[He will learn better, in time. Kurama isn't exactly overt but he's definitely not ashamed. Right now he's more learning Akechi's reactions than anything, though, so it's still good data.]

Isn't that the same amount of time it takes you to be able to create another? Perhaps the healing energy simply returns to you at that point to be re-infused.

[Now Akechi gets a nod!] Absolutely. The human body can go much longer without food than without liquid.