Casein & Gluten Free Hypoallergenic Dietary Supplement Many clinicians are now utilizing higher doses of Trimethylglycine (TMG). For individuals whose doctors recommend these higher dosages, Kirkman offers a 500 mg TMG capsule that will minimize the number of capsules needed to meet the physicians’ recommended intake. This is a hypoallergenic formulation, specially designed for individuals with special requirements and sensitivities.