https://www.healthline.com/health/psyllium-health-benefits I read a lot how healthy it is to have fiber, and psyllium seeds are a good example. Taking more than the recommended dosage can lead to bloating, constipation or diarrhoea. However, I see no information on any (side)effects from consuming huge amounts over years? In the link above it says "Follow all product instructions carefully. Don’t take any more than the recommended dosage unless your doctor tells you otherwise." No more info. Besides, can taking a fiber supplement together with an unhealthy meal prevent some of the meal's uptake?