SpringerPlus

Table 4 Estimation of amino acid wearing away in hair by the adult pre-human hominid, average and (range)

From: Hair for brain trade-off, a metabolic bypass for encephalization

	Hair content^a	Daily loss^b	Minimal requirement^c
	%	g/d	g/d
Total hair wearing away		21 – 56
Arginine	6.3 (6.1–9.3).	2.5 (0.5 – 9).
Sulphuric amino acids^d	17 (8-18.7).	6.5 (1.7 – 11).	1.5
Aromatic amino acids^e	3.8 (2-7).	1.4 (0.4 – 3.4).	2.7

^aSee Table 7, median and range.
^bAccording to Tables 2 and5, median and range.
^cCalculated according to Table 2 and assuming 70 kg body weight.
^dCysteine and methionine.
^ePhenylalanine and tyrosine.

Back to article page