Retinol
Also known as: Vitamin A1, All-trans-retinol
Effective Dosage
700-900 mcg daily
✓ What the Science Says
Retinol is a form of vitamin A that is crucial for maintaining healthy vision, skin, and immune function. It has been shown to promote cell turnover and improve skin texture and tone, making it a popular ingredient in skincare products.
✗ What It Doesn't Do
Retinol is often marketed as a miracle cure for all skin issues, including acne and aging, but it does not work for everyone and can cause irritation in some individuals. Claims that it can completely eliminate wrinkles or cure severe skin conditions are exaggerated.
Evidence-Based Benefits
Retinol is a form of vitamin A that is crucial for maintaining healthy vision, skin, and immune function. It has been shown to promote cell turnover and improve skin texture and tone, making it a popular ingredient in skincare products.
Strong EvidenceEffective at: 700-900 mcg daily
Source: auto-research
Absorption & Bioavailability
Good - Retinol is well absorbed when taken orally or applied topically, but absorption can vary based on individual factors.
Red Flags to Watch For
- 🚩 High concentrations may lead to skin irritation or sensitivity
- 🚩 Products claiming instant results or miracle cures should be approached with skepticism
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-03-07