Sentry Manufacturing (a subsidiary of ITO EN, Japan) is one of the premier cGMP certified dietary supplement manufacturers. Our state of the art manufacturing and testing facilities produces only products of the highest quality, made in the US. Housed in a 150,000-sq.ft. facility, Sentry offers comprehensive expertise in formulation and manufacturing of tablets, capsules, and powders. Sentry is at the forefront of compliance using only human grade materials and tested to American Standards.