WHAT IS GUK? GUK is a high-quality supplement that provides a unique formula that combines calcium phosphate, vitamin C and vitamin B1. The vitamin C within GUK is from pure ascorbic acid, which provides high-levels of natural vitamin C. Thiamine (vitamin B1) is then mixed carefully with the vitamin c already in the supplement to create a perfectly blended health supplement. WHAT DOES GUK DO? Vitamin B1 contributes to normal energy-yielding metabolism Vitamin B1 contributes to normal functioning of the nervous system Vitamin B1 contributes to normal psychological function Vitamin B1 contributes to the normal function of the heart Vitamin C contributes to maintain the normal function of the immune system during and after intense physical exercise Vitamin C contributes to normal collagen formation for the normal function of blood vessels, cartilage, bones, gums, skin and teeth Vitamin C contributes to normal energy-yielding metabolism. Vitamin C contributes to normal functioning of the nervous system. Vitamin C contributes to normal psychological function Vitamin C contributes to the protection of cells from oxidative stress Vitamin C contributes to the reduction of tiredness and fatigue Vitamin C contributes to the regeneration of the reduced form of vitamin E Vitamin C increases iron absorption