Durk Fekkes

The bovine protein α-lactalbumin increases the plasma ratio of tryptophan to the other large neutral amino acids, and in vulnerable subjects raises brain serotonin activity, reduces cortisol concentration, and improves mood under stress

C. Rob Markus, Berend Olivier, Geert E. M. Panhuysen et al. · American Journal of Clinical Nutrition · 2000 · 288 citations · Full text

Animal Physiology, Plasma Ratio, Stress Hormone +8

Does Carbohydrate-rich, Protein-poor Food Prevent a Deterioration of Mood and Cognitive Performance of Stress-prone Subjects when Subjected to a Stressful Task?

C. Rob Markus, Geert E. M. Panhuysen, Adriaan Tuiten et al. · Appetite · 1998 · 203 citations

Nutrition, Stress Hormone, Psychiatry +11

Validation of the determination of amino acids in plasma by high-performance liquid chromatography using automated pre-column derivatization with o-phthaldialdehyde

Durk Fekkes, A. van Dalen, Margriet Edelman et al. · Journal of Chromatography B Biomedical Sciences and Applications · 1995 · 159 citations · Full text

Amino Acids, Biochemistry, Gas Chromatography +12

Low serum cholesterol concentration and serotonin metabolism in men

P. H A Steegmans, Durk Fekkes, Arno W. Hoes et al. · BMJ · 1996 · 131 citations

Metabolic Syndrome, Serotonin Metabolism, Eklund Ga +13

The effects of high-dose and low-dose tryptophan depletion on mood and cognitive functions of remitted depressed patients

Linda Booij, Willem van der Does, P.M.J. Haffmans et al. · Journal of Psychopharmacology · 2005 · 106 citations · Full text