Here are some studies about nutrition and skin health:

Enhancing Skin Health: By Oral Administration of Natural Compounds and Minerals with Implications to the Dermal Microbiome (2018)

Note: Comprehensive overview explaining the roles of diet-derived collagen, ceramides, carotenoids, astaxanthin, CoQ10, colostrum, zinc, and selenium for skin health.


Nutraceuticals: A Review (2018)

Note: Comprehensive article going over the photoprotective effects of certain amino acids, carotenoids, antioxidants, healthy fats, minerals, polyphenols, vitamin C, vitamin E, and botanicals.


Influences of Orally Taken Carotenoid-Rich Curly Kale Extract on Collagen I/Elastin Index of the Skin (2017)

Conclusion: 29 middle-aged women were given a concentrated curly kale extract supplement daily for 10 months and had their skin evaluated at baseline, 5 months, and 10 months for skin carotenoid and collagen 1 levels. At both 5 and 10 months skin collagen levels were increased.


Assessment of Clinical Effects and Safety of an Oral Supplement Based on Marine Protein, Vitamin C, Grape Seed Extract, Zinc, and Tomato Extract in the Improvement of Visible Signs of Skin Aging in Men (2015)

Conclusion: 41 middle-aged men were given a daily oral supplement containing small amounts of fish protein, vitamin C, zinc, grape seed extract, and tomato extract (lycopene) for six months and tested for improvements in skin health. They experienced improvements in sunburns, skin hydration, dermal density, increased skin collagen, and decreased UV photodamage. Subjects also reported improved satisfaction with their appearance. 


Discovering the Link Between Nutrition and Skin Aging (2012)

Note: Comprehensive overview explaining the roles of diet-derived vitamin C, vitamin E, vitamin A, vitamin D, antioxidants, and healthy fats in protecting your skin from photodamage.


Interaction of Mineral Salts with the Skin: A Literature Survey (2012)

Note: Comprehensive article about the essential role of nutritional minerals in skin health maintenance and photodamage prevention.


The Role of Phytonutrients in Skin Health (2010)

Note:  In-depth article on the role of micronutrients in protection from UV exposure.


A Protective Effect of the Mediterranean Diet for Cutaneous Melanoma (2008)

Conclusion: An Italian hospital evaluated 304 melanoma skin cancer patients and 305 matched controls on their lifestyles, medical history, diets, and sun exposure history. Researchers found that those in the control group tended to have much healthier diets and that fish, seafood, tea, fruits, vegetables, nuts, and fresh herbs reduce the risk of developing melanoma.


Nutritional Protection Against Skin Damage From Sunlight (2004)

Note: Extremely in-depth article on the role of micronutrients in protection from UV exposure.


Nutritional Skin Care: Health Effects of Micronutrients and Fatty Acids.(2001)

Note: Article covering how consuming vitamin E, vitamin C, carotenoids, polyunsaturated fats, and fish oil protect your skin from photodamage.


Vitamin Supplementation and Reduced Risk of Basal Cell Carcinoma (1994)

Conclusion: 131 basal cell carcinoma skin cancer patients and 200 cancer-free controls were evaluated for personal use of vitamin supplements. The skin cancer patients had a lower use of vitamin supplements. After controlling for many variables, including lifetime severe sunburns, researchers concluded that use of vitamin supplements significantly reduces the risk of developing BCC skin cancer.


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