How much vitamin C you need per day depends on your age, sex, pregnancy and lactation status, and if you smoke. Here are the guidelines and general limits.

When it comes to skincare, price doesn’t equal performance. These editor-tested picks hydrate, protect the skin barrier, and ...

We sat down with the dermatologist, formulator, and founder of Skin Remedy, Dr. Muneeb Shah to teach us all about dark spots, ...

Looking for the best biotin supplement? We reviewed nine RD-approved options that support hair, skin, and nails. See our top picks and expert-backed recommendations.

We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rory Evans Rory Evans is a writer focused on skin-care and beauty products.

Walk down any skincare aisle, and you’ll see vitamin C and vitamin E everywhere—serums, oils, moisturizers, you name it. They’re both often credited for helping skin look its best, but when it comes ...

Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content. Vitamin C and vitamin D both support immune function in ...

Collagen provides structural building blocks for the skin, while vitamin C ensures those fibers form correctly and supports immune function. A practical daily combination is 2.5 to 10 grams of ...

If you’ve ever been told to eat your carrots for better eyesight, you’ve already met vitamin A’s most famous claim to fame. But this nutrient is far more than vision insurance. “Yes, vitamin A is ...

Vitamin C (ascorbic acid) is widely promoted for supporting collagen production and skin health, yet little is known about how oral intake changes dermal or epidermal ascorbate concentrations. A new ...

A new study from researchers at the University of Otago, Faculty of Medicine—Christchurch Ōtautahi, has found that collagen production and skin renewal directly respond to the amount of vitamin C we ...