Is colon cleansing safe and if so where can I buy a kit?

Well, I am trying to bring my weight down and I am trying to eat healthy and exercise but I also heard that doing a colon cleanser is a good way to get started and to shed of a couple lbs right of the bat. I’m also feeling tired and not so energetic which I thought exercise would help with but it hasn’t so much. I feel I just need a complete body detox or something. So, is there a product I can by at the store or something that would work, is safe, and hopefully won’t have me going to the bathroom all day…( I mean something that I can do in the weekend and if it causes diahrea that it will be over in 2-3 days at the most so I don’t have to worry about it at work) Thanks.

two doctors advised me not to do it most products are sold and made by people with little or no medical training See a dietition or doctor Weight watchers is good you eat regular foods