Unsweetened almond milk is one of the better beverage choices for gestational diabetes. With roughly 1 gram of carbohydrates per cup and zero sugar, it has minimal impact on blood sugar compared to most other milks and milk alternatives. The key word, though, is “unsweetened,” because sweetened varieties contain nearly 10 grams of sugar per cup and behave very differently in your body.
Why Carb Content Matters Most
Managing gestational diabetes comes down to controlling how many carbohydrates you eat at each meal and snack, because carbs are what raise blood sugar. A cup of unsweetened almond milk has about 1 gram of carbs and 0 grams of sugar, making it almost negligible in a meal plan. That gives you more room to spend your carb budget on nutrient-dense foods like whole grains, fruit, or legumes rather than on your drink.
For comparison, a cup of unsweetened oat milk contains about 5 grams of carbs per 100-gram serving, which is roughly 17 times more than the same amount of unsweetened almond milk. Cow’s milk lands in the middle, with about 12 grams of carbs per cup from its natural milk sugar (lactose). Research comparing blood sugar responses found no significant difference between almond milk and dairy milk, but almond milk’s lower carb count makes it easier to fit into tighter carb targets, which is common with gestational diabetes.
Sweetened vs. Unsweetened: A Major Difference
This is where many people get tripped up. A cup of sweetened almond milk contains about 10.5 grams of carbohydrates and nearly 10 grams of sugar, most of it added. That’s more than ten times the carb load of the unsweetened version. The type of sweetener used also matters: different added sugars produce different blood sugar spikes, so the impact can be unpredictable.
Sugar-sweetened beverages in general are linked to higher risk of type 2 diabetes and heart disease. When you’re already managing elevated blood sugar during pregnancy, there’s no benefit to choosing a sweetened variety. Always check the label. Products labeled “original” flavor are often sweetened. Look specifically for “unsweetened” on the front of the carton, then confirm by checking that added sugars read 0 grams on the nutrition facts panel.
The Protein Gap
Almond milk’s biggest weakness is protein. A cup contains just 1 gram, compared to about 8 grams in cow’s milk and 7 grams in soy milk. Protein matters for gestational diabetes because it slows digestion and helps prevent blood sugar spikes after meals. It’s also essential for your baby’s growth during the second and third trimesters, when protein needs increase.
If almond milk is your go-to, you’ll need to make up that protein elsewhere in the same meal or snack. Pairing it with eggs at breakfast, blending it into a smoothie with nut butter, or having it alongside Greek yogurt are all practical ways to compensate. Soy milk is worth considering as an alternative if you want a plant-based option with substantially more protein.
Calcium and Vitamin D in Fortified Versions
Pregnancy increases your need for both calcium and vitamin D, and almond milk on its own contains very little of either. Fortified almond milk, however, performs reasonably well on calcium. An international analysis of plant-based beverages found that fortified almond milks provided a median of 35% of the daily value for calcium per serving, which is comparable to or slightly higher than what you’d get from a glass of cow’s milk.
Vitamin D is a different story. Fortified almond milks deliver only about 10 to 12% of the daily value per serving, which ranks among the lowest of all fortified plant milks. If almond milk is replacing cow’s milk in your diet regularly, you may need additional vitamin D from other foods or a prenatal supplement to meet pregnancy requirements.
Healthy Fats Without the Downsides
Almond milk contains no cholesterol and no saturated fat, which is a plus during pregnancy when cardiovascular strain increases. It provides small amounts of omega-3 fatty acids, which support both your heart health and your baby’s brain development. The American Diabetes Association’s 2026 standards of care for diabetes in pregnancy specifically recommend eating patterns that include nuts, seeds, and healthy omega-3 fatty acids, while avoiding excess saturated fat. Almond milk fits neatly into that framework.
How It Compares to Other Milks
- Cow’s milk: Higher in protein (8 grams) and naturally contains calcium and vitamin D, but has about 12 grams of carbs per cup from lactose. A solid choice if you can tolerate the carb load within your meal plan.
- Soy milk: The closest plant-based match to cow’s milk nutritionally, with about 7 grams of protein and moderate carbs. A strong option if you want plant-based milk with real protein.
- Oat milk: Significantly higher in carbs than almond milk, making it the least favorable plant milk for blood sugar management. Even unsweetened versions contain more than 5 grams of carbs per 100-gram serving.
- Unsweetened almond milk: Lowest in carbs and sugar of any common milk option, but also the lowest in protein. Best when used as part of a meal that includes protein from other sources.
Making It Work in Your Meal Plan
The ADA emphasizes that nutrition plans for gestational diabetes should be individualized, ideally developed with a registered dietitian who understands the condition. No single food makes or breaks blood sugar control. What matters is the overall balance of your meals: enough carbs to fuel your pregnancy without spiking glucose, enough protein to support your baby’s growth, and enough variety to cover your micronutrient needs.
Unsweetened almond milk works well as a low-carb base for smoothies, cereal, or coffee. It’s especially useful at meals where you’re already eating a carb-heavy food and want to keep the total load in check. Just be intentional about filling the nutritional gaps it leaves, particularly protein, vitamin D, and overall calories (a cup has only about 37 calories, which is not much fuel for a pregnant body). Used thoughtfully alongside a balanced diet, it’s one of the more blood-sugar-friendly options available.