Know2eat

Plain yogurt

Also known as Natural yogurt, Set yogurt, Curd (dahi)

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Milk fermented with Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus, which acidify it until the casein sets into a gel. The two-strain starter is what legally defines yogurt in many countries.

Gut & Digestive HealthWeight ManagementBlood Sugar & Metabolic Health

Potential health benefits

Best supported: Strong

Ordered by how well the human research supports them — strongest first. A rating describes the state of the evidence, not how impressive the food is. How we rate evidence.

Digestive comfort

Gut & Digestive Health
Strong evidence

Research suggests live-culture yogurt improves lactose digestion and reduces symptoms in people with lactose maldigestion. Controlled trials replicate this consistently, and the effect disappears when the same yogurt is heat-treated, which is unusually clean evidence for a mechanism.

What may be going on: Bacterial lactase inside the intact starter cells survives gastric transit and hydrolyses lactose in the small intestine.

Strong evidence. Consistent findings across multiple good-quality human studies.

2 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Gut microbiome

Gut & Digestive Health
Moderate evidence

Research suggests regular fermented dairy intake produces measurable shifts in gut microbial composition and transit of the ingested strains. Whether these changes matter for health outcomes is a separate and much less settled question.

Moderate evidence. Several human studies point the same way, with real caveats.

1 source

Deep research mode adds each paper’s own conclusion and stated limitations.

Body composition

Weight Management
Limited evidence

Some cohort analyses link regular yogurt intake with less weight gain over time. The trial evidence is thin and confounding by overall diet pattern is a serious limitation.

Limited evidence. Early human work, or mostly lab and animal research.

1 source

Deep research mode adds each paper’s own conclusion and stated limitations.

Insulin sensitivity

Blood Sugar & Metabolic Health
Limited evidence

Observational data links higher yogurt intake with lower incidence of type 2 diabetes, but intervention trials measuring insulin sensitivity are few, small and inconsistent.

Limited evidence. Early human work, or mostly lab and animal research.

2 sources

Deep research mode adds each paper’s own conclusion and stated limitations.

Ask about Plain yogurt

Ask about Plain yogurt

Answers are written only from the entries on this page — the same nutrients, compounds, claims and citations you can read above. Nothing is added from outside the database, and every answer lists what it was built from.

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Key nutrients

Nutrient content per 100 grams
NutrientAmount% DV
Macronutrients
Calories61 kcal3%
Protein3.47 g7%
Total fat3.25 g4%
Carbohydrate4.66 g2%
Fibre0 g0%
Total sugars4.66 g—
Water87.9 g—
Fats
Saturated fat2.1 g10%
Monounsaturated fat0.893 g—
Polyunsaturated fat0.092 g—
Cholesterol13 mg4%
EPA (omega-3)0 g—
DHA (omega-3)0 g—
DPA (omega-3)0 g—
Linoleic acid (omega-6)0.065 g—
Vitamins
Vitamin A27 µg3%
Vitamin C0.5 mg1%
Vitamin D0.1 µg1%
Vitamin E0.06 mg0%
Vitamin K0.2 µg0%
Thiamin (B1)0.029 mg2%
Riboflavin (B2)0.142 mg11%
Niacin (B3)0.075 mg0%
Pantothenic acid (B5)0.389 mg8%
Vitamin B60.032 mg2%
Folate7 µg2%
Vitamin B120.37 µg15%
Choline15.2 mg3%
Minerals
Calcium121 mg9%
Iron0.05 mg0%
Magnesium12 mg3%
Phosphorus95 mg8%
Potassium155 mg3%
Sodium46 mg2%
Zinc0.59 mg5%
Copper0.0090 mg1%
Manganese0.0040 mg0%
Selenium2.2 µg4%
Other measured compounds
Beta-carotene5 µg—
Alpha-carotene0 µg—
Lycopene0 µg—
Lutein + zeaxanthin0 µg—
Caffeine0 mg—
Ash0.72 g—

Nutrient values are per 100 g of the USDA reference entry named on this page and vary with variety, growing conditions, storage and preparation.

Source record: Yogurt, plain, whole milk (USDA FoodData Central, FDC ID 171284).

% DV uses the FDA Daily Values for adults and children aged 4 and over. A dash means no Daily Value has been established for that nutrient.

Bioactive compounds

Compounds present in meaningful amounts. Presence is banded rather than quantified, because whole-food levels vary enormously with variety, growing conditions, storage and preparation.

How preparation changes things

Only effects with real support are listed. If a preparation method is missing, it is because nothing dependable is documented — not because it makes no difference.

  • fermentedReduces lactose

    Starter bacteria hydrolyse part of the lactose during fermentation and carry their own lactase into the small intestine, which is why yogurt is digested better than milk by people with lactose maldigestion.

Things to know

Allergies, interactions and intake concerns. Every food gets this section — a reference where everything is uniformly good is not a reference.

  • Allergy

    Cow milk protein allergy

    Fermentation alters milk proteins but does not remove them; yogurt is not safe in milk protein allergy.

  • Worth knowing

    Live cultures and immunosuppression

    Live-culture foods are generally safe, but invasive infections with lactobacilli and related organisms have been reported in severely immunocompromised patients and those with central lines. Clinical advice applies in that setting.

  • Too much

    Added sugar in flavoured yogurt

    Flavoured yogurts frequently contain several teaspoons of added sugar per pot, which changes the food substantially from the plain product described here.

  • Worth knowing

    Pasteurising after culturing removes the cultures

    Heat-treated yogurts keep the texture and acidity but no longer contain live organisms, which matters for the one outcome where the live cultures are what does the work.