SFD ZMA + B6 is ideal for everyone, who focuses on healthy lifestyle. Testosterone Boosters. Sports Nutrition. Magnesium together with vitamin B6 contributes to The addition of Vitamin B6 increases the absorption of magnesium from the digestive tract by 20-40%, facilitating its transport into the body's cells and maintaining its intracellular reserves at optimal levels (it has an antispasmodic effect).