[1] Astrup A, Toubro S, Cannon S, Hein P, Breum L, Madsen J. Caffeine: a double-blind, placebo-controlled study of its thermogenic, metabolic, and cardiovascular effects in healthy volunteers. The American journal of clinical nutrition. 1990;51(5):759-67.
[2] Belza, A., Toubro, S. & Astrup, A. The effect of caffeine, green tea and tyrosine on thermogenesis and energy intake. Eur J Clin Nutr 63, 57–64 (2009). https://doi.org/10.1038/sj.ejcn.1602901
[3] Schubert MM, Irwin C, Seay RF, Clarke HE, Allegro D, Desbrow B. Caffeine, coffee, and appetite control: a review. Int J Food Sci Nutr. 2017 Dec;68(8):901-912. doi: 10.1080/09637486.2017.1320537. Epub 2017 Apr 27. PMID: 28446037.
[4] Nanci S. Guest1* , et al. International society of sports nutrition position stand: caffeine and exercise performance. Journal of the International Society of Sports Nutrition (2021) 18:1