Re: preventative of what?

The people of this forum have done a TREMENDOUS amount of work (unpaid, all done on a voluntary basis for the good of mankind) to answer questions such as yours.

If you had actually read the FAQ's in full, and read the BSA, RN, and R posts to any kind of degree, then you would know that the answer is different for many people. People want others to just answer this question for them, "just tell me what to do, and when it doesn't work, I can blame YOU" -

Are you one of those people?