Is Greek yogurt healthy?

Greek yogurt has become a fridge staple, and it carries a halo: high protein, gut-friendly, good for weight loss. You've probably seen it recommended as a snack, a breakfast and a sour cream swap, all in the same week.

So is Greek yogurt good for you, or is the halo bigger than the food? Mostly the food earns it, as long as you buy it plain. This page covers how much protein is in Greek yogurt and what straining changes, whether its cultures count as probiotics, how it handles lactose, what the diabetes, heart and bone studies found, the real downsides, which medicines to keep apart from it, and how to pick the healthiest tub.

If you've ever stood in the dairy aisle comparing dozens of nearly identical cups, you know how hard it is to tell which one is actually healthy. Three lines on the label do most of the work, and you'll know which ones by the end.

How Much Protein Is in Greek Yogurt?

A 6-ounce (170-gram) cup of plain nonfat Greek yogurt has about 17 grams of protein for about 100 calories in USDA FoodData Central, so nearly every calorie in it is pulling its weight. The table lines up the plain and flavored versions against regular yogurt:

Source: USDA FoodData Central, SR Legacy FDC IDs 170894, 170903, 171304, 170902, 170901, 170887 and 170886, scaled to 170 grams and rounded. In plain yogurt, all of the sugar comes from the milk.

If you want the highest-protein Greek yogurt, plain nonfat is it: it has the most protein and the fewest calories of the plain types. Fat adds calories without adding protein, so whole-milk Greek yogurt lands at about 15 grams for 165 calories. Flavored cups lose a few grams of protein to the fruit and sweetener and gain 10 to 14 grams of sugar.

Greek Yogurt vs Regular Yogurt: What Straining Changes

Greek yogurt starts as regular yogurt. Straining removes much of the liquid whey, and with it water, some lactose and some minerals, which concentrates the protein. Dairies do it with separators or by ultrafiltration, according to the US Dairy Export Council, an industry body.

Cup for cup in USDA's data, plain nonfat Greek yogurt has:

• About 1.8 times the protein of plain nonfat regular yogurt, 17.3 grams against 9.7.
• Less than half the sugar, 5.5 grams against 13.1.
• About 45 percent less calcium, 187 milligrams against 338, and about 45 percent less potassium.
• Less than half the sodium, 61 milligrams against 131.

So neither one is simply healthier. Greek yogurt comes out ahead on protein and sugar, and regular yogurt comes out ahead on calcium and potassium.

Two things the front of the tub won't tell you. First, not every thick yogurt is fully strained: the same industry source describes a less common method that adds whey protein, milk protein or ultrafiltered milk to the milk before pasteurization, and the ingredient list shows which method you're buying. Second, straining leaves behind a sour liquid called acid whey, a co-product the dairy has to put to use or dispose of.

Does Greek Yogurt Have Probiotics?

Usually, yes. Under the federal standard (21 CFR 131.200), every yogurt sold in the US is cultured with two bacteria, Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus. A tub may say it contains live and active cultures only if it held at least 10 million colony-forming units per gram when it was made, with a reasonable expectation of 1 million per gram through its shelf life. If the yogurt was heat-treated after culturing, which kills the bacteria, the label must carry the words "does not contain live and active cultures."

Whether those cultures count as probiotics depends on the definition. The International Scientific Association for Probiotics and Prebiotics defines probiotics as "live microorganisms which when administered in adequate amounts confer a health benefit on the host" (Hill and colleagues, 2014). For yogurt cultures, the best-documented benefit is lactose digestion, which the next section covers.

The broader gut-health evidence is promising but early. In a 2021 Stanford trial by Wastyk and colleagues, 36 healthy adults were randomly assigned to a diet high in fermented foods or a diet high in fiber. The fermented-food group, eating foods such as yogurt, kefir and kimchi, ended up with more diverse gut bacteria and lower levels of inflammatory markers in the blood, while the fiber group's markers didn't fall, according to a Stanford-credited summary of the study. It was one small trial, so treat it as a lead rather than a verdict.

Exercise shifts your gut bacteria too. Our review of how exercise changes your gut microbiome covers that side of the research.

