I was able to get a full nights rest using this product. I reviewed the companies Life enhancement website. The formulators all seem to be medical doctors. The idea behind this sleep formula is to use 5-Hydroxytryptophan (5-HTP) and Melatonin, The B5 and B6 vitamins help the 5-HTP to cross the blood brain barrier. 5-HTP is the building block to produce Serotonin and Melatonin. You are essentially giving your brain the nutrients it needs to produce these chemicals. The only flaws I saw in this product is nothing in it is time released. I combined this supplement with iherb's Olympian Labs 10mg time released Melatonin. This seemed to take me past the four hour drop off before I would wake up. Full Disclosure I live two blocks from a very active fire department that provided 3500 24/7 house calls last year. I am not exaggerating when I say they like tooting their own horn.