To be honest a £100 a month isn't alot, if you look at the price of some things. When I was getting to my boxing weight and stripping back I had no supplements, I simply ate good wholesome food and stayed well away from the rubbish, apart from a saturday night treat.

To put it into perspective just look at prisoners in jail, and look at there food, not the best but they still get ripped. I believe in good healthy eating, plenty of water and rest! a rest day is for resting!

So my answer to your question is, no they don,t work mate, but healthy eating does, make sure its plenty of food though and dont expect to get big and strip back at the same time, it doesnt work.