Mareck, Ute

Nutritional supplements cross-contaminated and faked with doping substances

Geyer, H., Parr, M. K., Koehler, K., Mareck, U., Schänzer, W., & Thevis, M. (2008) · Journal of Mass Spectrometry

Doping in SportsPharmaceutical Quality and Counterfeiting

Cited by 375

Analysis of Non-Hormonal Nutritional Supplements for Anabolic-Androgenic Steroids - Results of an International Study

Geyer, H., Parr, M. K., Mareck, U., Reinhart, U., Schrader, Y., & Schänzer, W. (2004) · International Journal of Sports Medicine

Doping in SportsPharmaceutical Quality and Counterfeiting

Cited by 344

Dietary Supplement and Food Contaminations and Their Implications for Doping Controls

Walpurgis, K., Thomas, A., Geyer, H., Mareck, U., & Thevis, M. (2020) · Foods

Doping in SportsPharmacological Effects and Assays

Cited by 136

Determination of 13C/12C ratios of urinary epitestosterone and its main metabolites 5α‐ and 5β‐androstane‐3α, 17α‐diol

Piper, T., Riemann, P., Opfermann, G., Mareck, U., Geyer, H., Vajiala, G., Flenker, U., & Schänzer, W. (2009) · Drug Testing and Analysis

Doping in SportsPharmacological Effects and Assays

Cited by 31

High doses of the anabolic steroid metandienone found in dietary supplements

Geyer, H., Bredehöft, M., Mareck, U., Parr, M., & Schänzer, W. (2003) · European Journal of Sport Science

Doping in SportsPharmaceutical Quality and Counterfeiting

Cited by 28

Reporting and managing elevated testosterone/epitestosterone ratios–novel aspects after five years' experience

Mareck, U., Geyer, H., Fußhöller, G., Schwenke, A., Haenelt, N., Piper, T., Thevis, M., & Schänzer, W. (2010) · Drug Testing and Analysis

Doping in SportsPharmacological Effects and Assays

Cited by 28