1. Nawrot, P., Jordan, S., Eastwood, J., Rotstein, J., Hugenholtz, A., & Feeley, M. (2003) Effects of caffeine on human health, Food Additives & Contaminants, 20:1, 1-30. https://doi.org/10.1080/0265203021000007840
2. Drake, C., Roehrs, T., Shambroom, J., Roth, T. (2013). Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine. Nov 15;9(11):1195-200. https://doi.org/10.5664/jcsm.3170
3. Smirmaul, B.P.C., de Moraes, A.C., Angius, L. et al. (2017) Effects of caffeine on neuromuscular fatigue and performance during high-intensity cycling exercise in moderate hypoxia. Eur J Appl Physiol 117, 27–38. https://doi.org/10.1007/s00421-016-3496-6
4. Grgic, J., Trexler, E.T., Lazinica, B. et al. (2018) Effects of caffeine intake on muscle strength and power: a systematic review and meta-analysis. J Int Soc Sports Nutr 15, 11. https://doi.org/10.1186/s12970-018-0216-0
5. Martinez, N., Campbell, B., Franek, M. et al. (2016) The effect of acute pre-workout supplementation on power and strength performance. J Int Soc Sports Nutr 13, 29 . https://doi.org/10.1186/s12970-016-0138-7
6. Wikoff, D., Welsh, B.T., Henderson, R., Brorby, G.P., Britt, J., Myers, E., Goldberger, J., Lieberman, H.R., O'Brien, C., Peck, J., Tenenbein, M., Weaver, C., Harvey, S., Urban, J., Doepker, C. (2017) Systematic review of the potential adverse effects of caffeine consumption in healthy adults, pregnant women, adolescents, and children. Food and Chemical Toxicology, 109, 1, 585-648. https://doi.org/10.1016/j.fct.2017.04.002
7. Temple, J.L., Bernard, C., Lipshultz, S.E., Czachor, J.D., Westphal, J.A., Mestre, M.A. (2017) The Safety of Ingested Caffeine: A Comprehensive Review. Front Psychiatry. May 26;8:80. https://doi.org/10.1016/j.fct.2017.04.002
8. Harty, P.S., Zabriskie, H.A., Erickson, J.L., Molling, P.E., Kerksick, C.M., Jagim, A.R. (2018) Multi-ingredient pre-workout supplements, safety implications, and performance outcomes: a brief review. J Int Soc Sports Nutr. 8;15(1):41. https://doi.org/10.1186/s12970-018-0247-6
9. Bescós, R., Sureda, A., Tur, J.A., Pons, A. (2012) The effect of nitric-oxide-related supplements on human performance. Sports Med. 1;42(2):99-117. https://doi.org/10.2165/11596860-000000000-00000
10. Mäkinen, K.K. (2016) Gastrointestinal Disturbances Associated with the Consumption of Sugar Alcohols with Special Consideration of Xylitol: Scientific Review and Instructions for Dentists and Other Health-Care Professionals. Int J Dent. 2016:5967907. https://doi.org/10.1155/2016/5967907
11. Pickering, C., Grgic, J. (2019) Caffeine and Exercise: What Next?. Sports Med 49, 1007–1030. https://doi.org/10.1007/s40279-019-01101-0
12. Reza Tabrizi, Parvane Saneei, Kamran B Lankarani, Maryam Akbari, Fariba Kolahdooz, Ahmad Esmaillzadeh, Somayyeh Nadi-Ravandi, Majid Mazoochi & Zatollah Asemi (2019) The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials, Critical Reviews in Food Science and Nutrition, 59:16, 2688-2696. https://doi.org/10.1080/10408398.2018.1507996
13. Spencer, M., Gupta, A., Dam, L.V., Shannon, C., Menees, S., Chey, W.D. (2016) Artificial Sweeteners: A Systematic Review and Primer for Gastroenterologists. J Neurogastroenterol Motil 22:168-180. https://doi.org/10.5056/jnm15206
14. Kreider, R.B., Kalman, D.S., Antonio, J. et al. (2017) International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr 14, 18. https://doi.org/10.1186/s12970-017-0173-z
15. Trexler, E.T., Smith-Ryan, A.E., Stout, J.R. et al. (2015) International society of sports nutrition position stand: Beta-Alanine. J Int Soc Sports Nutr 12, 30. https://doi.org/10.1186/s12970-015-0090-y
16. Bellinger, Phillip M. (2014) β-Alanine Supplementation for Athletic Performance, Journal of Strength and Conditioning Research. 28, 6 - p 1751-1770 https://doi.org/10.1519/jsc.0000000000000327
17. Allerton, T.D.; Proctor, D.N.; Stephens, J.M.; Dugas, T.R.; Spielmann, G.; Irving, B.A. (2018) l-Citrulline Supplementation: Impact on Cardiometabolic Health. Nutrients, 10, 921. https://doi.org/10.3390/nu10070921
18. Xu, Y. J., Arneja, A. S., Tappia, P. S., & Dhalla, N. S. (2008). The potential health benefits of taurine in cardiovascular disease. Experimental and clinical cardiology, 13(2), 57–65.