Integrative Therapeutics' Magtein L-Threonate Plus combines Magtein magnesium L-threonate with Vitamins C and D3. This formulation aims to provide cognitive support. focusing on executive function and short-term memory. Magtein L-threonate. a bioavailable magnesium form. is a key component. contributing to cognitive performance. The inclusion of Vitamins C and D3 complements the magnesium. Notably. Vitamin D3 is included to support magnesium absorption.