Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Dementia01:30

Dementia

580
Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
The progression of dementia is generally gradual....
580
Cognitive Dissonance01:38

Cognitive Dissonance

37.5K
Social psychologists have documented that feeling good about ourselves and maintaining positive self-esteem is a powerful motivator of human behavior (Tavris & Aronson, 2008). In the United States, members of the predominant culture typically think very highly of themselves and view themselves as good people who are above average on many desirable traits (Ehrlinger, Gilovich, & Ross, 2005). Often, our behavior, attitudes, and beliefs are affected when we experience a threat to our...
37.5K
Regulation of Water Intake01:25

Regulation of Water Intake

2.8K
Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
2.8K
Regulation of Food Intake01:30

Regulation of Food Intake

2.9K
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
2.9K
Relative Risk01:12

Relative Risk

2.2K
Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...
2.2K
Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

13.7K
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
13.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Circulating pre-diagnostic metabolites and risk of hepatocellular carcinoma and intrahepatic cholangiocarcinoma: a population-based study of 12 cohorts.

Journal of the National Cancer Institute·2026
Same author

Association of long-term physical activity levels with dementia risk and cognitive function in US adults: a prospective cohort study.

The Lancet. Public health·2026
Same author

Estimated preventable fraction of chronic disease attributed to long-term physical activity and diet quality, independent of body weight: a prospective cohort study of three US cohorts.

Lancet regional health. Americas·2026
Same author

Planetary Health Diet Index and breast cancer risk.

British journal of cancer·2026
Same author

Metabolomic signatures of dietary carbohydrates and differential association with type 2 diabetes.

Nature health·2026
Same author

Adherence to the Mediterranean diet and risk of pancreatic cancer: an analysis of 2.3 million participants in the Pooling Project of Prospective Studies of Diet and Cancer (DCPP).

European journal of epidemiology·2026

Related Experiment Video

Updated: Feb 10, 2026

Using Retinal Imaging to Study Dementia
09:17

Using Retinal Imaging to Study Dementia

Published on: November 6, 2017

22.3K

Coffee and Tea Intake, Dementia Risk, and Cognitive Function.

Yu Zhang1,2,3, Yuxi Liu2,3,4, Yanping Li1,2

  • 1Department of Nutrition, T.H. Chan School of Public Health, Harvard University, Boston, Massachusetts.

JAMA
|February 9, 2026
PubMed
Summary
This summary is machine-generated.

Drinking caffeinated coffee and tea is linked to a lower risk of dementia and improved cognitive function. Moderate consumption, around 2-3 cups of coffee or 1-2 cups of tea daily, showed the most significant benefits.

More Related Videos

Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples
06:04

Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples

Published on: September 28, 2022

2.5K
Methodology to Test Control Agents and Insecticides Against the Coffee Berry Borer Hypothenemus hampei
09:23

Methodology to Test Control Agents and Insecticides Against the Coffee Berry Borer Hypothenemus hampei

Published on: March 23, 2022

2.4K

Related Experiment Videos

Last Updated: Feb 10, 2026

Using Retinal Imaging to Study Dementia
09:17

Using Retinal Imaging to Study Dementia

Published on: November 6, 2017

22.3K
Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples
06:04

Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples

Published on: September 28, 2022

2.5K
Methodology to Test Control Agents and Insecticides Against the Coffee Berry Borer Hypothenemus hampei
09:23

Methodology to Test Control Agents and Insecticides Against the Coffee Berry Borer Hypothenemus hampei

Published on: March 23, 2022

2.4K

Area of Science:

  • Neuroscience
  • Epidemiology
  • Nutritional Science

Background:

  • Evidence linking coffee and tea consumption to cognitive health is inconclusive.
  • Most prior studies do not differentiate between caffeinated and decaffeinated coffee intake.
  • Understanding these associations is crucial for public health recommendations.

Purpose of the Study:

  • To investigate the association between coffee (caffeinated and decaffeinated) and tea intake and the risk of dementia.
  • To examine the relationship between coffee and tea consumption and cognitive function, including subjective cognitive decline and objective cognitive performance.

Main Methods:

  • A prospective cohort study involving female participants from the Nurses' Health Study (NHS) and male participants from the Health Professionals Follow-up Study (HPFS).
  • Dietary intake of caffeinated coffee, decaffeinated coffee, and tea was assessed using validated food frequency questionnaires every 2-4 years.
  • Dementia incidence was identified through death records and physician diagnoses; cognitive function was assessed using questionnaires and neuropsychological tests.

Main Results:

  • Higher intake of caffeinated coffee was significantly associated with a lower risk of dementia (HR, 0.82; 95% CI, 0.76-0.89) and lower prevalence of subjective cognitive decline.
  • Higher tea consumption showed similar protective associations with cognitive outcomes.
  • Decaffeinated coffee intake was not associated with dementia risk or cognitive performance.
  • Dose-response analysis indicated nonlinear inverse associations for caffeinated coffee and tea with dementia risk and subjective cognitive decline, with peak benefits at moderate consumption levels (2-3 cups of coffee or 1-2 cups of tea daily).

Conclusions:

  • Greater consumption of caffeinated coffee and tea is associated with a reduced risk of dementia and improved cognitive function.
  • Moderate intake levels of caffeinated coffee and tea appear most beneficial for cognitive health.
  • These findings suggest that caffeinated coffee and tea may play a role in maintaining cognitive function and preventing dementia.