This is copied from the Dr Hulda Clark Outreach Foundation site:

"Tincture VS Caps

Green Black-Walnut Hull (GBWH) got the name from the fact that the Black-Walnut s are harvested of the tree when they are still green. When Dr. Hulda Clark first wrote the book The Cure For All Diseases , the capsule version was not invented yet. She has however since stated (on the video The Cure) that the capsule version of GBWH is just as pure and much stronger and more effective than the Extra Strength Tincture. Another benefit is that there is no alcahol in the capsules."