ProArgi-9+ contains five essential vitamins: Vitamin C, Vitamin D3, Vitamin K, Vitamin B6 and Vitamin B12. Each plays a vital role in supporting the body’s overall performance. Vitamin C contributes to the normal functioning of the nervous and immune systems while reducing fatigue and contributing to normal psychological function. Vitamin B6 and B12 share a few health benefits with Vitamin C, but also play an important role in normal red blood cell formation and homocysteine metabolism. Vitamin K has a set of its own benefits, playing a key part in maintaining normal bones and blood coagulation.