We use a combination of magnesium bis-glycinate and gluconate in Rho Magnesium because these forms offer optimal absorption and bioavailability. Magnesium bis-glycinate is a highly absorbable form of magnesium that is bound to glycine, an amino acid, which enhances its absorption in the body. Gluconate, on the other hand, is a form of magnesium that is easily absorbed by the body and is gentle on the stomach. Together, these forms ensure that our magnesium supplement is well-tolerated and effectively utilized by the body, providing the maximum benefit to our customers.