Can you take Vitamin A safely during treatment of UV blood treatment with ozone added?

I am having uv blood treatment with ozone added performed by a qualified doctor who also recommends that I take Vitamin A and Vitamin A suppositories along with ozonized olive oil vaginally. I've researched the suggestions and these could both be viable treatments for my condition but I also found articles about an increase in lung cancer risk and lung tumor size in those taking Vitamin A. I'm not the best at understanding what these studies mean but the theory about why it increases the cancer seems to have something to do with the reaction from the oxygen rich environment in the lungs with the vitamin A creating something that induces cancer. I'm including an excerpt below which explains it, maybe someone brighter than me can understand. "A possible explanation for such a finding is that the oxidative environment of the lung, created by smoke or asbestos exposure, gives rise to unusual carotenoid cleavage products, which are involved in carcinogenesis." Will someone please advise? Should I avoid Vitamin A since I am doing the ozone treatments or should I take the vitamin A instead of doing the ozone treatments? I have endocervical adenocarcinoma in situ. Thanks

Lung cancer

At least ten prospective studies have compared blood retinol levels at baseline among people who subsequently developed lung cancer and those who did not. Only one of those studies found a statistically significant inverse association between serum retinol and lung cancer risk (22). The results of the Beta-Carotene And Retinol Efficacy Trial (CARET) suggest that high-dose supplementation of vitamin A and beta-carotene should be avoided in people at high risk of lung cancer (23). About 9,000 people (smokers and people with asbestos exposure) were assigned a daily regimen of 25,000 IU of retinol and 30 milligrams of beta-carotene, while a similar number of people were assigned a placebo. After four years of follow-up, the incidence of lung cancer was 28% higher in the supplemented group compared to the placebo group. A possible explanation for such a finding is that the oxidative environment of the lung, created by smoke or asbestos exposure, gives rise to unusual carotenoid cleavage products, which are involved in carcinogenesis. Presently, it seems unlikely that increased retinol intake decreases the risk of lung cancer, although the effects of retinol may be different for nonsmokers than for smokers (22).
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