Does Greek Yogurt Have Lactose?

Yes, but not much. A 6-ounce cup of plain Greek yogurt has about 4 to 5 grams of lactose in USDA's data. That's roughly a third of the 12 grams that the NIDDK gives as an amount that often causes only mild symptoms, or none, in lactose intolerance.

Yogurt also helps you digest the lactose it does contain. Its bacteria make their own lactase, the enzyme that breaks lactose down. In a review of the research, Savaiano (2014) explained that this bacterial lactase survives the stomach, protected inside the bacterial cells and by the yogurt's buffering, then gets to work in the small intestine and digests enough lactose to prevent symptoms in many lactose-intolerant people. The European Food Safety Authority reviewed 14 human studies, found that 13 showed better lactose digestion with live yogurt cultures, and approved the claim that live cultures in yogurt improve the digestion of its lactose in people who digest lactose poorly.

Two practical points follow. Heat-treated yogurt, the kind labeled as not containing live and active cultures, loses that advantage. And Savaiano noted that flavored yogurts showed somewhat lower lactase activity than plain ones, though people still tolerated them well. If even yogurt bothers you, lactose-free milk or a fortified plant milk can fill the gap, and our page on whether almond milk is healthy compares the options.

Greek Yogurt and Type 2 Diabetes

Yogurt has the most consistent diabetes data of any dairy food. In a 2014 analysis of three large US cohorts by Chen and colleagues, with 15,156 new cases of type 2 diabetes, each extra daily serving of yogurt went with a 17 percent lower risk, while total dairy showed no link. Their meta-analysis of 14 cohorts with 459,790 people put the figure at 18 percent per daily serving.

In March 2024 the FDA said it would allow yogurt makers to use a qualified health claim: eating yogurt regularly, at least 2 cups (3 servings) a week, may reduce the risk of type 2 diabetes. The claim has to add that the FDA found only limited information supporting it. That sums up the evidence: a consistent pattern in observational studies, without trials proving that yogurt prevents diabetes.

If you already have diabetes, plain Greek yogurt is an easy fit. A 6-ounce cup of plain nonfat has about 6 grams of carbohydrate, most of it lactose, alongside 17 grams of protein. A flavored cup can bring 16 to 19 grams of sugar instead, and that counts toward your carbohydrate total.

Is Greek Yogurt Good for Your Heart and Blood Pressure?

The strongest data come from people who already have high blood pressure. In a 2018 analysis by Buendia and colleagues of 55,898 women and 18,232 men with high blood pressure, those who ate at least two servings of yogurt a week had a 17 percent (women) and 21 percent (men) lower risk of heart attack and stroke than those who ate less than one serving a month.

Whether yogurt prevents high blood pressure is less settled. The same research group found that people eating five or more servings a week had a 16 percent lower risk of developing it across three cohorts (Buendia and colleagues, 2018), but an earlier pooled analysis by Soedamah-Muthu and colleagues (2012) found no clear link between yogurt and new high blood pressure in five cohorts. Across 21 countries, the PURE study of 136,384 adults found that people eating more than one serving of yogurt a day had a 14 percent lower risk of death or major cardiovascular events than people who ate none. None of these were trials, so they show associations rather than cause and effect.

Is Greek yogurt healthy for cholesterol? The plain nonfat and low-fat versions are, with 0.2 to 2.1 grams of saturated fat per 6 ounces. Whole-milk Greek yogurt has about 4.1 grams, a fifth of the 20-gram Daily Value, so it's the version to limit if your LDL cholesterol is high.

Greek Yogurt and Bone Health

Greek yogurt still helps your bones, though straining costs it calcium. A 6-ounce cup of plain Greek yogurt has about 170 to 196 milligrams of calcium, 13 to 15 percent of the 1,300-milligram Daily Value, while the same amount of regular yogurt has 311 to 338.

In pooled cohort studies, yogurt eaters broke fewer hips. Bian and colleagues (2018) combined 10 cohort studies and found a 25 percent lower risk of hip fracture with the highest yogurt intake compared with the lowest. Cheese also showed a lower risk, while milk and total dairy showed no significant link.

