5-HTP works in the brain and nervous system by increasing the production of serotonin. Serotonin has the ability to enhance sleep, reduce anxiety as well as improving your mood and increasing the feeling of relaxation. Contains 60 Capsules – 2-3 months worth of capsules You should not take 5-HTP if you are on sleeping medication or anti-depressants. Consult your doctor before adding 5-HTP to your diet.