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Using a Home Blood Pressure Monitor
Using a Home Blood Pressure Monitor

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Nutrition Library: Healthy Eating

The Scoop on Caffeine

Caffeine is a stimulant that makes you feel energetic and alert.

Caffeine is commonly found in coffee, tea and caffeinated sodas.

You will feel noticeable effects after drinking too much caffeine. Evidence relating caffeine to serious health problems is weak, and is connected with people who consume eight or more servings per day.

Caffeine has been correlated with:


  • Cardiovascular disease
  • Osteoporosis
  • Fibrocystic breast changes
  • Stomach irritation/inflammation
  • Irritable bowel syndrome symptoms

Caffeine comparison

Beverage Milligrams of caffeine per serving

Brewed coffee, drip method

Instant coffee, 1 rounded teaspoon 65
Decaffeinated coffee 2
Flavored coffee, regular and sugar-free 25-75
Espresso (1.5 to 2 oz.) 100
Tea 15-40
Soda 30-50

Caffeine can affect your

Nervous system — Caffeine can make you anxious, nervous and irritable. It can increase your heart rate and cause insomnia.

Digestive system — Caffeine can produce heartburn and irritate stomach ulcers.

Bladder — Caffeine causes bladder irritation in some people and can act as a diuretic.

Decaffeinated Beverages

Try decaffeinated beverages to enjoy the taste and aroma of coffee without the effects of caffeine.

(Source: Adapted from Mayo Clinic Health Oasis)

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