Vitamin A

14 benefits mapped to clinical evidence across supplements.

Benefit Evidence

Main Effects

Skin repair +11-fold

Acne/lesions ↓

Gut permeability ↓0.17→0.50

Strong

1,174,407

Immune markers +13%

+T cells 12%

Strong

298,669

Dark vision +11.8%

Vitamin A status↑

Strong

1,124,806

Skin appearance

Skin clearer, less acne

Wrinkles/pigment improved, irritation lower

Strong

36,297

Vitamin A status + growth

Anemia/mortality −15%

Strong

139,210

Wrinkles/pigment improved

Cancer risk down

+31% photodamage

Strong

37,327

Gut barrier ↓ leakiness

Gut inflammation ↓ infection

Strong

37,657

Lower skin inflammation

-45% MMP-9

Less acne irritation

Strong

14,831

Respiratory comfort

Respiratory infections ↓, BPD ↓

Pneumonia / cough ↓

Hospital stay ↓, FEV1 ↑

Strong

14,657

Thicker, less pigmented skin

Less irritation, better tolerance

Strong

8,909

Oxidation↓; A/E↑

β-carotene↑; retinol↔

Strong

5,893

Hb/retinol ↑

Anemia ↓

Growth/fatigue ↑

Strong

3,406

Skin repair +28 pp

Healing speed improved

Moderate

893

Oxidative stress ↓

Retinoic signaling ↑4x

Weak

56