Oat and almond milk are among the most popular plant-based milk alternatives today, praised for being vegan, lactose-free, and often lower in calories than dairy milk. However, they’re not automatically healthier simply because they are “milk alternatives.” Depending on your nutritional needs, blood sugar goals, and ingredient quality, oat and almond milk may backfire, especially when relied on as a staple without considering their limitations and added ingredients.
Nutritional limitations of oat and almond milk
Both oat and almond milk typically have much less protein than dairy milk, often around 1–3 grams per cup compared to dairy’s ~8 grams. This matters if you’re using plant milk as a primary protein source in smoothies, cereals, or kids’ diets. For bone health, many brands add calcium and vitamin D, but fortified nutrients may not be absorbed as effectively as those naturally found in dairy.
Carbohydrates, sugars, and energy balance
Oat milk is naturally higher in carbohydrates and sugars than many other plant milks, since the processing breaks down oat starch into simpler sugars. That can cause blood sugar spikes, especially in sweetened versions, which makes oat milk less suitable for people managing insulin resistance, diabetes, or low-carb diets. By contrast, almond milk’s lower carbohydrate profile may help control glucose levels, but on its own it still provides minimal protein and calories.
Potential side effects and hidden ingredients
Many commercial oat and almond milk brands include additives, thickeners, or oils (e.g., rapeseed/canola oil, gums, or carrageenan) to enhance texture and shelf stability. For some individuals, these additives can cause digestive discomfort, including bloating, gas, or altered bowel habits, especially in sensitive people or those with IBS.
Allergens and intolerances
Almond milk is unsuitable for people with nut allergies, which can cause serious reactions. Meanwhile, oat milk may be contaminated with gluten if not certified gluten-free, posing risks for those with celiac disease or gluten sensitivity. This makes label reading and product selection essential if you have dietary sensitivities.
