Klaus Pietrzik

Red blood cell folate concentrations increase more after supplementation with [6 S]-5-methyltetrahydrofolate than with folic acid in women of childbearing age

Yvonne Lamers, Reinhild Prinz‐Langenohl, Susanne Brämswig et al. · American Journal of Clinical Nutrition · 2006 · 165 citations

Agriculture, Nutrition, Nutritional Sciences +14

Influence of feeding different vegetables on plasma levels of carotenoids, folate and vitamin C. Effect of disruption of the vegetable matrix

Karin H. van het Hof, Lilian B.M. Tijburg, Klaus Pietrzik et al. · British Journal Of Nutrition · 1999 · 148 citations · Full text

Agriculture, Nutrition, Nutritional Sciences +17

Vitamin B6 status, deficiency and its consequences--an overview.

André Spinneker, Rafael G. Sola, V. Lemmen et al. · PubMed · 2007 · 138 citations

Life Sciences, Biochemistry, Nutrition +16

Sampling and processing of fresh blood samples within a European multicenter nutritional study: evaluation of biomarker stability during transport and storage

Marcela González‐Gross, C. Breidenassel, Sonia Gómez‐Martínez et al. · International Journal of Obesity · 2008 · 136 citations

Agriculture, Food Science, Nutritional Sciences +16

5,10-Methylenetetrahydrofolate reductase genotype determines the plasma homocysteine-lowering effect of supplementation with 5-methyltetrahydrofolate or folic acid in healthy young women

Iris Fohr, Reinhild Prinz‐Langenohl, Anja Brönstrup et al. · American Journal of Clinical Nutrition · 2002 · 124 citations

Life Sciences, Genetics, Molecular Genetics +15