What can cause vitamin a levels to be high repeatedly in blood tests despite no vitamin a supplement or multivitamin, no acne creams etc etc. normal diet. cannot find the source of the vitamin a excess. thank you?

All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Talk to the doctor who ordered the tests. Having said that, it would have helped had you provide the actual result. High is not helpful. High could be just above the normal limit and would not be meaningful. Wish you good health!