Hi Fara,
There certainly are herbs that can support elders with energy, but which herb that would be depends on the individuals situation and why they might be feeling less energy or why/how they wish to feel more ‘energetic’.
I would suggest starting with looking at diet and lifestyle and hydration (that’s a big one), then working with herbs such as adaptogens, nervines, or maybe they might need a bit of cognitive support, circulation support, or liver/kidney bowel support.
It’s very hard to suggest any herbs without knowing the situation in particular, but some herbs could be eleuthero, hawthorn, gotu kola, maca, rosemary, dandelion, holy basil/tulsi, etc. it really depends on the above mentioned aspects.
Warmly,
Benna