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Food & Nutrition
Soy milk vs almond milk
Soy and almond are the two plant milks most often recommended by dietitians and most often argued about online. They behave very differently: one is a complete protein source, the other is a light, low-calorie drink. This page separates the nutrition question from the sustainability question so you can pick per use case rather than picking a side.
Side by side
| Criterion | Soy milk | Almond milk |
|---|---|---|
| Protein | Comparable to cow's milk and a complete protein — the usual dietitian default for children and older adults. | Very low; almond milk is mostly water with a small amount of ground almond. |
| Calories | Moderate. | Low, which makes unsweetened almond popular for calorie control. |
| Water use | Modest freshwater demand. | The highest freshwater demand of the mainstream plant milks, concentrated in drought-exposed growing regions. |
| Allergens | Soy is a major allergen and a common early-childhood allergy. | Tree-nut allergen; unsuitable for many school and workplace settings. |
| Cooking | Sets in custards and béchamel and curdles less in hot savoury dishes. | Thin; better in cereal, smoothies and baking than in sauces. |
Questions people ask
- Does soy milk affect hormones?
- Human trials have not found that ordinary dietary soy intake changes testosterone or oestrogen in a clinically meaningful way. Major dietetic bodies treat soy foods as safe for all age groups.
- Which plant milk has the most protein?
- Soy and pea drinks lead by a wide margin. Almond, rice and oat are all low-protein unless the manufacturer has blended in a protein isolate.
Our reporting on this
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Related desks
More comparisons
This comparison weighs two options against the same criteria so the trade-off is visible instead of implied. We do not crown a universal winner: the better choice depends on what you are optimising for — emissions, animal welfare, nutrition, cost, availability or time — and those priorities differ legitimately between readers.
Everything below is drawn from our own reporting in this edition. Where the evidence is genuinely contested, the comparison says so rather than resolving it artificially, and the linked articles show the datasets behind each claim.
How we compare
Both sides are measured against identical criteria and, wherever possible, against figures from the same study or dataset — mixing sources with different system boundaries is the most common way comparisons mislead. Emissions are given per useful unit rather than per kilogram where that changes the ranking, welfare is assessed against the certification scheme actually in force, and nutrition is compared at realistic serving sizes.
What the comparison cannot settle
Local context decides several criteria. Water footprint depends on where a crop grows, not only on what it is. Availability, price and labelling rules vary by country. Personal nutrition needs vary by age, pregnancy, medication and medical history. Treat the comparison as a structured way to think, and check the criteria that are local to you.
Making the decision
Pick the two or three criteria that actually matter to you and ignore the rest — a comparison optimised for everything at once is optimised for nothing. If the two options are close on your priorities, the tiebreaker is usually whichever you will realistically keep doing, because sustained changes outperform theoretically optimal ones that get abandoned.
| Criterion | What we look at | Why it varies |
|---|---|---|
| Climate | Emissions per useful unit | System boundaries and geography |
| Land and water | Use per unit of output | Local rainfall and land quality |
| Animals | Welfare outcomes, not labels | Certification scheme in force |
| Nutrition | Realistic serving sizes | Individual needs and intake |
| Practicality | Cost, availability, effort | Country and household |
FAQ
- Why is there no overall winner?
- Because the criteria trade off against each other. An option that wins on emissions may lose on cost or availability, so a single ranking would hide the decision you are actually making. The comparison shows each criterion separately instead.
- Are the figures the same everywhere?
- No. Water use, emissions intensity, price and labelling rules all vary by country and by year. We give the region and date for every figure so you can judge whether it applies where you live.
- Is this comparison sponsored?
- No. VegEco accepts no payment for coverage and no brand placements. Comparisons are brand-neutral and explain what you can verify yourself on a label or in a public dataset.
- Should I use this for medical decisions?
- No. Nutrition sections describe general evidence, not individual advice. If you are pregnant, managing a condition or taking medication, discuss dietary changes with a qualified clinician.