1. Maggini, S., Beveridge, S., & Suter, M. (2012). A combination of high-dose vitamin C plus zinc for the common cold. Journal of International Medical Research, 40(1), 28-42.
2. Johnston, C. S., Corte, C., & Swan, P. D. (2006). Marginal vitamin C status is associated with reduced fat oxidation during submaximal exercise in young adults. Nutrition & Metabolism, 3(1), 35.
3. Singh, M., & Das, R. R. (2011). Zinc for the common cold. The Cochrane Library.
4. Phillips, C. L., Combs, S. B., & Pinnell, S. R. (1994). Effects of ascorbic acid on proliferation and collagen synthesis in relation to the donor age of human dermal fibroblasts. Journal of Investigative Dermatology, 103(2), 228-232.
5. Geesin, J. C., Darr, D., Kaufman, R., Murad, S., & Pinnell, S. R. (1988). Ascorbic acid specifically increases type I and type III procollagen messenger RNA levels in human skin fibroblasts. Journal of Investigative Dermatology, 90(4), 420-424.
6. Jacob, R. A., & Sotoudeh, G. (2002). Vitamin C function and status in chronic disease. Nutrition in clinical care, 5(2), 66-74.
7. Hemilä, H. (2013). Vitamin C may alleviate exercise-induced bronchoconstriction: a meta-analysis. BMJ open, 3(6), e002416.
8. Age-Related Eye Disease Study Research Group. (2001). A randomized, placebo-controlled, clinical trial of high-dose supplementation with vitamins C and E and beta carotene for age-related cataract and vision loss: AREDS report no. 9. Archives of Ophthalmology, 119(10), 1439.
9. Stewart, M. S., Cameron, G. S., & Pence, B. C. (1996). Antioxidant nutrients protect against UVB-induced oxidative damage to DNA of mouse keratinocytes in culture. Journal of Investigative Dermatology, 106(5), 1086-1089.
10. Tebbe, B., Wu, S., Geilen, C. C., Eberle, J., Kodelja, V., & Orfanos, C. E. (1997). L-ascorbic acid inhibits UVA-induced lipid peroxidation and secretion of IL-1α and IL-6 in cultured human keratinocytes in vitro. Journal of investigative dermatology, 108(3), 302-306.
11. Duarte, T. L., Cooke, M. S., & Jones, G. D. (2009). Gene expression profiling reveals new protective roles for vitamin C in human skin cells. Free Radical Biology and Medicine, 46(1), 78-87.