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Caffeine

Caffeine, a central nervous system stimulant found in coffee, green tea, and other beverages, has both health benefits and potential risks depending on the amount consumed.

Health benefits:

  • Mental alertness and cognitive function - enhance focus in the short term
  • Physical performance - by increasing adrenaline levels and releasing fatty acids from fat tissues
  • Metabolism and weight loss - caffeine can boost metabolic rate and increase fat burning
  • Protective effects - regular consumption of coffee and green tea is associated with a reduced risk of certain chronic diseases, including Parkinson's disease, type 2 diabetes, and liver diseases

Health risks:

  • Anxiety and insomnia - sensitivity varies among individuals
  • Heart health - large amounts of caffeine can lead to increased heart rate and blood pressure
  • Dependency - withdrawal symptoms include headache, fatigue, and irritability


Moderation is key to maximizing the health benefits of caffeine while minimizing its risks. For most people, moderate coffee consumption is defined as about 3 to 4 cups per day (up to 400 milligrams of caffeine), although individual tolerance varies. Green tea contains less caffeine than coffee but is rich in antioxidants, making it a healthy choice for those who are sensitive to caffeine.

Caffeine News

Hold onto your mugs, coffee lovers! Coffee may help burn fat and fight diabetes

ScienceAlert - 07-Feb-2024

This finding adds to our understanding of how caffeine might impact our health

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Mice who sipped green tea all their lives lived longer and stayed healthier

Live Forever Club - 04-Feb-2024

Green tea improved gut health and boosted the immune system in mice

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The more you rely on energy drinks, the higher the risk of insomnia

The Guardian - 22-Jan-2024

Both men and women had trouble sleeping the more they drank them

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Live longer with good health by drinking ground coffee every day

Independent - 10-Feb-2022

Instant coffee had no such benefits but contains twice the amount of possibly harmful acrylamide

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New study reported the benefits of drinking of tea or coffee

Independent - 17-Nov-2021

Drinking coffee and tea reduces the risk of dementia and ischaemic stroke

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Caffeine Resources

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Caffeine Blog Posts

A coffee a day keeps the grim reaper away
16-Feb-2016

A coffee a day keeps the grim reaper away

Relief for the many people who think their coffee habit is a guilty pleasure