Twinlab Liquid C Citrus -- 16 fl oz

What the brand says

Twinlab's Liquid C is a pleasant tasting liquid formula for more efficient digestion, absorption, assimilation and utilization. Vitamin C is a powerful antioxidant, which supports a healthy immune system and helps fight free radical damage. It also is beneficial in promoting the development of collagen, a key building block for muscles, skin, bone and teeth.