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Pharmaceutical grade 100% water soluble and virtually tasteless. Supports a healthy immune system, helps reduce the severity of colds, flu, etc. Always follow your health practitioners advice. Click on the following links for additional information. https://www.ncbi.nlm.nih.gov/books/NBK499877/ https://pubmed.ncbi.nlm.nih.gov/8698541/ https://pubmed.ncbi.nlm.nih.gov/35986965/ 1 gm = 1 level 1/4 teaspoon 5 gms = 1 1/4 level 5ml teaspoon 10gms = 2 1/2 level 5ml teaspoon