I dont know how to prevent constipation though, also interest to find out just in case.:o
As various forumers have found out no one really needs to suffer from constipation.
I think all the suggested solutions work depending on the cause & severity of the problem. The solution I stumbled on is one which fills a deficiency in the body, the lack of essential oils. Old & young can suffer from an imbalance of omega 3,6 & 9.
I suffer from heart problems & diabetes, the documentation I've read point to a lack of omega 3 & too much of the unhealthy trans fats. I used to eat regularly at MacD, KFC, Burger King but now avoid those places like the plague.:o