COGNITIVE – CHEWING:
http://www.chewinggumfacts.com/chewing-gum-benefits/health-benefits-of-gum-chewing/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4449949/
https://www.health.harvard.edu/newsletter_article/the-quirky-brain-chewing-gum-and-memory
https://www.newscientist.com/article/dn2039-chewing-gum-improves-memory/
https://www.ncbi.nlm.nih.gov/pubmed/19356310
https://www.psychologistworld.com/memory/chewing-gum
https://www.hindawi.com/journals/bmri/2015/654806/
https://www.livescience.com/17520-chewing-gum-test-performance.html
https://www.sciencedaily.com/releases/2013/03/130308093933.htm
https://www.lifehack.org/355556/10-surprising-benefits-chewing-gum
https://www.livestrong.com/article/13723289-benefits-of-chewing-gum/
PHYSICAL – CAFFEINE:
https://www.ncbi.nlm.nih.gov/pubmed/26285020
https://www.caffeineinformer.com/top-10-caffeine-health-benefits
https://www.healthline.com/nutrition/top-13-evidence-based-health-benefits-of-coffee
https://www.netdoctor.co.uk/healthy-living/wellbeing/a20659615/benefits-of-caffeine/
https://www.humann.com/science/benefits-of-caffeine/
http://www.ncausa.org/Health-Caffeine
https://www.telegraph.co.uk/health-fitness/body/surprising-health-benefits-caffeine/
SPEARMINT:
https://www.ncbi.nlm.nih.gov/pubmed/?term=spearmint+anxiety
https://www.ncbi.nlm.nih.gov/pubmed/18593637
https://www.livestrong.com/article/111248-benefits-mint-chewing-gum/
OTHER RESEARCH AND STUDIES:
https://www.menshealth.com/fitness/a19540292/caffeinated-gum/
http://time.com/4029494/caffeinated-gum/
https://www.purewow.com/wellness/Chewing-Gum-Instead-of-Coffee
https://jissn.biomedcentral.com/articles/10.1186/1550-2783-7-5#Sec17
https://www.huffpost.com/entry/health-and-fitness_b_5412685
https://www.runnersworld.com/health-injuries/a20854907/5-ways-runners-are-messing-up-their-teeth/
https://www.sciencedaily.com/releases/2019/08/190823080012.htm
