Dietary intake and biochemical, hematologic, and immune status of vegans compared with nonvegetarians

Authors:Haddad, E. H., Berk, L. S., Kettering, J. D., Hubbard, R. W. and Peters, W. R.
"Vegans had significantly lower leukocyte, lymphocyte, and platelet counts and lower concentrations of complement factor 3 and blood urea nitrogen but higher serum albumin concentrations."