References
- Ernst, E. Risks of Herbal Medicinal Products. Pharmacoepidemiol. Drug Saf. 2004, 13, 767–771. DOI: 10.1002/pds.1014.
- George, P. Concerns Regarding the Safety and Toxicity of Medicinal Plants – An Overview. Journal of Applied Pharmaceutical Science 2011, 1, 40–44. http://www.japsonline.com/admin/php/uploads/121_pdf.pdf
- Haskell, C. F.; Dodd, F. L.; Wightman, E. L.; Kennedy, D. O. Behavioural Effects of Compounds Co-Consumed in Dietary Forms of Caffeinated Plants. Nutr. Res. Rev. 2013, 26, 49–70. DOI: 10.1017/S0954422413000036.
- Heckman, M. A.; Weil, J.; Gonzalez de Mejia, E. Caffeine (1, 3, 7-Trimethylxanthine) in Foods: A Comprehensive Review on Consumption, Functionality, Safety, and Regulatory Matters. J. Food Sci. 2010, 75, R77–R87. DOI: 10.1111/j.1750-3841.2010.01561.x.
- Andrews, K. W.; Schweitzer, A.; Zhao, C.; Holden, J. M.; Roseland, J. M.; Brandt, M.; Dwyer, J. T.; Picciano, M. F.; Saldanha, L. G.; Fisher, K. D.; et al. The Caffeine Contents of Dietary Supplements Commonly Purchased in the US: analysis of 53 Products with Caffeine-Containing Ingredients. Anal. Bioanal. Chem. 2007, 389, 231–239. DOI: 10.1007/s00216-007-1437-2.
- Rosenfeld, L. S.; Mihalov, J. J.; Carlson, S. J.; Mattia, A. Regulatory Status of Caffeine in the United States. Nutr. Rev. 2014, 72, 23–33. DOI: 10.1111/nure.12136.
- Gurley, B. J.; Steelman, S. C.; Thomas, S. L. Multi-Ingredient, Caffeine-Containing Dietary Supplements: history, Safety, and Efficacy. Clin. Ther. 2015, 37, 275–301. DOI: 10.1016/j.clinthera.2014.08.012.
- Zhang, L.; Kujawinski, D. M.; Federherr, E.; Schmidt, T. C.; Jochmann, M. A. Caffeine in Your Drink: Natural or Synthetic?. Anal. Chem. 2012, 84, 2805–2810. DOI: 10.1021/ac203197d.
- Horie, H.; Nesumi, A.; Ujihara, T.; Kohata, K. Rapid Determination of Caffeine in Tea Leaves. J Chromatogr A. 2002, 942, 271–273. DOI: 10.1016/S0021-9673(01)01360-7
- Oellig, C.; Schunck, J.; Schwack, W. Determination of Caffeine, Theobromine and Theophylline in Mate Beer and Mate Soft Drinks by High-Performance Thin-Layer Chromatography. J. Chromatogr. A 2018, 1533, 208–212. DOI: 10.1016/j.chroma.2017.12.019.
- Association, H. HPTLC Association method for identification of Theobroma cacao bean, 2019, http://www.hptlc-association.org/methods.cfm (accessed Mar 25, 2019).
- Association, H. HPTLC Association method for identification of green tea leaf, 2019. http://www.hptlc-association.org/methods.cfm (accessed Mar 25, 2019).
- Pharmacopoeia, E. General Chapter 2.8.25, High-performance thin-layer chromatography of herbal drugs and herbal drug preparations. 9th Ed. (9.2) ed. European Pharmacopoeia: Strasbourg, 2018.
- Pharmacopeia, U. S., General Chapter <203>, United States Pharmacopeia, USP 39–NF 34 Second Supplement; US Pharmacopeial Convention: Rockville, MD, 2016.
- Pharmacopeia, U. S., USP41-NF36 S1, DSC 2018. Identification method for Coffee Fruit Dry Extract. United State Pharmacopeial Convention: Rockville, MD, 2019.