TMG, sometimes known as betaine, ensures that your NMN supplementation is not wasted. It has other beneficial properties too, including supporting exercise performance and supporting vital organs such as the liver and the heart. Each capsule contains 500mg of trimethylglycine. This product comes with the Do Not Age Quality Guarantee. This means that we guarantee the purity and quality of this product to your door, no matter where you live. All of our products are produced to GMP and ISO9001 standards. Our products are manufactured and stored in cool, dark and dry environments. This product is suitable for vegans.