# Health effects of coffee consumption

> Live situation record from CLSTR: https://clstr.news/situations/20261026-health-effects-of-coffee-consumption
> Updated: 2026-10-26T06:00:09.000Z. Sources: 4. Developments: 2.

Research indicates that coffee consumption provides benefits such as increased alertness and concentration, though it can cause side effects like nervousness, heart palpitations, or stomach issues. It may also temporarily increase intraocular pressure and exacerbate acid reflux symptoms.

Studies comparing caffeinated and decaffeinated coffee show that while decaffeinated versions significantly reduce caffeine intake, they retain many beneficial properties like antioxidants and anti-inflammatory polyphenols. However, decaffeinated coffee can still cause gastric irritation or heartburn due to remaining acids. Consumers are advised to monitor caffeine levels across different styles and consider decaffeination methods to minimize potential side effects.

## Timeline

### 2026-10-26: Health impacts of caffeinated versus decaffeinated coffee

Decaffeinated coffee retains antioxidants and polyphenols but still contains acids that can cause gastric irritation. Caffeine levels are reduced by approximately 97% compared to regular espresso.

4 sources. https://clstr.news/cluster/health-impacts-of-caffeinated-versus-decaffeinated-coffee

### 2026-10-11: Health effects of coffee and natural caffeine alternatives

Coffee provides alertness but can cause side effects like increased eye pressure or reflux. Natural alternatives like matcha and green tea offer milder caffeine boosts and antioxidant benefits.

5 sources. https://clstr.news/cluster/health-effects-of-coffee-and-natural-caffeine-alternatives

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Cite as: Health effects of coffee consumption. CLSTR, https://clstr.news/situations/20261026-health-effects-of-coffee-consumption