Supports vision, immune function, and skin health.
Effective Dose
3,000 IU (900 mcg RAE) for adults
Onset
2-4 weeks
Cost
Budget
Cycle
Not typically cycled. Can be taken consistently as needed, especially during winter months or periods of increased stress.
7 things you need to know
What it does
Supports vision, immune function, and skin health.
Worth it?
7.5/10. Vitamin A is essential, especially for those with deficiencies. Supplementation can improve vision, immunity, and skin health. However, most people get enough from their diet, so it's not a universally needed supplement.
How much to take
3,000 IU (900 mcg RAE) for adults
Price
Cheap (under $15/month)
How fast it works
Takes 2 to 4 weeks to notice
Safety
Check if: pregnancy (high doses can cause birth defects), liver disease
What people say
Generally, no immediate noticeable feeling. Over time, improvements in night vision or skin clarity may be observed.
The word 'vitamin' comes from 'vitamine,' coined by biochemist Casimir Funk in 1912, derived from 'vita' (life) and 'amine' (nitrogen-containing organic compound).
"Generally, no immediate noticeable feeling. Over time, improvements in night vision or skin clarity may be observed."
Research backing for this ingredient
Multiple high-quality studies confirm efficacy
350+
Yes
Strong agreement among researchers
Treats night blindness and prevents xerophthalmia
Multiple systematic reviews and WHO guidelines
Reduces mortality in children with measles
Cochrane Meta-analysis of 43 RCTs
Supports skin health (acne and aging)
Various RCTs (mostly involving retinoid derivatives)
"Vitamin A's role in various bodily functions is well-established through extensive research. Deficiency is a significant concern in certain populations, and supplementation effectively addresses it."
Vitamin A is crucial for several bodily functions. Supplementation is most beneficial for those with a deficiency, which can lead to vision problems, weakened immunity, and skin issues. Most people get enough from diet, but certain conditions or diets may necessitate supplementation.
Products below minimum dose are likely ineffective
When
Any time
How
3,000 IU (900 mcg RAE) for adults
Food
Take with a meal containing fat for better absorption.
Noticeable improvements in vision or skin may take several weeks of consistent supplementation, especially if deficient.
Not typically cycled. Can be taken consistently as needed, especially during winter months or periods of increased stress.
Check for specific interactions.
Vitamin A is categorized as a vitamin.
Scientific consensus score: 8/10.
Evidence quality: STRONG.
Add Vitamin A to your stack analyzer or compare it with other ingredients.
Not medical advice. Always consult a healthcare provider.