Figure 3From: Adenosine 5′-triphosphate (ATP) supplements are not orally bioavailable: a randomized, placebo-controlled cross-over trial in healthy humansPlasma lithium concentrations in healthy volunteers after administration of supplement containing 60 mg Li 2 CO 3 . A single dose of 5000 mg ATP or placebo with 60 mg Li2CO3 was administered via proximal-release pellets or distal-release pellets. Values are means ± SEM, n = 8.Back to article page