Maca is widely promoted for libido and sexual performance, but randomized-trial evidence remains limited.

Fennel has small randomized trials for menopause symptoms, but the evidence base is limited and study quality raises uncertainty.

Tulsi has small human trials suggesting benefits for perceived stress and some sleep measures, but the evidence is still early.

Lemon balm has some human evidence for anxiety and depressive symptoms, but trials are small and heterogeneous.

Cinnamon is heavily promoted for blood sugar, but studies conflict and species differences matter—especially because cassia cinnamon contains coumarin.

Boswellia may modestly improve osteoarthritis pain and function, but most studies are small and low quality.

Saffron has a growing randomized-trial literature for depressive and anxiety symptoms, but the evidence still has important limitations.

Panax ginseng has some human evidence for erectile function and mixed evidence for blood sugar, with important medication and safety considerations.

Green tea is a beverage; concentrated green tea extract is a supplement. The evidence and safety profile are not the same.

Sage has preliminary human research for memory and hot flashes, but the evidence is limited and high-dose thujone exposure matters.