Greek Yogurt Nutrition: Protein, Calories and How Brands Compare
Greek yogurt is strained to remove whey, which roughly doubles the protein and halves the sugar compared with regular yogurt of the same weight. That straining is the whole story behind its macros — and the reason the flavoured tubs on the same shelf can carry three times the sugar of the plain ones.
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Consult a registered dietitian or healthcare provider for personalized dietary guidance.
Key Takeaways
- 100 g plain nonfat Greek yogurt: 59 kcal, 10.2 g protein, 3.6 g carbohydrate, 0.4 g fat.
- A standard 170 g single-serve cup delivers roughly 17 g of protein — comparable to two large eggs.
- Greek yogurt has about double the protein and half the carbohydrate of regular yogurt.
- Flavoured varieties commonly add 8–15 g of sugar per cup; plain plus fruit is almost always the better trade.
- Straining removes some calcium: Greek yogurt supplies roughly 110 mg per 100 g versus ~180 mg in regular.
Plain Greek Yogurt: Full-Fat vs Low-Fat vs Nonfat
Per 100 g, plain and unsweetened:
| Nutrient | Nonfat (0%) | Low-fat (2%) | Whole (5%) |
|---|---|---|---|
| Calories | 59 kcal | 73 kcal | 97 kcal |
| Protein | 10.2 g | 9.9 g | 9.0 g |
| Total Fat | 0.4 g | 1.9 g | 5.0 g |
| Saturated Fat | 0.1 g | 1.2 g | 3.2 g |
| Carbohydrate | 3.6 g | 3.9 g | 3.9 g |
| Sugars | 3.2 g | 3.5 g | 3.6 g |
| Calcium | 110 mg | 111 mg | 100 mg |
| Sodium | 36 mg | 34 mg | 35 mg |
Source: USDA FoodData Central — Yogurt, Greek, plain, nonfat (FDC ID 170903) and related entries.
The protein difference across fat levels is small. Choose based on satiety and how it fits your fat budget, not on a belief that nonfat is automatically better — whole-milk Greek yogurt is more satiating per gram for many people.
Greek vs Regular Yogurt
Per 100 g plain, nonfat:
| Nutrient | Greek | Regular | Difference |
|---|---|---|---|
| Calories | 59 kcal | 56 kcal | +3 kcal |
| Protein | 10.2 g | 5.7 g | +4.5 g |
| Carbohydrate | 3.6 g | 7.7 g | −4.1 g |
| Sugars | 3.2 g | 7.7 g | −4.5 g |
| Calcium | 110 mg | 183 mg | −73 mg |
| Sodium | 36 mg | 77 mg | −41 mg |
Straining removes liquid whey, which carries lactose (the sugar) and much of the calcium, while concentrating casein protein. That is why Greek yogurt is usually the better fit for blood-sugar-focused eating — see our guides on the insulin resistance diet and foods that lower blood sugar.
Protein per Brand: What to Look For
Product formulations change, so treat the label as the final word. That said, the pattern across the category is consistent:
| Product type | Typical serving | Protein | Added sugar |
|---|---|---|---|
| Plain nonfat Greek | 170 g cup | 17–18 g | 0 g |
| Plain whole-milk Greek | 170 g cup | 15–16 g | 0 g |
| Flavoured Greek (fruit on bottom) | 150 g cup | 11–13 g | 9–15 g |
| "Light" / zero-sugar Greek | 150 g cup | 12–15 g | 0 g (sweetener) |
| High-protein / Icelandic skyr | 150 g cup | 17–20 g | 0–5 g |
| Greek-style yogurt (thickened) | 150 g cup | 5–8 g | 5–12 g |
Two label rules that catch most people out:
- "Greek-style" is not Greek yogurt. If the product is thickened with starch, milk protein concentrate, or gelatin rather than strained, protein can be half what you expect.
- Compare per 100 g, not per cup. Cup sizes range from 100 g to 227 g, which makes front-of-pack protein claims hard to compare directly.
Probiotics and Gut Health
Yogurt with live active cultures supplies Lactobacillus bulgaricus and Streptococcus thermophilus, and many brands add Bifidobacterium or L. acidophilus. Clinical evidence is strongest for improving lactose digestion and modestly reducing antibiotic-associated diarrhoea; broader claims about gut healing are far less settled.
Heat-treated yogurts have no live cultures — look for "live and active cultures" on the label if that is your reason for eating it. Our gut health diet plan covers where fermented foods actually fit.
A note for low-FODMAP diets: straining lowers lactose, and many people who react to regular yogurt tolerate Greek yogurt in 100–150 g portions. See the low FODMAP meal plan for testing this properly.
Practical Portions
| Portion | Calories (nonfat) | Protein |
|---|---|---|
| 100 g | 59 kcal | 10 g |
| 170 g (single cup) | 100 kcal | 17 g |
| 200 g | 118 kcal | 20 g |
| 250 g | 148 kcal | 26 g |
A 200 g bowl with 30 g of berries and 10 g of chia seeds lands at roughly 215 kcal, 24 g protein, 8 g fibre — one of the highest protein-per-calorie breakfasts you can assemble without cooking. More options in our high-protein breakfast ideas.
Frequently Asked Questions
How much protein is in a cup of Greek yogurt?
A standard 170 g single-serve cup of plain nonfat Greek yogurt contains about 17 g of protein. A 227 g (8 oz) cup contains roughly 23 g.
Is Greek yogurt better than regular yogurt?
For protein and blood-sugar impact, yes — roughly double the protein and half the sugar per 100 g. Regular yogurt supplies more calcium per gram and is usually cheaper, so it is not strictly better on every measure.
Which Greek yogurt has the most protein?
Plain, unsweetened varieties and Icelandic skyr sit at the top, typically 10–13 g of protein per 100 g. Flavoured tubs are diluted with fruit preparation and sugar, so they land lower.
Is Greek yogurt good for weight loss?
It supports it. High protein and low energy density improve satiety per calorie, and plain nonfat Greek yogurt is among the most protein-dense foods per calorie available. Weight loss still depends on total intake, not on any single food.
Can I eat Greek yogurt if I am lactose intolerant?
Many people can. Straining removes much of the lactose and live cultures help digest the rest, so 100–150 g portions are often tolerated. Reactions vary — introduce a small amount and assess.
Is full-fat Greek yogurt unhealthy?
No. Whole-milk Greek yogurt has more saturated fat but similar protein, and fermented dairy is consistently associated with neutral or favourable cardiometabolic outcomes in observational research. Fit it to your overall fat intake.
Compare with other high-protein staples
- Chicken breast nutrition — 31 g protein per 100 g cooked
- Chicken thigh nutrition — richer, higher-fat cut
- Salmon nutrition — protein plus EPA and DHA
- How much protein per day — how much you actually need
Sources
- USDA FoodData Central: Yogurt, Greek, plain, nonfat (FDC ID 170903).
- USDA FoodData Central: Yogurt, Greek, plain, whole milk (FDC ID 330137).
- Savaiano DA. Lactose digestion from yogurt: mechanism and relevance. Am J Clin Nutr. 2014;99(5):1251S-1255S. https://pubmed.ncbi.nlm.nih.gov/24695892/
- Mozaffarian D. Dairy foods, obesity, and metabolic health. Advances in Nutrition. 2019;10(5):917S-923S. https://pubmed.ncbi.nlm.nih.gov/31518410/
Reviewed and maintained by the Nutrition.io Editorial Team. See our editorial policy for how we research, source, and update this guide.
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