This is a good amino acid product, especially when you buy it in the 400 capsule bottle because it is a better value than the 200 capsule bottle. The only thing about these amino acids capsules is that they do not really contain as many aminos as you would want. You really need to take about 8 capsules instead of the recommended dosage of 4 capsules. So, instead of 100 servings that makes one bottle contain about 50 servings. Besides that, it is a good product.