Nature’s Way – PMS Vitamin B6 & 5 HTP 418 mg. – 100 Capsules Nature’s Way – PMS Support For Women. Nature’s Way PMS formula provides nutritional support for a woman’s monthly cycle. PMS by Nature’s Way contains a naturally occuring amino acid called 5-HTP (5-Hydroxytryptophan) which is used as an anti-depressant and a sleep aid. 5-HTP causes the body and its muscles to relax. PMS also contains Vitamin B6 which is crucial for the production of trytophan, a safe and effective sleep aid. 5-HTP and Vitamin B6 work together to provide a much needed relaxation period during pre-menstrual syndrome. Using PMS by Nature’s Way can water down the painful symptoms of that monthly nightmare.