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Health Aff (Project Hope)

Interestingly, some research suggests that taking calcium supplements alongside metformin may help counteract this effect, supporting the calcium-dependent absorption theory [1]
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Binding properties of androgen receptors.J.Biol.Chem.1976,251, 5620-5629 54
S W Nienhuijs, I H J T de Hingh, M D P Luyer, G van Montfort, E H Ponten, J F Smulders (Department of Surgery, Catharina Hospital, Eindhoven)