Brittle nails on a vegan diet: what to know

Nails need regular building materials from the diet, including adequate protein and several vitamins and minerals. A poorly planned or very restrictive vegan pattern may make gaps more likely, while a varied pattern can provide nutrients through beans, lentils, tofu, fortified foods, whole grains, nuts, seeds, vegetables and fruit. Brittle nails may also result from frequent water exposure, cosmetic damage, eczema, psoriasis, thyroid problems or fungal infection. The timing of the nail change and any fatigue, hair change, mouth symptoms or altered appetite are useful clues.

Keep a food record for a few days and discuss it with a clinician or registered dietitian, especially if meals are restricted or weight has changed. Ask whether your vitamin B12 plan and other supplements are suitable; do not add high-dose iron or other products without advice. Eat varied protein-rich foods and use fortified products as directed on their labels. Protect nails with gloves during wet work, moisturize after washing, keep them short and avoid biting, scraping and harsh manicure removal. A clinician may recommend tests when deficiency or another illness is possible.

Book an appointment if brittle nails persist, worsen, or occur with marked tiredness, dizziness, breathlessness, hair thinning, skin changes or unintended weight change. Seek prompt care for a painful, swollen or draining nail, fever, a rapidly changing dark streak, or nail lifting without an obvious injury. Severe weakness, fainting or breathing difficulty needs urgent medical attention.

Could my nail change be nutritional, local irritation, infection or another condition? Does my current vegan meal pattern provide enough protein and key nutrients? Which tests are appropriate? Should I change any supplement, and what nail-care steps should I follow?