as the name implies, extreme combination of ingredients. Hard Gainer ExtremeNotably this gainer contains the most rapidly absorbed protein; whey hydrolysate and the slowest digestible protein; calcium casseinate. The blend will keep shuttling muscle building amino acids into the bloodstream for at least 8 hours after consumption. Hard Gainer Extreme contains only fast-acting carbohydrates which can be endured only by the toughest hard gainers. In the ingredient list you will also find fibre and, similarly to Total Gainer, extra sources of dietary fat. If your metabolism is on a slow side, you might re-consider other options rather than this calorie-bomb.