Older adults show the same pattern. The TUDA study by Laird and colleagues (2017) looked at 4,310 Irish adults over 60. Women with the highest yogurt intake had 3.1 to 3.9 percent higher bone density at the hip, and each step up in yogurt intake went with a 39 percent lower risk of osteoporosis in women and a 52 percent lower risk in men.

Food is only half of bone health, because bones also respond to load. Our guide to bone density exercises at home covers the moves that help.

Is Greek Yogurt Good for Weight Loss?

Yes, mostly because of its protein, which keeps you full while you eat less. In a large analysis of US cohorts by Mozaffarian and colleagues (2011), yogurt had the strongest link to less weight gain of any food they studied, about 0.8 pounds less every four years for each extra daily serving. If you're choosing between Greek yogurt and cottage cheese for weight loss, our cottage cheese weight-loss guide compares the two head to head.

Is There a Downside to Greek Yogurt?

A few, and each one is easy to manage:

• Added sugar in flavored cups. USDA's vanilla nonfat Greek yogurt has about 16 grams of sugar per 6 ounces, and since vanilla brings none of its own, about 10 of those grams are added. The American Heart Association suggests keeping added sugar to about 100 calories a day for most women and 150 for most men, roughly 25 and 37 grams (Johnson and colleagues, 2009).
• Saturated fat in whole-milk versions. A 6-ounce cup carries a fifth of the day's saturated fat.
• Less calcium than regular yogurt. If yogurt is your main calcium source, regular yogurt or milk gives you more per serving.
• Milk allergy. Yogurt is made from milk protein, so it's off the menu.
• Pregnancy. The CDC counts yogurt made from pasteurized milk among its safer choices for avoiding Listeria, and our page on whether cottage cheese is healthy covers the Listeria rules for fresh cheeses.

What not to mix with Greek yogurt?

Some antibiotics. Calcium and other minerals in dairy can bind to certain antibiotics in the gut and keep them from being absorbed. In a crossover trial by Neuvonen and colleagues (1991), seven healthy volunteers took 500 milligrams of the antibiotic ciprofloxacin with water, milk or yogurt. Yogurt cut the peak blood level by 47 percent, and milk and yogurt reduced total absorption by 30 to 36 percent.

Tetracycline antibiotics are affected too. An older review by Neuvonen (1976) reported that dairy products can cut their absorption by 50 to 90 percent or more, and that a three-hour gap prevented the interaction. Take these medicines with water, and ask your pharmacist how far apart to keep them from yogurt and milk.

Which Type of Greek Yogurt Is the Healthiest?

For most people, plain nonfat or low-fat Greek yogurt with live cultures is the healthiest choice. Brands differ less than the packaging suggests, so check three things on the label:

1. Added Sugars. Plain should read 0 grams. If you want sweetness, stir in fruit yourself.
2. Live and active cultures. Look for that statement, and skip tubs that say they don't contain live and active cultures.
3. Ingredients. Strained Greek yogurt can be as simple as milk and cultures. Added milk protein concentrate or other thickeners usually means a Greek-style yogurt made thick without full straining.

Fat level is a matter of taste and goals. Nonfat gives the most protein per calorie, while whole milk is creamier and adds saturated fat. Protein per cup is worth a glance too: in USDA's data, plain Greek yogurts run about 15 to 17 grams per 6 ounces.

What This Means for You

Plain Greek yogurt earns its health reputation. It delivers a lot of protein for the calories, usually comes with live cultures that help with lactose, and shows up on the favorable side of the diabetes, heart and bone studies, even though those studies can't prove cause and effect. The two habits that keep it healthy are buying it plain and keeping it apart from the antibiotics it interferes with.

What you eat matters most when it supports what you do. Protein and calcium do more for muscle and bone when you're also training, and the training is the part most people struggle to keep up. Stacy, 41, said it plainly: "After my second kid, I needed something stupidly simple." If consistency is your hard part, the apps on our list of the best workout apps for weight loss are built around that problem. FitCraft pairs you with a 3D AI coach who shows you every move of your home bodyweight and dumbbell workouts and calls you by name, and its streaks and leaderboards make the next workout easier to show up for.