Actually, meth heads who are anorexic-looking help further prove that so-called "adrenal fatigue" does not exist.
Meth suppressing the appetite which leads to starvation and causes meth heads to look anorexic, but this can only happen if the adrenal glands are working properly because amphetamines stimulate the adrenals to secrete epinephrine (adrenaline) which is the hormone that causes appetite suppression.
So the next time you see an anorexic-looking meth head, you can say, "Hey, at least you know your adrenal glands are working fine!"