It's as simple as that! But if you're following a low-carb diet
, it's possible that not enough L-tryptophan will penetrate your brain, and you could wind up depressed.
So if you get depressed but don't want to eat more carbs, the solution can be as simple as taking supplemental tryptophan so there's more of it to penetrate the brain. Take either 1,500 milligrams twice daily or, if that makes you drowsy (which is rare but possible), take all 3,000 milligrams at bedtime.