Increase in circulating holotranscobalamin after oral administration of cyanocobalamin or hydroxocobalamin in healthy adults with low and normal cobalamin status.
E. Greibe, N. Mahalle, V. Bhide, C.W. Heegaard, S. Naik, E. Nexo.
Eur J Nutr. 2017. doi: https://doi.org/10.1007/s00394-017-1553-5

Effect of 8-week oral supplementation with 3-µg cyano-B12 or hydroxo-B12 in a vitamin B12-deficient population. 
E. Greibe, N. Mahalle, V. Bhide, S. Fedosov, C.W. Heegaard, S. Naik, E. Nexo.
Eur J Nutr. 2017. doi: https://doi.org/10.1007/s00394-017-1590-0

Comparative bioavailability of synthetic B12 and dietary vitamin B12 present in cow and buffalo milk: A prospective study in lactovegetarian Indians.
N. Mahalle, V. Bhide, E. Greibe, C.W. Heegaard, E. Nexo, S.N. Fedosov, S. Naik.
Nutrients. 2019;11(2). https://doi.org/10.3390/nu11020304

Vitamin B12 and its Binding Proteins in Milk from Cow and Buffalo in Relation to Bioavailability of B12.
S.N. Fedosov, E. Nexo, C.W. Heegaard.
J Dairy Sci. 2019;102(6):4891-4905. https://doi.org/10.3168/jds.2018-15016

Cyano-B12 or whey powder with endogenous hydroxo-B12 for supplementation in B12 deficient lactovegetarians
S. Naik, N. Mahalle, V. Bhide, E. Greibe, M.S. Ostenfeld, C.W. Heegaard, E. Nexo, S.N. Fedosov. Nutrients 2019, 11(10), 2382. https://doi.org/10.3390/nu11102382

Whey intervention improves vitamin B12 status in the elderly (Tentative title).
(in preparation).