Oat milk's cons include high carbs/sugars (spiking blood sugar), low protein, potential for gluten contamination (bad for celiac), added oils/fillers, digestive issues (bloating/gas from fiber/emulsifiers), and potential heavy metal/glyphosate residues, making unsweetened, fortified options better, especially avoiding it for infants.
Con: not suitable for all diets
"It's normal for food to raise your blood sugar." Oat milk also contains fibre – no bad thing in itself, as it "promotes bowel regularity", said the i news site, but, if you're sensitive to fibre or simply drink too much, it "can lead to bloating and gassiness".
Key Takeaways. Drinking oat milk daily can cause allergic reactions in some people. Oat milk may lead to bloating and indigestion due to its high fiber content. Some oat milk brands add sugar, which can lead to weight gain and dental problems.
People are quitting oat milk due to concerns about highly processed ingredients like seed oils and emulsifiers, its impact on blood sugar (due to broken-down starches and added sugars), low protein content, potential inflammation, and gut health issues, with some wellness influencers shifting to cow's milk or other alternatives like almond or soy. The trend reflects a growing awareness that while convenient, many commercial oat milks aren't as "natural" or nutritionally complete as initially perceived, leading consumers to seek whole foods or dairy for better protein and fat balance.
Drinking oat milk is probably fine for your body unless you're drinking large quantities of it, already loading your diet with carbs, and/or diabetic. If most of your day's liquid is coming from any milk, plant-based or not, that's probably not great. Moderation is key.
'Non-organic oats may contain glyphosate residues – a pesticide linked in early research to hormone disruption – while seed oils and emulsifiers, common in many commercial brands, can contribute to inflammation and gut imbalances in sensitive individuals,' she explains.
The other main criticism leveled at oat milk is that it can be a source of seed oils. Not all brands of oat milk contain seed oils such as rapeseed or canola oil, but some do. "Many plant milks—including oat milk—contain seed oils, which tend to contribute to inflammation in the body," said Smith.
A naturally occurring ingredient in the whole grain oats used to make oat milk, is fiber. Prebiotic fiber, specifically, can help nurture and balance out your gut microbiome, which scientists say can directly benefit mental health.
One line of reasoning used to argue oats aren't healthy is that eating them can lead to spikes in blood sugar (glucose). This seems to be linked to the rising use of glucose monitors by people who don't have diabetes.
“If you can't have cow's milk, soy milk and rice milk are often the healthiest milk for gut health – especially for people with celiac disease, an autoimmune disease that can cause inflammation,” Park said.
Oat Milk Oat milk is another IBS-friendly option due to its creaminess. However be mindful that in larger quantities oat milk can become rich in fermentable carbohydrates. Limit to a 140ml serving. Coconut Milk Coconut milk is also a great option which can be used both in booking and baking.
While oats themselves have anti-inflammatory properties, the additives in processed oat milk might trigger inflammation in some individuals. Many store-bought oat milks contain preservatives , stabilizers , and sweeteners that could potentially cause issues for those with sensitivities.
Wellness influencers are ditching almond and oat milks and switching back to dairy amid health concerns. The plant-based milks were once touted as a low calorie, low-fat alternative but studies have indicated they are nutritionally inferior to the stuff from cows.
Even if you aren't allergic to oats, many times, oats are processed in the same plants that process wheat and other glutens. This would make oat milk off-limits if you follow a gluten-free diet, such as if you are gluten intolerant or have celiac disease, reducing your risk of cross-contamination.
Here are six estrogen-positive foods to avoid:
Almond. Almond milk is pretty simple—it comes from soaked almonds. It's also hormone-free and in unsweetened form, contains less saturated fat and calories than milk, explains Patel—which makes it one of the safer options in the context of hormonal disruption.
People are quitting oat milk due to concerns about highly processed ingredients like seed oils and emulsifiers, its impact on blood sugar (due to broken-down starches and added sugars), low protein content, potential inflammation, and gut health issues, with some wellness influencers shifting to cow's milk or other alternatives like almond or soy. The trend reflects a growing awareness that while convenient, many commercial oat milks aren't as "natural" or nutritionally complete as initially perceived, leading consumers to seek whole foods or dairy for better protein and fat balance.
“Oat milk is mental fuel. Its beta-glucan keeps energy steady, while prebiotic fibre supports a healthier brain via your gut.” According to Willa's Kitchen, prebiotic fibres like beta-glucan feed the microbiome, which affects your mood, cognition, and stress response.
Oatly struggles with decline in plant-based dairy: “People are tired of climate doom stories” Plant-based milk is losing popularity in the United States. Oatly is sounding the alarm, concerned that Europe is heading in the same direction: greenwashing and “doom and gloom” are turning consumers off.
Rashes, hives, or atopic dermatitis are common symptoms of oat allergies. These include bloating, stomach pain, or diarrhea, which can be caused by oat milk intolerance or sensitivity. Wheezing, coughing, or difficulty breathing may occur in severe cases.
Oat intolerance manifests as digestive issues often within a few hours of consumption. Symptoms include bloating, gas, diarrhea, stomach cramps, and nausea. Some individuals might also experience fatigue, joint pain, and skin rashes. It's essential to differentiate this from celiac disease or wheat allergy.
“Someone might consider using oat milk instead of cow's milk if they have been experiencing some GI issues such as diarrhea, gas or bloating. Just be aware that some oat milks may contain gums or emulsifiers that can cause GI irritations as well,” says Lara Clevenger, RDN.
Soda and fruit, energy, and sport drinks
HFCS drives inflammation and may cause intestinal malabsorption issues and gut dysbiosis (an imbalance in the gut microbiome). And remember: Artificially sweetened sodas (the “diet” versions) contain aspartame, which is also problematic.
A few milk options are suitable for IBS. They include lactose-free, goat's, unsweetened almond, and unsweetened hemp milk.
avoid foods that are hard to digest (like cabbage, broccoli, cauliflower, brussels sprouts, beans and onions) avoid products containing a sweetener called sorbitol. ask a pharmacist about medicines that can help, like Buscopan or peppermint oil.