13. Ma Huang: Breathing Easier
This Chinese shrub produces ephedrine, a compound that opens airways and reduces nasal congestion. Ancient Chinese medicine used it for over 5,000 years to treat asthma and colds. Pharmaceutical companies created synthetic derivatives like pseudoephedrine for commercial decongestants. Unfortunately, people misuse pseudoephedrine to manufacture methamphetamine, leading to sales restrictions. Despite these limitations, ephedra-derived medications remain important options for respiratory conditions when used appropriately.