What Happens to Your Gut Microbiome on Ozempic?
Evidence that GLP-1 medications disrupt the gut microbiome is limited. A systematic review of 38 studies found only nine conducted in humans, most reporting no change in microbial diversity. The narrower and more defensible point is this: eating substantially less usually means eating less fiber and less variety, and fiber is what feeds the bacteria your digestion depends on.*
GLP-1 Resource Center
What happens to your gut microbiome on Ozempic?
The gut microbiome, the ecosystem of trillions of bacteria involved in digestion, immunity, and increasingly mood, is a reasonable thing to think about during GLP-1 treatment. But the honest answer to this question is more measured than most of what you will read about it.
What the evidence actually shows
A systematic review of 38 studies found only nine carried out in humans, and most of those reported no change in microbial diversity on GLP-1 medications. Its authors concluded that claims of clinically significant microbiome modulation by these medications should be treated circumspectly. We agree, and we do not make those claims. Anyone telling you these drugs damage your microbiome is ahead of the data.
The part that does hold up: what you feed it
The gut microbiome is fed by what you eat, and especially by fiber. A 2025 joint advisory from four professional societies (Mozaffarian et al., Obesity) reported caloric reductions of 16 to 39 percent across the GLP-1 drug class. When intake falls that far and dietary variety narrows, the fiber and substrate reaching your gut bacteria falls with it. Slower transit from delayed gastric emptying also changes the digestive environment. Whether or not the microbiome itself measurably shifts, the bloating, gas, constipation and digestive discomfort many GLP-1 patients experience are real.
What fiber supplementation has been shown to do
The trial evidence on fiber is specific and worth reading carefully. Fiber supplementation has been shown to raise Bifidobacterium, Lactobacillus and faecal butyrate. It has not been shown to raise microbial diversity. That is a narrower result than the marketing around gut health usually implies, and we would rather state it than round it up.*
The TAKE approach
TAKE Flora provides an 800mg blend delivering 40 billion CFU across four strains, La-14, Bl-04, Lp-115 and Lpc-37, with MAKTREK Bi-Pass delivery, a marine polysaccharide system intended to carry cultures through stomach acid.* It also contains 24mg of FOS as a synbiotic component. That is not a dietary prebiotic dose, and Flora is not a prebiotic supplement. Higher culture counts are not in themselves evidence of better outcomes, and we do not present the 40 billion figure as though they were. Flora is made in the USA.
TAKE Flow supplies 3,000mg of psyllium husk per sachet, soluble fiber that reduced food intake tends to leave behind, and is formulated to support digestive regularity.* Take it at least two hours away from any medication. Both products form the core of The Gut Reset.
These statements have not been evaluated by the Food and Drug Administration. TAKE products are not intended to diagnose, treat, cure, or prevent any disease. Individual results vary. Always speak with your healthcare provider about medication side effects or medical concerns.