TMG Supplements TMG Supplements (Trimethylglycine) or also known as betaine, plays a crucial role in the body’s methylation processes, supporting overall health, energy production, and detoxification. Whether you're looking for TMG powder or TMG capsules, our selection offers advanced formulations that include B-vitamins and choline for enhanced methylation and cognitive support. The perfect pair with our NMN and NR supplements in regulating homocysteine levels.