This one really does help wake up my skin and layers seamlessly with my toner, moisturizer, and sunscreen." Sarah Han, commerce editor More to know Types of vitamin C: L-ascorbic acid (percentage undisclosed), ~5% 3-O-ethyl ascorbic acid Other key ingredients: niacinamide, glutathione, vitamin E, panthenol, allantoin Fragrance-free: yes Best for Dark Spots: Goodal Green Tangerine Vita-C Dark Spot Care Serum Why it's worth it: Many well-made vitamin C serums still use droppers, but an airless pump like the one on Goodal's Green Tangerine Vita-C Dark Spot Care Seruma favorite of Kravebeauty founder, Liah Yoooffers a little extra reassurance
Vigorously wipe the rubber stoppers with an alcohol pad and let them air dry
10.1016/S0165-2427(96)05677-2
More studies in humans need to be done before using long-term as majority of research is in the lab and animals
A total of 107 women aged 4065 years were tested among four different treatment groups that received the following treatments daily: treatment 1 contained 10 g of hydrolyzed fish collagen (HFC) ( n =27), treatment 2 contained 5 g of HFC plus 1.5 g of MSM ( n = 26), treatment 3 contained 10 g of HFC plus 1.5 g of MSM ( n = 27), and treatment 4 was the placebo control ( n = 27)
