Figure 2.

Representative chromatograms of glucosamine in serum: (A) blank serum demonstrating no interfering peaks co-eluted with the compounds of interest; (B) serum containing glucosamine and the internal standard at glucosamine at 10 μg/mL; and (C) pharmacokinetic sample at 2 h post-dose (450 mg glucosamine HCl via administration of one Phycox^® soft chew).