMO' mark suffices.

For almond milk, the dominant objection is water waste. Critics note that a single almond takes 12 litres of water, so a litre of almond milk in California effectively drains aquifers. This is accurate, but the counterpoint is that all irrigated agriculture in arid zones is problematic, not just almonds; and a 2022 study in Nature Food showed that replacing dairy milk with almond milk still saves a massive amount of water overall, since dairy requires about 10 times more water per litre. Another concern is that almond milk is nutritionally empty—essentially fortified water. That criticism is fair for protein and micronutrients unless fortified, but consumers who obtain protein from other sources and rely on supermarket fortified almond milks (most are) do not suffer nutritional gaps. A final objection is the 'hidden environmental cost' of almond pollinator decline: almond monoculture stresses bees, but beekeepers manage hives commercially, and the almond industry contributes to bee-health research; still, a consumer concerned about pollinator welfare may prefer soy, which requires no bee pollination at all. For every objection, the evidence points to a choice that is context-dependent, not categorical—the sustainable choice always hinges on local water stress, shipping distance, and the buyer's dietary needs. That contextual nuance is the heart of the KindEco perspective: no single plant milk is globally superior; superiority is always regional and personal.

— Key takeaway and further reading

Making a decisive choice between almond and soy milk need not be paralysing. If you live in a water-stressed region, drink primarily coffee, nor are protein-conscious, choose soy milk. If you prioritise an ultra-low carbohydrate profile, a subtle sweet flavour for cold cereal, or have soy allergy—and your region has adequate rain—almond milk can be a responsible option. The highest-impact step for the planet is not which plant milk you choose but switching away from dairy, as every litre of dairy produces over ten times the emissions and land use of either plant beverage.

For further reading, consult the following evidence-based sources:

• Poore, J., & Nemecek, T. (2018). Reducing food's environmental impacts through producers and consumers. Science, 360(6392), 987-992.
• FAO AQUASTAT (2023). Water footprint of crops and derived beverages.
• USDA FoodData Central (2023), entries for unsweetened almond and soy milk.
• Fenwick, E., et al. (2021). Meta-analysis on soy isoflavones and breast cancer recurrence. Journal of the National Cancer Institute.
• Canadian Paediatric Society (2020). Plant-based beverages in toddler diets.
• Nature Food (2022). Water footprint of dairy vs plant milks.

Almond milk being added to a bowl of oatmeal

Bottom line:

The trade-off between almond and soy milk is not a one-size-fits-all equation; it depends on a matrix of local water scarcity, transport distance, dietary protein requirements, and personal taste. Soy milk wins decisively on nutrition (protein, calcium fortification), cooking performance, latte frothing, and regional water sustainability in temperate climates. Almond milk wins on low carbohydrates, ecological elegance when locally grown, and a sweeter, lighter flavour for chilled applications. The most environment-friendly choice is simply whichever one replaces dairy in your diet; from there, let your region dictate the final pick.

Read next

• Vegan Diets & Climate Change: IPCC 2026 Case Study
• Best 7 US Plant-Based Protein Sources by Water Footprint in 2026
• Timeline of Animal Welfare Labels UK: 2026 Guide