TABLE 1.

Variables related to 1-carbon metabolism and body weight of healthy men and women prior to each infusion protocol¹

	Protocol [1,2-13C]glycine	Protocol [1-13C]glycine
Plasma PLP, nmol/L	55 ± 9	63 ± 15
Serum folate, nmol/L	29 ± 8	28 ± 3
Serum vitamin B-12, pmol/L	395 ± 74	363 ± 80
Plasma tHcy,2μmol/L	7.9 ± 1.5	7.5 ± 1.5
Body weight, kg	69 ± 11	70 ± 13

¹Values are mean ± SD, n = 6.

²tHcy, Total homocysteine.