Review Source Naturals 5 HTP is one of the many sources I've tried. It was best tolerated at night a few hours after eating, but made me sick to my stomach if I took it before eating in the mornings. The biggest downside to the product is that it is in 50mg capsules instead of 100mg capsules. I have heard great things about Lidtke's l-Tryptophan as well, but have not tried it.
I would definately use Source Natural's 5-HTP is available to me, but prefer LifeLink and Solaray's.
Review This is the best product in controlling the ph balance of your body.
It is simple to maintain. It provides the tabs to monitor. Excellent product!