Prebiotic supplements are very useful for those whose lifestyle doesn't allow a proper diet, or for people with conditions that restrict their diet. We need prebiotics in order to maintain a healthy micro-flora, and to allow them to thrive. A weak and sub-populated intestinal flora will lead to serious conditions, many times hard to diagnose. It is believed that in many cases of atopic dermatitis, or other inflammatory conditions, the root cause is a weak intestinal microbiota. There are two ways to strengthen the gut microbiota, and to allow its various populations to grow, to take probiotics orally, (from functional fermented foods, or from supplements), or to feed them with nutrients that stimulates their activity and multiplication.
Prebiotics are foods, or substances that stimulate the activity and growth of good bacteria, (probiotics).