Siggi’s is one of the healthier yogurts you can buy. A single serving of the plain nonfat variety delivers 19 grams of protein and only 5 grams of sugar for 100 calories, with no artificial sweeteners, flavors, or preservatives. That protein-to-sugar ratio is hard to beat in the yogurt aisle, and it’s the main reason Siggi’s has earned a reputation as a standout choice.
But “healthy” depends on which variety you pick and what you’re comparing it to. Here’s what’s actually in the container and how it stacks up.
What Makes Siggi’s Different From Regular Yogurt
Siggi’s is technically skyr, an Icelandic dairy product that’s strained more extensively than even Greek yogurt. That extra straining removes more whey (the liquid portion of milk), which concentrates the protein and creates a noticeably thicker, denser texture. The result is a product that packs significantly more protein per calorie than standard yogurt.
The ingredient list is refreshingly short. The whole milk plain variety contains just two items: cultured pasteurized whole milk and live active cultures. There are no gums, thickeners, or stabilizers, which is unusual for commercial yogurt. Many competing brands rely on pectin, gelatin, or locust bean gum to achieve thickness artificially. Siggi’s gets there through the straining process alone.
Nutrition by Variety
Siggi’s offers nonfat (0%), low-fat (2%), and whole milk (4%) options, plus flavored versions and a plant-based line. Your best choice depends on whether you’re prioritizing protein, managing carbs, or watching fat intake.
The plain nonfat skyr is the nutritional powerhouse: 100 calories, 19 grams of protein, and 5 grams of total sugar per three-quarter cup serving. Those 5 grams come from lactose, the naturally occurring sugar in milk, not from added sweeteners. A serving also provides 10% of your daily calcium needs.
Flavored varieties are where the sugar climbs. Siggi’s vanilla whole milk skyr, for example, contains 11 grams of carbohydrates with 5 grams of added sugar. That’s still modest compared to many flavored yogurts on the market, which can pack 15 to 25 grams of sugar per serving. But it’s worth checking the label, because the difference between plain and flavored can be meaningful if you’re eating yogurt daily.
For context, federal dietary guidelines recommend keeping added sugar below 50 grams per day (based on a 2,000-calorie diet). Five grams of added sugar in a flavored Siggi’s is 10% of that daily budget, which is reasonable for a snack that also delivers double-digit protein.
How the Protein Content Affects Appetite
The 19 grams of protein in a serving of plain Siggi’s isn’t just a number on a label. High-protein yogurt has measurable effects on how full you feel afterward. Research on women with overweight and obesity found that Greek yogurt (which has a similar protein profile to skyr) significantly increased feelings of fullness within 30 minutes of eating it, more so than a fat-based snack like peanuts. That fullness also carried over into the next meal, reducing the likelihood of overeating later.
This makes Siggi’s a particularly smart choice as a midmorning or afternoon snack. The combination of protein and the dense, thick texture means it tends to satisfy in a way that a granola bar or piece of fruit often doesn’t.
Blood Sugar and Carb Content
If you’re managing blood sugar, Siggi’s plain varieties are a strong option. The high protein and fat content slows the rate at which glucose enters your bloodstream, which helps prevent the sharp spikes that come from carb-heavy snacks. Icelandic and Greek-style yogurts are consistently recommended for people with type 2 diabetes because of their higher protein and lower carbohydrate content compared to regular yogurt.
One study found that people with type 2 diabetes who ate probiotic yogurt daily saw improvements in blood glucose levels, cholesterol, and blood pressure. Siggi’s contains five live active cultures, including strains commonly studied for gut health benefits. The whole milk version, with its added fat, may be especially effective at moderating blood sugar response because fat further slows glucose absorption.
The Plant-Based Line Is a Different Product
Siggi’s also makes a coconut-based, dairy-free yogurt. It’s worth noting that the nutritional profile is quite different from the dairy skyr. The mixed berry plant-based variety contains 8 grams of sugar, all from added sources, and uses pea protein, coconut cream, coconut oil, and macadamia nut butter as its base. It’s a reasonable dairy-free option, but it doesn’t match the protein density or low sugar content of the original skyr. If you’re choosing Siggi’s specifically for the protein-to-sugar ratio, the dairy versions are where that advantage lives.
Plain vs. Flavored: Where the Tradeoffs Are
The healthiest way to eat Siggi’s is to buy plain and add your own toppings. A handful of berries, a drizzle of honey, or some nuts gives you control over exactly how much sweetness you’re adding. You’ll almost always end up with less sugar than the pre-flavored versions.
That said, Siggi’s flavored yogurts are still well within a healthy range for most people. The brand was built around the idea of using less sugar than competitors, and a flavored Siggi’s typically contains half the sugar of a comparable Chobani or Yoplait product. If the choice is between a flavored Siggi’s and skipping a protein-rich snack altogether, the Siggi’s is the better call.
The whole milk (4%) varieties have more calories and saturated fat, which matters if you’re watching overall calorie intake. But they also tend to be more satisfying per serving, so you may find yourself snacking less later. For most people eating a balanced diet, the fat content in whole milk yogurt isn’t a concern.