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Food Science · 10 min read

Plant milks compared: oat, soya, almond, and dairy

Compare plant milks by protein, fortification, flavour and price rather than searching for one universally superior carton.
Oat, soya, almond and coconut drinks have different nutritional profiles. Soya usually contains more protein, while oat may suit taste and cooking preferences. What matters most is whether the product fits the person using it and is fortified where needed.
Check labels for calcium, vitamin D, iodine, added sugar and protein. Organic plant drinks are not always fortified. A splash in coffee has different nutritional importance from a drink used daily by a child.
Children under two and anyone avoiding dairy for allergy or nutritional reasons need individual guidance on a suitable main drink. For most adults, taste, price and a balanced overall diet can guide the choice.

Soya - protein and fortification

Unsweetened fortified soya drink usually provides more protein than other plant drinks and may be closest to cow's milk nutritionally, although products vary. It can work well in porridge, tea and sauces once you find a flavour you like.
Check for calcium, vitamin D, iodine and vitamin B12 fortification. Soya allergy needs avoidance, while people taking levothyroxine should follow their medicine instructions and ask a pharmacist if timing is unclear.
Choose unsweetened and fortified for regular use.
Compare protein per 100 ml with the dairy or plant drink it replaces.
Ask a pharmacist about levothyroxine timing if needed.

Oat - creamy, lower protein

Oat drinks are creamy and popular in coffee, but normally contain less protein than dairy or soya. Their carbohydrate content may also matter in an individual diabetes plan.
Barista and flavoured versions can contain added oil or sugar. Compare labels rather than assuming every carton is nutritionally identical.
Barista versions froth better - check sugar on flavoured lines.
Works in porridge meta-moments: oats with oats.
Own-brand oat is usually cheaper per litre than branded.

Almond and other nut milks

Almond and other nut drinks are often low in protein, despite being made from a protein-containing food. Coconut drinks vary in saturated fat, and rice drinks should not be given to children under five.
These drinks can suit taste and cooking preferences, but they should not be treated as a direct nutritional replacement without checking the label.
Almond - smoothies and light cereal, not main child drink alone.
Coconut drink - check saturated fat on label.
Rice milk - limited for young children per UK guidance.

Dairy still counts

Cow's milk provides protein, calcium, iodine and B vitamins for people who tolerate and choose it. Lactose-free milk retains the other nutritional features of dairy.
Organic production changes farming standards rather than the basic nutrient role. Own-brand milk remains a useful choice.
For young children, follow age-specific NHS guidance on the type of milk offered.
Lactose-free cow's milk is still dairy and is not suitable for milk allergy.
Iodine can be easy to overlook when dairy is removed.

Price per litre on the same shelf

Compare the unit price and fortification on own-brand and branded cartons. Long-life options may reduce waste when milk use is unpredictable.
Once opened, follow the storage and use-by instructions. A discounted product is poor value if it does not provide the nutrients you rely on or half the carton is thrown away.
Compare pence per litre - own-brand often wins.
Check fortification on discount lines, not all match.
UHT multi-buys - only if you use milk fast enough.

How to choose without overwhelm

For many adults, an unsweetened drink fortified with calcium and vitamin D is a practical starting point, with protein, iodine and vitamin B12 also worth checking. Taste and cooking performance matter because the best carton is one the household will finish.
Babies and young children, pregnancy, vegan diets, food allergy and osteoporosis risk can need tailored advice from a dietitian or clinician. Rice drinks should not be given to children under five because of their arsenic content.
Choose one everyday carton that fits the household's needs.
Read the back-of-pack fortification and protein information.
Seek individual advice for babies, young children, allergy or significant nutritional concerns.
Food Science
On this page
1
Soya - protein and fortification
2
Oat - creamy, lower protein
3
Almond and other nut milks
4
Dairy still counts
5
Price per litre on the same shelf
6
How to choose without overwhelm
At-a-glance (typical fortified)
Soya - higher protein, good all-rounder.
Oat - creamy, lower protein, popular in coffee.
Almond - low protein, light in smoothies.
Dairy - protein, iodine, calcium baseline.
Always read your carton - brands differ.
Quick wins
Fortified soya drinks usually provide more protein than oat, almond or rice drinks and may be closest to cow's milk nutritionally.
Fortification varies, so check calcium, vitamin D, iodine, vitamin B12 and protein on the actual carton.
Babies and young children need age-specific advice because plant drinks are not automatically suitable as a main drink.
Build a week around this advice
Healthy eating guide
Porridge benefits
Vitamin D on a budget
Open meal planner
Trust & sources
Written for Meal Pilot by Dr James, MBBS - a practising NHS GP in the United Kingdom. The information below reflects UK public-health guidance (including NHS Eatwell principles and SACN reference intakes). It is educational, not a personal prescription: always follow advice tailored to you by your own GP, practice nurse or registered dietitian.
Author
Dr James, MBBS
Reviewed by
Meal Pilot clinical evidence review
Last reviewed
2026-06-20
Sources
· SACN and COT. Assessment of the health benefits and risks of consuming plant-based drinks. 2023.
· SACN. Feeding young children aged 1 to 5 years. 2023.
· COT. Statement on the potential risks from arsenic in the diet of infants aged 0 to 12 months and children aged 1 to 5 years. 2016.
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