Table 4.

Effect of Met and GAA supplementation on renal reabsorption of GAA and creatine

Metabolite	Met, g/d	GAA, g/d						P-value1
		0	10	20	30	40	SEM	Met	G-L	G-Q	Met × G-L	Met × G-Q
		% renal reabsorption
GAA	0	56.8	53.6	64.7	65.9	77.7	5.6	0.05	0.47	0.11	<0.001	0.77
	12	67.2	58.7	50.2	51.1	52.1
Creatine	0	90.2	85.2	78.0	77.7	88.6	2.5	0.10	<0.01	<0.01	0.13	0.01
	12	84.0	84.8	77.8	75.2	74.6

¹G-L, linear effect of GAA; G-Q, quadratic effect of GAA.