Rhodiola rosea is sold for stress and fatigue as an adaptogen.
Calculator Official intake Study doses Best form Safety Sources
This is not an essential nutrient, so there is no official daily intake. Only study doses are shown.
These are doses tested in research, not personal advice. Some exceed the upper limit because they were short courses or given under medical care.
No single dose
A systematic review of 11 trials found mixed results: 2 of 6 trials on physical fatigue and 3 of 5 on mental fatigue reported benefit. All had a high or unclear risk of bias.
No best form
Why: Trials used different standardised extracts, so no single dose is established.
Not a normal food.
Little is known; ask your doctor if you take antidepressants or diabetes medicines.
Generally well tolerated in short trials.
Pregnant, breastfeeding, on medication, or managing a health condition? Check with a doctor or pharmacist before starting a supplement.
Values checked: November 12, 2026.