The Body Vitamin C delivers a clinical concentration of Vitamin C – THD Ascorbate – to the body. Best in Vitamin C – THD Ascorbate is a stable, oil-soluble liquid. THD Ascorbate works on both the outer and deeper layers of skin making it highly effective. Due to a neutral pH – THD Ascorbate is safe for sensitive skin. The Body Vitamin C is dermatologist-tested, hypoallergenic and non-comedogenic.