Shapiro SS, Saliou C (October 2001). "Role of vitamins in skin care". Nutrition. 17 (10): 839–844. doi: 10.1016/S0899-9007(01)00660-8. PMID 11684391. Bennett H (25 May 2014). "Ever wondered about your skin?". The Washington Post . Retrieved 27 October 2014. This can cause clusters of itchy, red or brown, fluid-filled blisters in various stages of healing all over the body.

Several scientific studies confirmed that changes in baseline nutritional status affects skin condition. This condition causes a red, painful, fluid-filled blister that appears near the mouth and lips. People with lighter skin may notice more redness than those with darker skin. Quit smoking and using tobacco products. Nicotine and other chemicals in cigarettes and electronic cigarettes age skin faster.Yousef H, Alhajj M, Sharma S. Anatomy, skin (integument), epidermis. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023. Yousef H, Alhajj M, Sharma S (2023). "Anatomy, Skin (Integument), Epidermis". StatPearls. Treasure Island (FL): StatPearls Publishing. PMID 29262154 . Retrieved 28 September 2023. The skin has up to seven layers of ectodermal tissue and guards the underlying muscles, bones, ligaments and internal organs. [8] The epidermis is divided into several layers, where cells are formed through mitosis at the innermost layers. They move up the strata changing shape and composition as they differentiate and become filled with keratin. After reaching the top layer stratum corneum they are eventually 'sloughed off', or desquamated. This process is called keratinization and takes place within weeks. Moisturizing. This is recommended even for those who have oily skin. There are plenty of moisturizers on the market that are oil-free.

Control of evaporation: the skin provides a relatively dry and semi-impermeable barrier to reduce fluid loss. [4] Betts, J. Gordon; etal. (2022). Anatomy and Physiology 2e. OpenStax. p.164. ISBN 978-1-711494-06-7. The hair follicles may look darker than the surrounding skin on darker skin. They’ll usually look red or purple on lighter skin.Keratinocytes are the major cells, constituting 95% of the epidermis, [11] while Merkel cells, melanocytes and Langerhans cells are also present. The epidermis can be further subdivided into the following strata or layers (beginning with the outermost layer): [12]

Water resistance: The skin acts as a water-resistant barrier so essential nutrients are not washed out of the body. [35] Collagen is found in the dermis and is the most abundant protein in the skin, making up 75% of this organ. This is also your fountain of youth. It's responsible for warding off wrinkles and fine lines. Over time, environmental factors and aging diminish your body's ability to produce collagen and can also break down existing collagen. Your Skin and Elastin Also located within the reticular region are the roots of the hairs, sebaceous glands, sweat glands, receptors, nails, and blood vessels. The epidermis contains no blood vessels, and cells in the deepest layers are nourished by diffusion from blood capillaries extending to the upper layers of the dermis.Structurally, the ducts of the granular gland initially maintain a cylindrical shape. When the ducts mature and fill with fluid, the base of the ducts become swollen due to the pressure from the inside. This causes the epidermal layer to form a pit like opening on the surface of the duct in which the inner fluid will be secreted in an upwards fashion. [24] Brown TM, Krishnamurthy K. Histology, Dermis. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023. Sunscreen . This is probably the most important thing that you can do for your skin. Even in the winter and on cloudy days, you should put sunscreen on every day. This should be done even if you are not outside much. A sunscreen that says “broad spectrum” (or says it protects against “UVA and UVB”) with an SPF of 30 or higher is necessary. Limiting your time in the sun, especially between the hours of 10 a.m. and 4 p.m., and wearing protective clothing, such as a long-sleeved shirt, pants, and a wide-brimmed hat, are also recommended. It can cause dome-like, pink or red, shiny, and pearly areas that may have a sunk-in center, like a crater. For people with dark skin, it might appear darker and less pearly. a b Proksch E, Brandner JM, Jensen JM (2008). "The skin: an indispensable barrier". Exp Dermatol. 17 (12): 1063–1072. doi: 10.1111/j.1600-0625.2008.00786.x. PMID 19043850. S2CID 31353914.