cat's claw - powder or capsules?

[Guest guest]

I've just received my cat's claw (in capsules) from rain-tree.

But I see that they have also in powder. (search: " cat's claw powder " )

There is a huge difference in price.

Capsules (inner bark of cat's claw) about 15-18$ per bottle (100caps x

500mg = 50g)

powder(vine bark) (about 450g) 20$

So... Is there any big difference in used part of the plant?