The validity of this article is questioned, but still interesting, nonetheless.
"Vitamin A is such a basic metabolic factor, in the brain and endocrine glands, liver and kidneys, etc., I think it's dangerous to experiment with drugs that interfere with it."
Retinoid Cream Associated With Death In Clinical Trial, But Relationship Does Not Appear Causal
Patients using a cream containing tretinoin, a retinoid commonly used to treat acne and other conditions, appeared more likely to die than those using a placebo in a clinical trial that was halted early as a result, according to a new report. However, evidence does not suggest these excess...
www.sciencedaily.com
"Vitamin A is such a basic metabolic factor, in the brain and endocrine glands, liver and kidneys, etc., I think it's dangerous to experiment with drugs that interfere with it."