The sports supplement market offers a huge range of post-workout products, and beyond what they're supposed to do for performance or recovery, a lot of them have specific effects on your gut worth knowing about.
Whey protein concentrate carries some leftover lactose, which can cause discomfort for people with lactose sensitivity, while whey isolate, more processed and lower in lactose, is often better tolerated. Plant-based protein powders, usually blends of pea, rice, or hemp protein, are generally well tolerated but can occasionally cause bloating in sensitive people.
Creatine, one of the most well-researched sports supplements, can cause stomach discomfort in some people, particularly at higher single doses. Splitting your daily dose across two smaller servings instead of one big one, and taking it with food, tends to ease this for people who get it.
A lot of pre-workout formulas carry high doses of caffeine alongside other stimulants, and the gut-stimulating effects of high-dose caffeine apply here too, sometimes even more given how concentrated some pre-workout doses are. Some formulas also include ingredients that cause their own distinct stomach sensations in certain people.
Like with dietary changes generally, trying new supplements one at a time rather than several at once makes it a lot easier to figure out which product is actually responsible if you get discomfort.
If protein powder is causing discomfort, try switching from concentrate to isolate or to a plant-based option and see if it helps. If creatine causes upset, split your dose across two smaller servings with food. And whenever you try a new supplement, give it a week or two on its own before adding another, so any reaction can be clearly traced back to what caused it.
This content is for educational purposes only and is not a substitute for professional medical advice.