Soya milk is the only mainstream plant milk with a protein content genuinely comparable to cow's milk — a distinction that has made it the default dairy-free choice for people who need to match dairy's nutritional profile rather than just its texture. Made by soaking, grinding and straining soybeans, it has been a staple of East Asian cuisine for over a thousand years and became Australia's first widely available plant milk decades before oat or almond milk existed. Commercial versions are fortified with calcium, B12 and vitamin D to approximate dairy milk's micronutrient profile, and soya milk is naturally rich in isoflavones — plant compounds studied for cardiovascular and menopausal health. Adjust the slider for your serving size.
🧮
Serving size calculator
Drag the slider — all values update instantly
Serving size:250ml
82Calories (kcal)
4.5Carbs (g)
8.2Protein (g)
1.5Fibre (g)
Advertisement
AdSense In-Content 336×280
📊 Full nutrition facts — per 100ml
Nutrient
Amount
% Daily value
Level
Calories
33 kcal
2%
Carbohydrates
1.8g
1%
Protein
3.3g
7%
Total fat
1.6g
—
Saturated fat
0.2g
—
GI
~34 — Low
—
Calcium (fortified)
120mg
12%
Vitamin B12 (fortified)
0.4µg
17%
Isoflavones
~9mg
—
Vitamin D (fortified)
1.0µg
5%
Potassium
140mg
3%
Iron
0.6mg
5%
Based on Australian NRV. Source: FSANZ Australian Food Composition Database.
📈 Glycaemic index (GI)
34
Glycaemic IndexLow GISoya milk has a GI of approximately 34 — low. Unlike most plant milks, soya milk's relatively high protein content (comparable to cow's milk) slows carbohydrate absorption significantly, keeping the glycaemic response modest despite its natural sugar content. Unsweetened varieties have an even lower effective GI than sweetened versions.
0 · Low (<55)Medium (56–69)High (70+) · 100
💊 Key vitamins & minerals
Protein
3.3g/100ml
Closest plant milk to dairy protein
Isoflavones
~9mg/100ml
Cardiovascular research interest
Calcium (fortified)
120mg
12% RDI per 100ml
Vitamin B12
0.4µg
17% RDI per 100ml
GI
~34 — Low
Lower than oat milk
Saturated fat
0.2g
Very low
✅ Health benefits
💪
Protein parity with dairy — the only plant milk that matches
Soya milk provides 3.3g of protein per 100ml — within range of cow's milk (3.2g) and far ahead of oat milk (1.0g) or almond milk (0.5g). This is because soybeans are one of the few plant foods that provide a complete protein profile with all nine essential amino acids in useful proportions. For people relying on plant milk as a meaningful protein source — children, athletes, older adults — soya milk is the only plant-based option that can genuinely substitute for dairy's protein contribution rather than just its texture.
🌿
Isoflavones — plant compounds studied for cardiovascular and hormonal health
Soybeans are the richest dietary source of isoflavones (genistein and daidzein), plant compounds that weakly bind oestrogen receptors and have been studied extensively for cardiovascular health, bone density and menopausal symptom relief. Long-term population studies in East Asian countries with high soy intake show associations with lower rates of certain hormone-related cancers, though causation in Western dietary contexts remains debated. The European Food Safety Authority has approved health claims relating to soy protein and blood cholesterol maintenance.
❤️
Cholesterol-lowering soy protein — an approved health claim
Soy protein has a well-established, regulator-approved association with LDL cholesterol reduction. Consuming approximately 25g of soy protein per day (roughly 750ml of soya milk) as part of a diet low in saturated fat has been shown in clinical trials to modestly reduce LDL cholesterol. This is one of the few plant-milk health claims with strong regulatory backing rather than marketing extrapolation.
🩺
Naturally very low in saturated fat — heart-healthy fat profile
Soya milk contains just 0.2g of saturated fat per 100ml — even lower than most other plant milks and dramatically below full-cream cow's milk (2.1g). Its fat is predominantly polyunsaturated, including alpha-linolenic acid (a plant omega-3). Combined with zero cholesterol and the cholesterol-lowering effect of soy protein itself, soya milk has one of the most favourable cardiovascular fat profiles of any milk alternative.
