what is the best vitamin c supplement brand?
['NOW Foods C-1000.', 'Dr. Mercola Liposomal Vitamin C.', "Nature's Way Vitamin C-1000.", "Doctor's Best Vitamin C.", 'Viva Labs Vitamin C.', 'Garden of Life Vitamin Code Raw Vitamin C.', 'Twinlab C-1000 Caps.', "Puritan's Pride Premium C-1000."]