Compatibility of Pure-Melatonin and Pure MSM

Based on the product information available, there is no stated incompatibility between Pure-Melatonin and Pure MSM (Methylsulfonylmethane).

Pure-Melatonin can be used in formulas with a pH range of 4-10, while Pure MSM is suitable for formulas with a pH range of 3-7. These ranges overlap, suggesting that they can be formulated together within the common pH range (approximately 4-7).

While you mentioned that Pure-Melatonin is not compatible with Zinc PCA, the product descriptions do not explicitly detail this specific incompatibility. However, when combining ingredients, it is always recommended to perform small-scale tests to confirm stability and compatibility in your specific formulation.