G'day, I would be surprized if zinc oxide is the source of skin irritation. ZnO is the major component of sunscreens applied directly to the skin. The following is from Wikipedia:
"... Zinc oxide is widely used to treat a variety of other skin conditions, in products such as baby powder and barrier creams to treat diaper rashes, calamine cream, anti-dandruff shampoos, and antiseptic ointments. ... Zinc oxide is added to many food products, e.g., breakfast cereals, as a source of zinc, ... zinc oxide can be used in ointments, creams, and lotions to protect against sunburn and other damage to the skin caused by ultraviolet light (see sunscreen). It is the broadest spectrum UVA and UVB absorber that is approved for use as a sunscreen by the FDA, and is completely photostable. ..."
see: http://en.wikipedia.org/wiki/Zinc_oxide
Peter in Oz
"... Zinc oxide is widely used to treat a variety of other skin conditions, in products such as baby powder and barrier creams to treat diaper rashes, calamine cream, anti-dandruff shampoos, and antiseptic ointments. ... Zinc oxide is added to many food products, e.g., breakfast cereals, as a source of zinc, ... zinc oxide can be used in ointments, creams, and lotions to protect against sunburn and other damage to the skin caused by ultraviolet light (see sunscreen). It is the broadest spectrum UVA and UVB absorber that is approved for use as a sunscreen by the FDA, and is completely photostable. ..."
see: http://en.wikipedia.org/wiki/Zinc_oxide
Peter in Oz




















