Your Article is very informative and useful. But there are some simple tested methods for weight gain/loss/maintenance. Herbalife nutritional shakes/supplement with normal meals help in weight gain. With meal replacement, one can lose weight. It is 25 years old company with more than 400 lakh users in 58 countries. No gym/exercise/starving is involved. The products are tested and tried and approved by these countries. Just food supplements. High energy levels and wellness is achieved.