I went on a training course on Monday where evidence was presented about the benefits of certain nutrients.
The strongest evidence was for Vitamin D and Vitamin B3 (also known as niacin, nicotinamide and niacinamide)

There is evidence that Vitamin D reduces not only your risk of melanoma but it also reduces the risk of the most common types of cancer.
The problem is we all wear SPF to prevent us from making our own Vitamin D to protect ourselves from skin cancer!

Vitamin B3 also offer protection for those who are prone to certain skin cancers.
According to a study in the Journal of Cosmetic Dermatology, Vitamin B3 also leads to an improvement in the skin’s barrier function and an improvement in the skin’s moisture content. It improves the surface structure, smooths out wrinkles and inhibits photocarcinogenesis.
A 2003 study on 50 women aged 40 to 60 added niacinamide at 5% to a moisturizer and found “significant improvements” to fine lines, wrinkles, hyperpigmentation spots, texture, and red blotchiness.

Vitamin C and A also are shown to have a beneficial effect on cancer incidence.

It was an eye-opener, Vitamins do Prevent Cancer and Ageing.

I always do my best to have a healthy nutritious diet but now I am back on my Skinade as well as it contains everything mentioned in the talk except vitamin D.
I must remember to pick up a vitamin D supplement tomorrow as I intend to continue using my SPF.