Excess sodium is known to increase the risk of high blood pressure and heart disease, but dermatologists warn that a salty diet could also accelerate the ageing of skin. According to experts, foods high in salt may leave the skin looking dry or puffy and interfere with collagen production, the protein responsible for keeping it firm and hydrated.
Dr Timothy Tran of Westlake Dermatology explained that while salt is essential for regulating fluid balance, nerve function and muscle contractions, "when consumed in excess, sodium can lead to a host of issues, and the skin is often the first area to reflect these imbalances." Dermatologist Dr Michael Lin added that high blood pressure, which affects nearly half of American adults, can weaken the skin and disrupt collagen production. Dr Tran noted that sodium-induced dehydration and oxidative stress make the skin "more vulnerable to collagen breakdown," resulting in sagging, fine lines and a rough texture.
The cosmetic effects are compounded by the body's response to excess salt. The Cleveland Clinic states that a salt-heavy diet causes the body to retain water, leading to a puffy appearance, while Singapore's Cutis Medical Laser Clinics points out that water is drawn from cells, leaving the skin dry and flaky. Sodium stored in the skin has also been linked to eczema, with more than 31 million Americans affected. Research from San Francisco suggests that each extra gram of daily sodium increases the likelihood of eczema flares by more than 20 percent.
To mitigate these effects, experts recommend limiting ultraprocessed foods such as chips, canned soups, fast food, meats, pickles and bread. Healthier alternatives include nuts, beans, fish and reduced-sodium cheese. Cooking at home, rinsing canned foods — which can remove up to 40 percent of sodium from beans, according to dietitian Amy Davis — and pairing salty meals with potassium-rich foods like bananas can also help counteract water retention.
Maintaining skin health is vital, as it serves as the body's primary barrier. Dr Heidi Kong of the National Institutes of Health said: "The skin provides a barrier to protect the body from invasion by bacteria and other possible environmental hazards." Keeping the skin well-hydrated and moisturised is therefore essential, particularly for those aiming to limit the visible effects of a high-salt diet.
