Does Drinking Knox Gelatin Help With Peeling Nails?

Some people swear by drinking Knox gelatin to help support nail health, particularly peeling nails, but evidence of such benefits is anecdotal at best.
The best way to tackle brittle, peeling nails is to keep them dry, use hand protection when working with chemicals and household cleaners, and go easy on the manicures, says the American Osteopathic College of Dermatology (AOCD).
Foods for Nail Health
Nutritional deficiencies rarely cause brittle, peeling nails, says the AOCD. However, eating a healthy, balanced diet can help boost overall nail health.
It’s important to eat a variety of fruits, vegetables, whole grains, lean proteins, and quality fat sources to get the vitamins, minerals, and other nutrients the body needs to function optimally.
Carbohydrates, healthy fats, iron, protein, and vitamins A, D, and E are particularly helpful for nail health, notes Mayo Clinic Health System.
While gelatin does contain some protein, foods such as fish, nuts, seeds, and eggs do a more effective job of providing high-quality protein alongside additional nutrients needed for healthy nails.
Expert Nail Care Tips
According to Mayo Clinic, external factors, such as repeatedly getting nails wet, more frequently cause peeling nails. Washing your hands often and doing household chores with chemical-based cleaners can also make nails brittle and dry.
Instead of prioritizing gelatin consumption, the AOCD says to invest in a good moisturizer that contains lanolin or alpha-hydroxy acids. Massage the moisturizer into your nails and cuticles in addition to your skin.
You can also protect your nails by wearing cotton-lined rubber gloves when doing housework to limit their exposure to chemicals and cleaners and avoid overdrying, says Mayo Clinic.
It’s also helpful to limit the number of times you change your nail polish. Use acetone-free polish remover when you do, recommends the AOCD.
Better Nail Supplements
According to Mayo Clinic, ask your doctor about taking a high-quality biotin supplement if you find your diet isn’t supplying enough and you’re experiencing peeling nails.
Biotin, or vitamin B7, is a water-soluble vitamin and part of the B vitamin complex that supports healthy skin, eyes, and nails, says the Harvard T.H. Chan School of Public Health.
Limited research supports biotin supplementation for brittle nails. It can also take months to notice results, reports the National Institutes of Health.
Consult your healthcare provider if you’re interested in biotin supplementation for healthy nail support. While no evidence suggests that biotin interacts with any medications, it’s always best to talk to your doctor before adding a dietary supplement to your wellness regimen.
- American Osteopathic College of Dermatology: "Brittle Splitting Nails"
- Mayo Clinic Health System: "What You Eat Promotes Radiant Hair, Skin and Nails Naturally"
- Nutritionix: "Gelatin Powder"
- Mayo Clinic: "Fingernails: Do's and Don'ts for Healthy Nails"
- Harvard T.H. Chan School of Public Health: "Biotin – Vitamin B7"
- National Institutes of Health Office of Dietary Supplements: "Biotin"

Julie Cunningham, MPH, RDN, LDN, CDCES
Medical Reviewer
Julie Cunningham has been a registered dietitian for more than 25 years. She is a certified diabetes care and education specialist (CDCES) and an international board-certified lactation consultant. She has served as the president of the Foothills Chapter of the North Carolina Dietetics Association (NCDA) and has been a member of the executive board of the NCDA.
Ms. Cunningham received a bachelor's degree from Appalachian State University in North Carolina. She subsequently completed a master's degree in public health nutrition at the University of North Carolina at Chapel Hill.
Ms. Cunningham has worked in women's and children's health, cardiology, and diabetes. She is the author of 30 Days to Tame Type 2 Diabetes, and she has also written for Abbott Nutrition News, Edgepark Medical Health Insights, diaTribe, Babylist, and others.
A resident of beautiful western North Carolina, Cunningham is an avid reader who enjoys yoga, travel, and all things chocolate.
