1. Hill JO, Wyatt HR, Peters JC. The Importance of Energy Balance. Eur Endocrinol. 2013 Aug;9(2):111-115. doi: 10.17925/EE.2013.09.02.111. Epub 2013 Aug 23. PMID: 29922364; PMCID: PMC6003580.

2. McLellan TM, Caldwell JA, Lieberman HR. A review of caffeine’s effects on cognitive, physical and occupational performance. Neurosci Biobehav Rev. 2016 Dec;71:294-312. doi: 10.1016/j.neubiorev.2016.09.001. Epub 2016 Sep 6. PMID: 27612937.

3. Martins GL, Guilherme JPLF, Ferreira LHB, de Souza-Junior TP, Lancha AH Jr. Caffeine and Exercise Performance: Possible Directions for Definitive Findings. Front Sports Act Living. 2020 Dec 11;2:574854. doi: 10.3389/fspor.2020.574854. PMID: 33345139; PMCID: PMC7739593.

4. Coffee consumption and health: umbrella review of meta-analyses of multiple health outcomes. BMJ. 2018 Jan 12;360:k194. doi: 10.1136/bmj.k194. Erratum for: BMJ. 2017 Nov 22;359:j5024. PMID: 29330262; PMCID: PMC5765813.

5. Johnson-Wimbley, T. D., & Graham, D. Y. (2011). Diagnosis and management of iron deficiency anemia in the 21st century. Therapeutic advances in Gastroenterology, 4(3), 177-184.

6. 2015-2020 Dietary Guidelines for Americans. U.S. Department of Health and Human Services and U.S. Department of Agriculture. https://health.gov/our-work/food-nutrition/2015-2020-dietary-guidelines/guidelines. Accessed Feb. 1, 2020

7. Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. J Clin Sleep Med. 2013 Nov 15;9(11):1195-200. doi: 10.5664/jcsm.3170. PMID: 24235903; PMCID: PMC3805807

8. Kline CE, Chasens ER, Bizhanova Z, Sereika SM, Buysse DJ, Imes CC, Kariuki JK, Mendez DD, Cajita MI, Rathbun SL, Burke LE. The association between sleep health and weight change during a 12-month behavioral weight loss intervention. Int J Obes (Lond). 2021 Mar;45(3):639-649. doi: 10.1038/s41366-020-00728-8. Epub 2021 Jan 7. PMID: 33414489; PMCID: PMC7914147.

9. Nehlig A. Is caffeine a cognitive enhancer? J Alzheimers Dis. 2010;20 Suppl 1:S85-94. doi: 10.3233/JAD-2010-091315. PMID: 20182035 (anxiety)

10. Juliano LM, Griffiths RR. A critical review of caffeine withdrawal: empirical validation of symptoms and signs, incidence, severity, and associated features. Psychopharmacology (Berl). 2004 Oct;176(1):1-29. doi: 10.1007/s00213-004-2000-x. Epub 2004 Sep 21. PMID: 15448977.

11. Azadi-Schossig, Parastu; Becker, Klaus; Attin, Thomas (2016). Chelating effect of citric acid is negligible for development of enamel erosions. Clinical Oral Investigations, 20(7):1577-1587.