What are the side effects of Vitamin a?

Users most often report overdose, carcinogenic at, cancer risk, increased neurofilament, hair loss. Side effects came up 8 times across 112 reports.

User reports can't establish safety. PubMed lists 533 meta-analyses and 1,109 randomized trials. Talk to a doctor or pharmacist, especially if you take other medication.

Vitamin a side effects

Across 112 first-hand reports, people mentioned a side effect 8 times (about 7 per 100 reports). The most common: overdose, carcinogenic at, cancer risk. User reports show what people notice — they can't tell you whether Vitamin a is safe for you.

Reported side effects

overdose1

carcinogenic at1

cancer risk1

increased neurofilament1

hair loss1

liver damage1

toxicity1

jitteriness1

In their own words

“Vitamin a gives me jitterness, so after taking 233 000iu I couldn't continue.”

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“I take magnesium, vit k, vit a, zinc, by itself; none of the things people recommend change the craziness.”

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“Vitamin A comes in the picture and that it causes hair loss scares the crap out of me.”

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Is Vitamin a safe? What the research covers

AResearch: Strong533 meta-analyses · 1,109 randomized trials on PubMed

J Fr Ophtalmol · 2022

Vitamin intake and glaucoma risk: A systematic review and meta-analysis

Conclusion: The data showed that high-dose intake of vitamins A (OR=0.63, 95%CI [0.53, 0.76]) and B (OR=0.71, 95%CI [0.64, 0.80]) but not vitamins C (OR=0.69, 95%CI [0.48, 1.01]), D (OR=0.90, 95%CI [0.45, 1.83]), or E (OR=0.91, 95%CI [0.71, 1.16]) was associated with a low prevalence of glaucoma. The results of this study demonstrated that high-dose intake of vitamins A and B, but not vitamins C, D, or E, was associated with a low prevalence of glaucoma.