Greek Yogurt for PCOS: GI 14, 17 g Protein, What to Buy

How to choose a Greek yogurt for PCOS

The numbers on this page are for plain, whole-milk Greek yogurt. What you buy can differ a lot, so five checks on the tub do most of the work.

• Plain, not flavored. Plain Greek yogurt has GI 14 and a glycemic load of 1 per 170 g in our table; flavored tubs add sugar the base product does not have.
• Read the added-sugar line. On a US Nutrition Facts label, plain yogurt should show 0 g under Includes Added Sugars; the sugar it does list is milk sugar (lactose).
• Check the protein. Strained Greek yogurt carries about 17 g protein per 170 g, against 6 g for plain regular yogurt in our table. A much lower number usually means it was thickened rather than strained.
• Fat level is your call. Full-fat, 2% and nonfat versions have similar protein; fat mainly changes texture and how long it keeps you full.
• Add your own fruit, nuts or seeds instead of buying fruit-on-the-bottom. See Greek yogurt vs regular yogurt and all yogurts compared.

Greek yogurt vs regular yogurt for PCOS

Straining removes whey and lactose, so plain Greek yogurt has more protein and less carbohydrate than regular yogurt. In our data a 170 g serving of plain whole-milk Greek yogurt has 17 g of protein, a GI of 14 and a GL of 1. The same serving of plain regular yogurt has 6 g of protein, a GI of 36 and a GL of 3.

Both are low on the glycemic scale; Greek yogurt is the more filling of the two. Full comparison: Greek yogurt vs regular yogurt.

Do you need to avoid dairy with PCOS?

No. Dairy is not off limits for PCOS, and the 2023 guideline does not recommend one diet over another or tell people to cut out dairy. How dairy fits depends on your subtype and how your body responds: see dairy and PCOS and the best yogurt for PCOS comparison.

Tips

• Check the ingredient label before assuming a Greek yogurt is the low-sugar option it's often marketed as — many flavored varieties add meaningful sugar, sometimes more per serving than a dessert.
• Plain, unsweetened Greek yogurt with fruit added yourself gives you the protein and low glycemic profile of the base product while letting you control how much natural sugar goes in on top.
• Full-fat and low-fat Greek yogurt have similar protein content; the fat content mostly affects texture, satiety, and calorie density rather than the core glycemic picture discussed on this page.
• Straining yogurt to make it "Greek-style" concentrates the protein compared with regular yogurt, which is the main reason it behaves differently — regular yogurt has real value too, just a different nutritional profile.
• Greek yogurt's protein content makes it a genuinely useful pairing food for a higher-glycemic breakfast, like granola or fruit, helping produce a steadier overall blood sugar response than either food eaten alone.
• Dairy-free "Greek-style" yogurts made from coconut or almond milk generally have far less protein than real Greek yogurt, since the straining process that concentrates protein depends on dairy's specific protein structure.
• If plain Greek yogurt tastes too tart for you on its own, adding a small amount of fruit or a drizzle of honey is a reasonable middle ground that still keeps the added sugar modest compared with a pre-flavored tub.
• Icelandic-style skyr is nutritionally similar to Greek yogurt, with comparably high protein and a low glycemic profile — a reasonable alternative if you prefer its texture or find it more widely available.
• A label that says "live and active cultures" means the yogurt contains live bacteria, but the PCOS trials that found lower fasting insulin used probiotic supplements with specific strains and doses, not yogurt, and a 2023 umbrella review rated that evidence moderate to low certainty. Treat any gut benefit from yogurt as possible rather than proven.