studies had more than 21,000 I.U. daily. Most of this came from dietary sources, the study authors said.
The researchers noted that increasing use of vitamin A supplements didn’t appear to lower the risk of squamous cell skin cancer.
Vitamin A seemed to be even more protective for people with numerous moles and those who had a blistering sunburn in childhood or adolescence.
The study wasn’t designed to prove a cause-and-effect link, but Cho said that vitamin A works to keep skin cells healthy, and that may be why it’s linked to a lower risk of squamous cell cancers.
But, she added, even if you have a healthy diet full of
