Origins
The coffee in your cup starts on a tree! Coffee “beans” are the seeds of the coffee tree, harvested and roasted from coffee-growing regions across the world. This is coffee’s origin story.
Origins
What is coffee?
Coffee regions of the world
History of coffee
Lifecycle of Coffee
Beans
The coffee beans you choose—and how they are extracted, dried, roasted, and stored—play a role in your coffee’s taste, texture, and caffeination.
Beans
Varieties
Processes
Roasts
Decaf coffee
Organic coffee
Coffee certifications
Storage and shelf life
Brewing
Learning how to brew coffee—or refining your skills—is a delicious journey. Explore brewing methods as well as techniques and tips for everything from grinding beans to cleaning equipment.
Brewing
Drip coffee
Pour-over coffee
Espresso
French press coffee
Cold brew coffee
Health
Here you’ll find information about coffee and health, all based on independent research, including evidence that shows that drinking coffee is linked to overall longer, healthier lives.
Health
Health benefits of coffee
Research library
Frequently asked questions
Sustainability
Learn how the industry has stepped up to make coffee more sustainable from seed to cup—addressing environmental needs and supporting farmers and the many people who keep your cup full.
Sustainability
Environmental support
Navigating climate change
Preventing deforestation
Industry initiatives

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Urinary caffeine and caffeine metabolites, asthma, and lung function in a nationwide study of U.S. adults

October 10, 2021

Han YY, Forno E, Celedón JC

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Citations

Han YY ,, Forno E, Celedón JC. Urinary caffeine and caffeine metabolites, asthma, and lung function in a nationwide study of U.S. adults. J Asthma. 2022 Nov;59(11):2127-2134. doi: 10.1080/02770903.2021.1993250. Epub 2021 Oct 27. PMID: 34644210; PMCID: PMC9302926.

All information presented is general and not intended as a substitute for individualized healthcare or advice. Please consult your healthcare provider about your personal health.

Urinary caffeine and caffeine metabolites, asthma, and lung function in a nationwide study of U.S. adults

Citations

Caffeine for asthma

Coffee Intake, Smoking, and Pulmonary Function in the Atherosclerosis Risk in Communities Study

Association between coffee intake and frailty among older American adults: A population-based cross-sectional study

Caffeine for asthma

Coffee Intake, Smoking, and Pulmonary Function in the Atherosclerosis Risk in Communities Study

Association between coffee intake and frailty among older American adults: A population-based cross-sectional study

Caffeine for asthma

Coffee Intake, Smoking, and Pulmonary Function in the Atherosclerosis Risk in Communities Study

Association between coffee intake and frailty among older American adults: A population-based cross-sectional study

Citations

Further Research

Caffeine for asthma

Coffee Intake, Smoking, and Pulmonary Function in the Atherosclerosis Risk in Communities Study

Association between coffee intake and frailty among older American adults: A population-based cross-sectional study

Caffeine for asthma

Coffee Intake, Smoking, and Pulmonary Function in the Atherosclerosis Risk in Communities Study

Association between coffee intake and frailty among older American adults: A population-based cross-sectional study

Caffeine for asthma

Coffee Intake, Smoking, and Pulmonary Function in the Atherosclerosis Risk in Communities Study

Association between coffee intake and frailty among older American adults: A population-based cross-sectional study