We generally tend to isolate the gut for digestion and the heart for circulation, as though they are completely separate . However, research of the past decade suggests otherwise. The trillions of microbes living in your digestive tract support so many vital processes within the body, and displays an effect on inflammation, cholesterol and blood pressure markers. Now scientists are beginning to talk about a gut heart axis in the same way they talk about the gut brain axis. Here is what that connection looks like and how to support both ends of it.
What is the gut microbiome?
Your gut is home to trillions of bacteria and other microorganisms, collectively called the gut microbiome. They are not passive passengers. Some help break down the parts of your food that human enzymes cannot handle, produce vitamins including several B vitamins and vitamin K, train your immune system, and maintain the lining that separates the contents of your gut from your bloodstream.
The mix of species you carry is influenced daily by what we eat, movement, sleep quality, medicines consumed and one of the biggest contributors being stress. A diverse microbiome, fed by a wide range of plant foods, is generally considered a marker of good gut health.
How does the gut influence the heart?
The clearest link runs through inflammation. When the gut lining is working well, it acts as a selective barrier. When it is not, fragments of bacteria and other compounds can pass into the bloodstream more readily, prompting a low-grade inflammatory response. Chronic low-grade inflammation is one of the processes involved in the stiffening and narrowing of arteries over time.
There is also a more direct chemical route. Certain gut bacteria convert nutrients found in red meat, egg yolks and some supplements into a compound called TMAO.
Higher circulating TMAO has been associated with cardiovascular risk in several studies, although researchers are determining the correlation and the impact of the relationship it may cause. What remains true is that the composition of your microbiome influences how much TMAO you produce from the same meal.
Finally, gut bacteria ferment dietary fibre into short chain fatty acids such as butyrate, which nourish the cells lining the colon, and appear to play a part in regulating inflammation and blood pressure. This forms part of the long-standing advice to consume more fibre for heart health.
What does the research say about probiotics and heart health?
Probiotics are live microorganisms that may offer a health benefit when taken in adequate amounts (NIH). Most of the evidence relates to digestive health, and the effects tend to be specific to particular strains rather than to probiotics as a category (NIH). Some studies have looked at whether certain strains influence cholesterol levels or blood pressure, with mixed but interesting results, and this remains an active area of research rather than a settled question.
What that means in practice is sensible expectations. A probiotic may support a healthy gut environment, and a healthy gut environment is part of the wider picture that includes cardiovascular wellness. FoodGrown Broad Spectrum Probiotic 10-Strain offers a broad 10 strain coverage, FoodGrown Spore-Based Probiotics uses spore forming strains chosen for their resilience in withstanding stomach acid, and FoodGrown Pre + Pro + Postbiotics combines prebiotics to feed your existing bacteria, probiotics to add to them and postbiotics, the beneficial compounds bacteria produce.
How do you support your gut and heart together?
Fibre is one of the single most useful levers, because it feeds the bacteria that produce short chain fatty acids and supports healthy cholesterol levels simultaneously. Aim for a variety of whole-foods rather than volume alone: legumes, oats, barley, vegetables, fruit, nuts and seeds all count, and eating around thirty different plant foods a week is a practical target many dietitians suggest.
Add fermented foods such as yoghurt, kefir, amasi and sauerkraut, which introduce live cultures alongside the fibre that feeds them. Keep ultra-processed food and excess salt down, prioritize movement, and protect your sleep, since both physical activity and rest influence the diversity of your microbiome. Where digestion feels sluggish, Full Spectrum Digestive Enzymes supports the breakdown of proteins, fats and carbohydrates, and Colon Balance is formulated for the lower digestive tract. On the cardiovascular side, Omega-3 remains a sensible daily addition if oily fish is rare in your week. Explore the Digestion & GI Health range to find the support that suits you.
Why choose Food Grown vitamins?
FoodGrown vitamins are made from real food and nature-based sources, so that your body can recognise and absorb them the way it would nutrients from a meal. Every product is non GMO, free from artificial fillers and sustainably sourced, and the range is available at Dis-Chem nationwide. It is the way vitamins should be: real food, real nutrients, as nature intended.
Frequently Asked Questions
What is the gut-heart axis?
It is the name researchers use for the two-way relationship between the gut microbiome and the cardiovascular system. Gut bacteria influence inflammation, the production of compounds such as TMAO and short chain fatty acids, and the way the body handles cholesterol, all of which relate to heart health.
Can probiotics improve heart health?
Research into probiotics, and cardiovascular markers such as cholesterol and blood pressure is ongoing and results so far are promising. Probiotics are best thought of as support for a healthy gut environment rather than as a heart treatment.
What is TMAO?
TMAO is a compound produced when certain gut bacteria process nutrients found in red meat, egg yolks and some supplements. Higher levels have been associated with cardiovascular risk in several studies, and your microbiome composition affects how much you produce.
How much fibre should I eat a day?
Most guidelines suggest around 25 to 30 g a day for adults, and most people fall well short. Legumes, oats, vegetables, fruit, nuts and seeds are the easiest ways to close the gap.
What is the difference between prebiotics, probiotics and postbiotics?
Prebiotics are fibres that feed the beneficial bacteria you already have. Probiotics are live beneficial bacteria you add. Postbiotics are the beneficial compounds those bacteria produce. A combined formula covers all three.
Disclaimer
This blog is intended for general informational and educational purposes only and does not constitute medical advice. The content is not intended to diagnose, treat, cure, or prevent any disease or health condition. Always consult a qualified healthcare professional before starting any new supplement regimen, particularly if you are pregnant, breastfeeding, have a chronic medical condition, or are currently taking prescription medication. Individual results may vary. FoodGrown products are dietary supplements and are not intended to replace a balanced diet or professional medical care.
