15 May 2015

B3 shown to reduce risk of skin cancer

Australian research indicates that nicotinamide, a form of vitamin B3, can reduce the incidence of non-melanoma skin cancers.


A simple daily vitamin may help prevent the most common types of skin cancer in people at high risk of the disease, according to new research from Australia.

Reducing the cost of skin cancer

A study conducted at the University of Sydney found that nicotinamide, a form of vitamin B3, reduced by 23 percent the incidence of new, non-melanoma skin cancers in people who had at least two of the cancers in the previous five years. The study compared nicotinamide taken as a pill twice daily to a placebo.

Read: Your complete guide to niacin (vitamin B3)

The findings may offer a way to reduce the health burden and cost of skin cancer, the most common form of the disease in fair-skinned people, according to the American Society of Clinical Oncology. The society released the study ahead of its annual meeting.

"It's a cheap vitamin ... one could be generous about starting it early if that's a preference," said Dr Peter Paul Yu, ASCO president and director of cancer research at Palo Alto Medical Foundation.

The major cause of non-melanoma skin cancer is exposure to ultraviolet radiation from the sun, which damages cellular DNA and suppresses the ability of the skin's immune system to eradicate abnormal cells.

"We were looking to counter both pathways," said Diona Damian, professor of dermatology at the University of Sydney and the study's lead author. She said the 386-patient study showed that nicotinamide reduced the risk for both basal cell and squamous cell carcinomas, the most common types of non-melanoma skin cancers.

Very inexpensive

The preventative effect seemed to begin as early as three months after treatment started, but stopped after the patient stopped taking the vitamin, indicating a "need to continue taking tablets for them to be effective," she said.

Damian also emphasised that nicotinamide, easy to obtain and "almost obscenely inexpensive", is not the same as another B vitamin, niacin, that can cause side effects such as headache and low blood pressure.

Read: What is niacin?

The researchers cautioned that people, especially those at high risk of skin cancer, still need to use sun protection and have regular skin cancer screenings.

While squamous and basal cell carcinomas are the most common skin cancers, melanoma is the deadliest.

Damian also said nicotinamide should be used only by people at high risk of skin cancer. "This is not something we would recommend for the general population," she said.

Read more:

Are you at risk of skin cancer?

Skin cancer 'epidemic'

How much niacin do you need?

Image: Vitamin B3 from Shutterstock


Read Health24’s Comments Policy

Comment on this story
Comments have been closed for this article.

Ask the Expert

Cancer expert

CANSA’s purpose is to lead the fight against cancer in South Africa. Its mission is to be the preferred non-profit organisation that enables research, educates the public and provides support to all people affected by cancer. Questions are answered by CANSA’s Head of Health Professor Michael Herbst and Head of Advocacy Magdalene Seguin. For more information, visit

Still have a question?

Get free advice from our panel of experts

The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.

* You must accept our condition

Forum Rules