Advertisement
AdSense 728×90
⚠️ Who should limit or avoid
🥜
Soy allergy — one of Australia's most common childhood allergies
Soy is one of the ten priority food allergens under Australian food labelling law and one of the most common allergies in young children, though many children outgrow it. Soy allergy is an immune reaction distinct from lactose intolerance and requires strict avoidance of all soy-containing products, not just soya milk. Always check labels — soy protein appears in many processed foods beyond obvious soy products.
💊
Thyroid medication timing — isoflavones can affect absorption
Soy isoflavones can interfere with the absorption of thyroid hormone replacement medication (levothyroxine) if consumed at the same time. This is a timing issue, not a contraindication — people on thyroid medication are generally advised to take their medication at least 30–60 minutes before consuming soya milk or other soy products, and to maintain consistent soy intake so medication dosing remains stable.
🍼
Unfortified soya milk lacks meaningful calcium
Like other plant milks, soya milk naturally contains very little calcium — commercial fortification brings it to a level comparable to dairy milk, but homemade or unfortified soya milk does not. Always check the label for added calcium (aim for ≥100mg per 100ml) if using soya milk as a primary calcium source, particularly for children or during pregnancy.
✅ For most healthy adults without soy allergy, soya milk is the plant milk most functionally similar to dairy — matching cow's milk on protein while adding isoflavones and a favourable fat profile. Always choose fortified, unsweetened versions for the closest nutritional match to dairy.
⚕️ General nutritional information only — not a substitute for professional medical or dietary advice.
🛒 How to select & buy soya milk
1
Always choose fortified and unsweetened
Fortified: look for added calcium (≥100mg/100ml), B12 and vitamin D on the label — these bring soya milk to near-parity with dairy milk's micronutrient profile. Unfortified soya milk (some organic or minimally processed brands) has protein and isoflavones but negligible calcium. Unsweetened: plain soya milk has only naturally occurring sugars (~0.7g/100ml); sweetened and flavoured versions can add 4–6g of sugar per 100ml, significantly changing the nutritional profile.
2
Regular vs barista soya milk
Regular soya milk works well for drinking, cereal and most cooking. Barista soya milk formulations (higher protein concentration, added stabilisers) are optimised for steaming and microfoam — useful if making coffee at home. Soya milk was historically one of the better plant milks for coffee before oat milk's rise, due to its protein content supporting foam structure.
3
Reading the soybean sourcing
Non-GM certified: some Australian brands specifically source non-genetically-modified soybeans and label accordingly, though GM soy is rigorously safety-assessed by FSANZ and permitted in Australia. Australian-grown: a small proportion of soybeans used in Australian soya milk are grown domestically (mostly northern NSW and Queensland); most is imported. Organic: certified organic soya milk avoids synthetic pesticide residues in the growing process.
🇦🇺 Australian tip: Sanitarium's So Good was Australia's first mainstream soya milk, launched in 1983, and remains one of the most widely stocked brands alongside Vitasoy (Hong Kong-founded, with Australian manufacturing) and Bonsoy (a premium Japanese-style brand popular in Melbourne cafés for its rich flavour and steaming performance). Soya milk is available at every major supermarket from $1.80–4 per litre. Australia's small domestic soybean industry is concentrated around the Liverpool Plains region of NSW and parts of southern Queensland, though the majority of soybeans used in local soya milk production are imported, chiefly from the US and Canada.
🧊 Storage tips & shelf life
Refrigerator (opened)
7–10 days
Sealed, below 4°C, shake before use
Shake soya milk before each use as some natural separation occurs. Keep refrigerated after opening and use within 7–10 days. A sour smell or thick, curdled texture indicates spoilage — soya milk should pour smoothly and smell mild and slightly nutty.
📦
Pantry (UHT, unopened)
6–12 months
Cool dark place; refrigerate after opening
UHT soya milk in Tetra Pak cartons is shelf-stable unopened for many months — check the printed best-before date. Once opened, refrigerate immediately and treat as fresh, using within 7–10 days.
Soya milk has been made across East Asia for well over a thousand years, with written references to soybean-based drinks appearing in Chinese texts from at least the Song dynasty (960–1279 CE), and likely predating this by centuries as an informal byproduct of tofu-making. Traditional production — soaking dried soybeans, grinding them with water, then straining and boiling the resulting liquid — remains essentially unchanged today, whether in a small Chinese soy milk shop or a modern commercial dairy-alternative facility. Soya milk was long a breakfast staple across China, Japan, Korea, Vietnam and Thailand, typically drunk warm and unsweetened or lightly sweetened, often alongside fried dough sticks or rice-based dishes. Its introduction to Western markets in the 20th century was driven partly by vegetarian and health-food movements and partly by post-war Asian immigration establishing soy foods in mainstream Western grocery availability.
