Obsidian blade

But they're not fda approved and they have a risk of breaking, especially when used to cut through harder tissue.
And in any case, sharper doesn't always mean better. You don't use a fillet knife to cut down a tree even though the knife is much sharper than an axe.

But it works wonders for nervous and brain tissue.

Don't ruin this post with your cutting problems

Is like to interject that steel would be a better blade for almost all purposes.