What you think you want...

Versus what you really want/need may be completely different, at least according to this post. Among the more common cravings:

• What you want = sweets -> What you really need = chromium, carbon, phosphorus, sulfur, tryptophan
• What you want = bread -> What you really need = nitrogen
• What you want = fatty snacks -> What you really need = calcium
• What you want = coffee -> What you really need = phosphorus, sulfur, NaCl, iron
• What you want = salty foods -> What you really need = chloride

And I'm just going to throw this out there... some people who crave alcohol or marijuana may not have a protein, avenin, calcium, glutamine, and/or potassium deficit.