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The British Heart Foundation (BHF) issued a statement on Friday, March 27, 2026 warning about the hidden dangers to heart health that certain popular gut-friendly foods and drinks could pose. Some of the foods and drinks listed by the BHF included, kimchi, sauerkraut, kombucha, and fruit smoothies. Cardiology dietitian Michelle Routhenstein unpicks the BHF’s warning, and explains what to be mindful of when looking for a diet that protects both the gut and heart health. On Friday, March 27, 2026, the British Heart Foundation (BHF) issued a warning about the potential hidden dangers to cardiovascular health posed by some popular foods and drinks with a reputation for being good for the gut. The BHF lists kimchi, sauerkraut, fruit yoghurts, kombucha, and smoothies as products that we may want to be wary of if we are mindful of our heart health. The warning has come as a surprise to many, given that most of these foods and drinks have been linked to a wide array of health benefits over the years.

A recent study even suggested that a probiotic derived from kimchi may help parse certain nanoplastics out of the body. But what did the BHF actually claim about these foods, and what should we know about their risks and benefits for gut and heart health? Michelle Routhenstein, MS, RD, CDCES, CDN, a cardiology dietitian and owner of Entirely Nourished, spoke to Medical News Today to lay down the facts. What did the BHF actually claim about fermented foods and drinks? While the BHF statement highlighted the many benefits of the foods and drinks listed, it made some specific points about how various ingredients often added to those food items could impact cardiovascular health. Specifically, it warned that shop-bought versions of kimchi and sauerkraut can have a high quantity of added salt, which has been linked to high blood pressure (hypertension) and related cardiovascular problems. Similarly, it noted that store-bought kombucha can be high in added sugar, which has been linked to a significant increase in risk for cardiovascular diseases.

They issued a similar warning for store-bought, fruit-flavored yoghurts. Finally, the BHF cautioned that smoothies, while they can be an easy source of nutrients derived from fruit and veg, have a lower content of fiber than whole, fresh fruit and veg. This means that the natural sugars contained in smoothies can get absorbed in the blood too fast, which can lead to GlycoMode blood sugar formula sugar spikes. While the BHF statement highlighted the many benefits of the foods and drinks listed, it made some specific points about how various ingredients often added to those food items could impact cardiovascular health. Specifically, it warned that shop-bought versions of kimchi and sauerkraut can have a high quantity of added salt, which has been linked to high blood pressure (hypertension) and related cardiovascular problems. Similarly, it noted that store-bought kombucha can be high in added sugar, which has been linked to a significant increase in risk for cardiovascular diseases. They issued a similar warning for store-bought, fruit-flavored yoghurts.

Why should people without diabetes monitor glucose levels? Only 7% of the U.S. Today, more than 120 million Americans have prediabetes or diabetes, and 84% of people with prediabetes don’t even know they have it. What’s more, 9 of the 10 leading causes of death in the U.S. In short, too much glucose and insulin can have serious consequences for anyone. Fortunately, the beauty of striving for better metabolic health is that much of it is in our control. Maintaining stable glucose ranges can improve energy, endurance, memory, mood, and cognitive performance. Levels’ goal is to help you improve metabolic fitness by alerting you to foods and lifestyle choices that negatively impact glucose levels, so you can make healthier, more informed decisions. What is the GlycoMode metabolic support health crisis? Can’t I just look at a glycemic index to see how foods will affect me? Glycemic index (GI) indicates how quickly your body processes the carbohydrates in a particular food, and can be a useful guide to what might cause a glucose spike.

For example, potatoes have a high GI, so they can cause a spike even without added sugar. But how we each respond to food goes beyond the macronutrient composition of the food itself. You might respond well to bananas and have a big spike when you eat rice, while someone else may have the opposite response. Individual differences, such as the composition of our gut microbiome, how well we sleep, exposure to stress, physical activity, and our genetics can all contribute to those unique reactions. The more you know about how your body responds, the easier it becomes to make healthy choices. Why does Levels measure GlycoMode daily glucose support and not insulin? Insulin is a hormone released by the pancreas that allows glucose to move from our blood into our cells, where it can be stored or converted to energy. When glucose is too high too frequently, we produce too much insulin.