After our analysis, we came to the conclusion. MET-Rx Whey Protein takes first place in this comparison and gains 6.9 VSR. Its competitor 21st Century Whey Protein gains 7.6 VSR. The enormous gap in rating was affected in the first place by the price, the cost of 25 grams of pure protein of MET-Rx Whey Protein is $ 0.98 as against $ 0.94 of 21st Century Whey Protein. The serving of MET-Rx Whey Protein contains 23 grams protein as against 20 grams in one 21st Century Whey Protein serving. At the same time, a serving of MET-Rx Whey Protein costs $ 0.90, and a serving of 21st Century Whey Protein costs $ 0.75.
The MET-Rx Whey Protein composition contains minerals in an amount of 5 as against 8 in 21st Century Whey Protein.
MET-Rx Whey Protein is available in 2 flavors. 21st Century releases 3 flavors of Whey Protein.
MET-Rx Whey Protein has just one size, 5 lb. 21st Century Whey Protein is produced in 3 sizes.
We recommend buying 21st Century Whey Protein.