Vitamin A is important, but high doses can be risky without balancing other fat-soluble vitamins.
Who is behind it
Voices including a former research biochemist, a nutritional sciences PhD and a certified naturopath.
How strong the research is
Backed by some published research, and by what the experts see in practice.
In their words
“When we think about acne, we should be thinking about vitamin A, zinc, B5, and mitochondrial function. Before we think about drugs, that's before we think about retinoids. That's before we think about tetracycling.”
a nutritional sciences PhD
Vitamin A deficiency remains a significant global problem causing blindness, particularly in developing countries with limited food access.
They regulate bile gene expression which influences bile production.
Selenium and vitamin A support metallothionein activity and antioxidant defense.
a certified naturopathsponsoredThese nutrients and glandulars are suggested to nourish and support the thymus.
Vitamin A protects hair from free radicals and deficiency can cause hair dryness and hair loss.
Retinol absorption is up to 40% from animal sources compared to 3% from plants.
a certified naturopathsponsoredRetinol is essential for tissue health and differentiation, and helps suppress cold sores by supporting immune function.
Vitamin A is depleted during long-term illness and UV exposure due to its role in tissue differentiation and immune processes
With care
Some of the minds attach conditions. These are worth reading before you begin.
Retinoic acid derived from vitamin A promotes immune tolerance in the gut, so low vitamin A could contribute to increased gut permeability
Talk it through
Entrain shows what the experts teach, so you can make better decisions with your own clinician. It does not diagnose or prescribe. If something is worrying you, start there.
How this reading was made
Every line here comes from a doctor, scientist or coach speaking publicly, and links to the moment they said it. Entrain listens for where independent experts arrive at the same place on their own, and shows where they part ways. Backed by some published research, and by what the experts see in practice.
Some statements come from sponsored segments or people speaking about their own products. They are marked where they appear and count for less. Last refreshed 23 September 2026.
The research beneath it
- Intranasal vitamin A is beneficial in post-infectious olfactory loss.European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2017
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