Plain, pasteurized yogurt is the best choice during pregnancy, with Greek yogurt standing out for its high protein content and regular plain yogurt offering the most calcium per serving. The key safety rule is simple: any yogurt made from pasteurized milk is safe to eat. Most commercial yogurts sold in grocery stores meet this standard, but you should always check the label to confirm.
Why Pasteurization Matters
Pregnant women are 10 times more likely than the general population to contract Listeria, a bacterial infection that can cause miscarriage, stillbirth, or serious illness in newborns. Unpasteurized (raw) dairy products are one of the most common sources of this bacteria. The CDC lists pasteurized milk and dairy products made from pasteurized milk as the safer choice during pregnancy.
Nearly all yogurt brands sold in U.S. supermarkets use pasteurized milk, but artisanal or farmer’s market yogurts sometimes don’t. If the label says “raw milk” or doesn’t specify pasteurization, skip it. This applies to kefir and other cultured dairy products too.
Plain Yogurt vs. Greek Yogurt
Both are excellent choices, but they have different nutritional strengths. An 8-ounce serving of plain yogurt delivers roughly 415 to 452 milligrams of calcium, depending on whether it’s low-fat or full-fat. That’s nearly half the 1,000 milligrams of calcium you need daily during pregnancy (1,300 mg if you’re under 18). Greek yogurt contains less calcium because the straining process removes some whey, but it packs nearly double the protein of regular yogurt, typically 15 to 20 grams per serving compared to 8 to 12 grams.
If you’re struggling to meet your protein goals, Greek yogurt is the better pick. If calcium is your bigger concern, regular plain yogurt gives you more per serving. Either way, choosing plain over flavored lets you control how much sugar you’re adding. Fruit-flavored yogurts drop to about 345 milligrams of calcium per serving and often contain 15 to 25 grams of added sugar.
How Much Yogurt to Eat Per Day
The Dietary Guidelines for Americans recommend 3 cup-equivalents of dairy per day throughout pregnancy, regardless of trimester or calorie level. One cup of yogurt counts as one serving. You don’t need to get all three servings from yogurt alone. A glass of milk, a serving of cheese, and a cup of yogurt together would cover your daily target. But if yogurt is your preferred dairy source, two to three servings a day is reasonable and safe.
Probiotic Yogurt and Digestive Health
Yogurt that contains live active cultures, particularly Lactobacillus and Bifidobacterium strains, offers benefits beyond basic nutrition. These probiotics support healthy gut bacteria and may help with the constipation and bloating that are common during pregnancy. Research also suggests that probiotics found in yogurt can help protect against bacterial vaginosis during pregnancy by displacing harmful bacteria and calming inflammatory responses, offering a gentler alternative to antibiotics in some cases.
A case-control study of pregnant Chinese women found that those who regularly consumed probiotic yogurt during pregnancy had significantly lower rates of gestational diabetes compared to those who didn’t. Women without gestational diabetes consumed notably more probiotic yogurt, with an adjusted odds ratio suggesting roughly a 70% reduction in risk. This was specific to yogurt consumed during pregnancy, not before it. While one study isn’t definitive, it adds to a growing body of evidence linking fermented dairy to better blood sugar regulation.
Most yogurts labeled “contains live and active cultures” will have these beneficial bacteria. Look for that phrase on the container. Heat-treated yogurts, sometimes used in shelf-stable products, have had their cultures killed off and won’t provide the same probiotic benefit.
Yogurt as an Iodine Source
One nutrient in yogurt that often gets overlooked is iodine, which is critical for your baby’s brain development. Iodine fuels the production of thyroid hormones that guide fetal neurological growth. About 60% of pregnant women worldwide fall short of the recommended iodine intake. Dairy products are one of the top dietary sources of iodine, and a daily yogurt serving combined with milk and cheese can make a meaningful contribution toward closing that gap.
Flavored and Sweetened Yogurts
Plain yogurt is the ideal choice, but if you find it hard to eat unsweetened, adding your own fresh fruit or a drizzle of honey gives you control over the sugar content. Commercially flavored yogurts aren’t unsafe, but many contain 20 or more grams of added sugar per serving, which adds up quickly.
If you prefer yogurts sweetened with sugar substitutes, the available evidence is reassuring. Aspartame, sucralose, and acesulfame potassium have all been studied in pregnancy and are not expected to cause harm at normal consumption levels. Health Canada and other regulatory agencies consider them safe in moderation. One notable exception: if you have phenylketonuria (PKU), you should avoid aspartame because it breaks down into phenylalanine. For everyone else, an occasional sugar-free yogurt is fine, though whole foods with natural sugars are generally preferable to heavily processed alternatives.
Plant-Based Yogurt Alternatives
If you’re vegan, lactose intolerant, or simply prefer non-dairy yogurt, you can still meet your nutritional needs, but you’ll need to read labels carefully. Plant-based yogurts made from coconut, almond, oat, or cashew milk are often low in protein and calcium unless they’ve been fortified. Soy-based yogurt is the strongest non-dairy option. FDA fortification guidelines for soy beverages require 276 milligrams of calcium, 8 grams of protein, and 1.1 micrograms of vitamin B12 per cup, which closely mirrors dairy milk’s nutritional profile.
Not all plant-based yogurts follow these standards. Almond and coconut yogurts in particular can contain as little as 1 gram of protein and minimal calcium per serving. Always check the nutrition label for calcium (aim for at least 15 to 20% of the daily value per serving), protein (at least 5 to 8 grams), and vitamin B12. If your plant-based yogurt falls short, you’ll need to make up those nutrients elsewhere in your diet or through supplements.
Quick Guide to Choosing Yogurt
- Safest option: Any yogurt made from pasteurized milk, which includes the vast majority of store-bought brands.
- Best for calcium: Plain regular yogurt (415 to 452 mg per 8-ounce serving).
- Best for protein: Plain Greek yogurt (15 to 20 g per serving).
- Best for gut health: Yogurt labeled “contains live and active cultures,” especially those listing Lactobacillus or Bifidobacterium strains.
- Best plant-based option: Fortified soy yogurt, which comes closest to dairy in protein and calcium content.
- Worth limiting: Flavored yogurts with high added sugar. Top plain yogurt with berries or nuts instead.