References:
- Caffeine: How much is too much? - (http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/caffeine/art-20045678)
- Coffee and health: a review of recent human research. - (https://www.ncbi.nlm.nih.gov/pubmed/16507475)
- Effects of caffeine on human health. - (https://www.ncbi.nlm.nih.gov/pubmed/12519715)
- Genetics of caffeine consumption and responses to caffeine. - (https://www.ncbi.nlm.nih.gov/pubmed/20532872)
- Does caffeine cause breast cysts? - (http://www.mayoclinic.org/diseases-conditions/breast-cysts/expert-answers/breast-cysts/faq-20058342)
Editor: Dr. Lakshmi Venkataraman
Technically Checked by: Lingaraj