I need to gain weight. i an 27 years old vegetarian. can i use nutrigain powder?

Why?: If you are otherwise healthy, being skinny is not a bad thing. You may use the powder, however eating a mixed vegetarian diet that includes milk and milk products will supply all the nutrients you need. You may take vitamin D3 supplement at a dose of 1000-2000 units/day. With age, you will gain weight and look back fondly at these days when you could eat and not gain weight