Sanitarium — the Seventh-day Adventist company also known for Weet-Bix — launched So Good soya milk in Australia in 1983, making it the country's first mainstream commercially available plant milk, roughly three decades before oat and almond milk became widespread. This early-mover position was rooted in the Adventist Church's historical promotion of plant-based eating for health reasons, dating back to the company's founding philosophy in the late 19th century. Soya milk therefore occupied a unique position in the Australian market for many years: the default (and often only) plant milk on supermarket shelves and café menus well into the 2000s. Its market share has been overtaken by oat milk since the mid-2010s, driven partly by barista performance and partly by some consumers' wariness of soy's phytoestrogen content — a concern not strongly supported by the clinical evidence but persistent in popular perception. Soya milk nonetheless remains a significant and well-established category in Australian supermarkets.
Soya milk has been made in China for over a thousand years — likely originating as a byproduct of tofu production
The earliest clear textual references to soy milk-like drinks appear in Chinese sources from the Song dynasty (960–1279 CE), though food historians believe the practice is considerably older, arising naturally alongside tofu-making — since tofu is made by curdling the same soaked-and-ground soybean liquid that is soya milk. Traditional Chinese soy milk shops (doujiang) still operate on largely unchanged methods: soybeans are soaked overnight, ground with water, strained through cloth, then boiled — the same three-step process used industrially today. Doujiang remains a common Chinese breakfast drink, traditionally paired with youtiao (fried dough sticks).
🇦🇺
2
Sanitarium launched Australia's first mainstream soya milk in 1983 — nearly 30 years before oat milk existed as a commercial product
So Good, launched by Sanitarium in 1983, predates Oatly's founding (1994) by over a decade and predates oat milk's mainstream Australian availability by roughly three decades. For most of that period, soya milk was the default and often sole plant milk available in Australian supermarkets and cafés — a position it held largely unchallenged until soy-alternative concerns and oat milk's barista advantages shifted market share from the mid-2010s onward. Sanitarium's early adoption reflects the Seventh-day Adventist Church's long-standing promotion of plant-based diets, a philosophy embedded in the company since its founding in 1898.
🔬
3
Soy protein's cholesterol-lowering effect is one of the few plant-milk health claims with genuine regulatory approval, not just marketing
Unlike many plant-milk health claims that extrapolate loosely from preliminary research, the soy-cholesterol connection has been formally assessed and approved by food regulators including the European Food Safety Authority, which permits the claim that soy protein contributes to the maintenance of normal blood cholesterol levels at an intake of 25g of soy protein per day. This threshold is achievable through soya milk combined with other soy foods (tofu, edamame, tempeh) as part of a diet already low in saturated fat — soya milk alone at typical serving sizes provides a meaningful but partial contribution.
🧬
4
Isoflavones in soy are structurally similar to human oestrogen but bind receptors far more weakly — a distinction often lost in popular discussion
Soy isoflavones (primarily genistein and daidzein) are phytoestrogens — plant compounds with a chemical structure similar enough to human oestradiol that they can bind oestrogen receptors, but with binding affinity roughly 100 to 1,000 times weaker than the body's own oestrogen. This weak, partial binding is the basis of ongoing research into soy's potential role in menopausal symptom relief and bone health, and is also the source of popular concern about soy affecting hormone levels — concern not well supported by clinical trial evidence in adults consuming typical dietary amounts, according to major reviews including those from Cancer Council Australia.
☕
5
Before oat milk, soya milk was the preferred plant milk for coffee — its protein content allowed reasonable microfoam formation
Soya milk's relatively high protein content (3.3g/100ml, compared to almond milk's 0.5g) meant it was historically the most coffee-compatible plant milk before oat milk's rise — protein films stabilise the air bubbles that create espresso microfoam, and soy had enough protein to produce passable, if not perfect, latte texture. Café baristas throughout the 2000s and early 2010s worked almost exclusively with soya milk when serving dairy-free customers. Some cafés and brands (notably Bonsoy, a Japanese-style soya milk popular in Melbourne) built strong followings specifically for their superior steaming performance among soy options, a reputation the brand retains among coffee enthusiasts today.