At 500mg per capsule, you're getting **Rhodiola rosea** extract above the upper end of the studied dose range (144–400mg), so a single capsule already delivers a full clinical dose for supporting stress resilience and reducing mental fatigue. The extract is standardized to minimum 3% rosavins and 1% salidroside — the two marker compounds used in clinical trials to verify potency. If you're taking this for stress-related fatigue or to stay sharp during demanding periods, one capsule covers you.

Rhodiola has moderate clinical evidence for reducing perceived fatigue under stress and supporting mental performance when you're running low on energy. It also shows relevance for mood support, though the research there is thinner. The label suggests 1–2 capsules daily — one capsule is the sweet spot based on the research. Taking two puts you at 1,000mg, which is well beyond what most trials have tested.

Rhodiola can feel mildly stimulating, so you'll want to take it earlier in the day rather than before bed. If you're sensitive to energizing supplements, start with one capsule and see how you respond.