Guide by goal
Supplements for tiredness
The 6 actives in the library that the quiz considers when your goal is having more energy, ordered by the strength of their evidence, with their reference dose. Their profiles link to 14 studies.
What the evidence says for each
The level of evidence sums up everything known about each active, not just for this goal. What there is specifically for having more energy is in the studies on its profile.
| Active | Evidence | Reference dose | What is known |
|---|---|---|---|
| Active vitamin B complex | Strong | Around 100% of the reference intake of each B vitamin. | Authorised EU claim Vitamins B2, B3, B5, B6, B12 and folate contribute to the reduction of tiredness and fatigue. It helps most when the diet is low in them. |
| Vitamin B12 | Strong | 250–1,000 µg a day (or 2,000–2,500 µg once a week). | Authorised EU claim Vitamin B12 contributes to normal red blood cell formation and to the normal functioning of the nervous system. A vegan diet has no reliable natural sources: supplementing it is not optional. |
| Vitamin C | Strong | 200–500 mg a day. | Authorised EU claim Vitamin C contributes to normal collagen formation for the normal function of skin, increases iron absorption and contributes to the reduction of tiredness and fatigue. |
| Coenzyme Q10 | Promising | 100–200 mg a day. | Its levels fall with age. Meta-analyses of trials show a modest reduction in feelings of fatigue; in young, healthy people the effect is unclear. |
| Black macaAdvanced level | Promising | 1.5–3 g a day. | Small trials show improvements in sexual desire in men and women, including during menopause. Promising but limited evidence. |
| Rhodiola roseaAdvanced level | Promising | 200–400 mg a day. | Trials in adults with stress and fatigue show moderate improvements in feelings of exhaustion. Studies of variable quality. |
How to choose
An active appearing here does not mean you need it. The quiz combines this goal with the rest of your answers and only suggests the ones with enough reasons, without repeating actives that do the same thing.
Each profile explains the form, time of day, what to check on the label, precautions and studies. If a problem persists or worries you, see a healthcare professional: a supplement is no substitute for that.
Other goals
- Supplements for better sleep
- Supplements for stress
- Supplements for memory and focus
- Supplements for hormonal balance
- Supplements for skin, hair and nails
- Supplements for joints
- Supplements for sugar cravings
- Supplements for vitality and desire
- Supplements for physical performance
- Supplements for digestion
- Supplements for ageing well
Guide reviewed on 3 November 2026. Sources: EFSA, Regulation (EU) 432/2012 and the studies on each profile.
General information based on published scientific evidence and EU law. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle, and are not intended to diagnose, treat or prevent any disease.
Do not exceed the daily dose stated on each product. If you take medication, have a medical condition or have any doubts, ask your doctor or pharmacist.