Depletion. Depletion is the using up of natural resources by mining, quarrying, drilling, or felling. The depletion deduction allows an owner or operator to account for the reduction of a product's reserves. There are two ways of figuring depletion: cost depletion and percentage depletion.
1 In addition, tryptophan can reduce anxiety by promoting better sleep.  Examples of foods high in tryptophan include: cheese, chicken, soy products, eggs, tofu, fish, milk, turkey, nuts, peanuts and peanut butter, pumpkin seeds, and sesame seeds.
it may make anxiety worse. it is a good antidepressant, but you need something to calm you, not stimulate. foods rich in magnesium can help, breathing techniques can help, music, etc. and of course there are a plethoria of perscriptions out there for such. but you'll have to ask your dr about them.