FOSAVANCE studies The effect of the lower dose of FOSAVANCE (alendronate 70 mg/ vitamin D3 2800 IU) on vitamin D status was demonstrated in a 15-week, multinational study that enrolled 682 osteoporotic post- menopausal women (serum 25-hydroxyvitamin D at baseline: mean, 56 nmol/ l [22.3 ng/ ml]; range, 22.5-225 nmol/ l [9-90 ng/ ml]).