Q. I’ve been advised to use diaper rash ointment containing zinc oxide to keep my horse’s muzzle from getting sunburned while he’s grazing. I’ve been wondering if this would also work to keep me from developing a “horse-woman’s tan.” All of the sunscreens I have tried help me avoid sunburn, but I have brown arms from the edge of my gloves to the edge of the short-sleeved shirts.
A. For decades lifeguards have used white zinc oxide to keep their noses from burning. It blocks both UVA and UVB rays and provides excellent protection.
You could try the diaper rash ointment or get a sunscreen that contains both zinc and titanium. New formulations contain microfine particles that don’t leave a distinctive white color. Human sunscreens can also be used on horses to keep pale skin from burning.