Table 1.

Biochemical investigations in metabolic diseases affecting skin, hair and nails.

Basic tests	Profiles	Special tests
Blood count	Amino acids (P, U)	Copper (S, U)
ASAT/ALAT (P)	Organic acids (U)	Transferrin (S)
CK (P)	Acylcarnitines (DBS, P)	Iron (S)
ALP (P)	Sialotransferins (S)	Ferritin (S)
Lactate (P)	Sterols (P)	Carnitine (P)
Glucose (P)	VLCFA (P)	Glycogen (L)
Ammonia (B)	Lipid panel (S)	Lysosomal Enzymes (S)
Coagulation factors	Monogenic (CSF)	Neopterin (CSF)
	Porphyrins (U)	Vitamins (S)
		Interferon-alpha (CSF)