Greek Yogurt vs Skyr: Which Is Higher in Protein?

If you only want the headline: plain, nonfat skyr edges out plain, nonfat Greek yogurt on protein, but only by about a gram per 100 grams. Both leave ordinary yogurt in the dust. In a typical 170 gram pot, that works out to roughly 18 to 19 grams of protein for skyr and 17 to 18 grams for Greek. A difference that small will not decide your physique. What you do with the rest of your day matters far more.

Greek yogurt

Greek yogurt is regular yogurt that has been strained to remove much of the watery whey. Straining leaves behind a thicker product with the protein concentrated into a smaller volume, which is why a Greek tub carries so much more protein than the yogurt it started as. It comes in everything from 0 percent fat to full-fat, and the fat level changes the numbers, which we will get to.

Skyr

Skyr is an Icelandic staple that is technically closer to a fresh, soft cheese than a yogurt, though it looks and tastes like one. It is cultured, then strained heavily, traditionally from skimmed milk, which is why classic skyr is naturally very low in fat and high in protein. In practice, skyr and Greek yogurt land in the same corner of the chiller and serve the same purpose: a thick, tangy, protein-dense spoonful.

Exact figures vary by brand, so treat these as typical values for plain versions rather than gospel for any one tub. The pattern, though, holds across brands.

Two things jump out. First, skyr's lead over nonfat Greek is real but tiny. Second, the biggest swing in the table is not skyr versus Greek at all, it is what fat does. Full-fat Greek yogurt has noticeably less protein per 100 grams than the nonfat version, because the fat takes up room the protein would otherwise fill. If maximum protein per calorie is your goal, the fat choice outweighs the Greek-versus-skyr choice.

Chasing the extra gram in skyr while ignoring these two factors is missing the forest for the trees.

• Added sugar. A flavored, fruit-on-the-bottom tub can carry 15 grams of sugar or more, turning a lean protein food into a dessert. Plain versions of both skyr and Greek yogurt are the smart default, sweetened at home with fruit if you like.
• Fat level. Nonfat gives the highest protein per calorie, which suits fat loss. Full-fat is more filling and richer, and is perfectly fine if it fits your calories. Choose deliberately rather than by accident.
• Brand. Protein per 100 grams varies more between brands than it does between the two categories. The label is the only reliable source, not the name on the front.
• How much you eat. A big bowl of nonfat Greek yogurt beats a tiny pot of skyr every time. Portion size dwarfs the per-100-gram difference.

1. Go plain first. Plain versions of both are lower in sugar and higher in protein per calorie. Add your own fruit, honey, or cinnamon at home for a fraction of the sugar.
2. Pick your fat level on purpose. Nonfat for maximum protein per calorie, full-fat for richness and staying power. Both are valid, just decide rather than drift.
3. Compare per 100 grams. Ignore the marketing and read the protein figure per 100 grams so you are comparing like with like across brands.
4. Buy the one you will actually eat. The best tub is the one you enjoy enough to eat regularly. Taste and texture keep the habit going, and consistency beats a one-gram edge.

Both are excellent, complete dairy proteins, rich in the amino acids that support muscle, and both score highly on modern protein-quality measures. Whichever you reach for, you are getting a top-tier protein source. The winner is simply whichever one gets you eating more protein, more often.

Plant-based eaters have a clear best pick: soy yogurt. Among the plant options it is comfortably the highest in protein, typically around 4 to 6 grams per 100 grams, and some strained, skyr-style soy tubs now reach close to Greek-yogurt territory. Soy yogurt is a complete protein, so it needs no combining.

Be aware that most other plant yogurts, made from coconut, almond, oat, or cashew, are low in protein, often 1 gram per 100 grams or less, because the base ingredients simply do not carry much. They can be delicious, but they are not protein foods. If protein is the point, reach for a soy-based tub and check the label the same way you would with dairy, or top a lower-protein plant yogurt with a scoop of plant protein powder, seeds, or nuts to bring the total up.