Some research suggests that caffeine may enhance lung function in non-smokers and former smokers. Caffeine exerts anti-inflammatory effects that mitigate COPD exacerbations, although smoking appears to build up resistance to these effects. The chemical makeup is similar to theophylline, a common COPD medication for breathing difficulty. Caffeine affects individuals differently. It is a stimulant that can help increase alertness and exercise performance. However, too much can cause jitters and insomnia. Consult a physician about any concerns regarding caffeine consumption.

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