Aspirin Comes From Tree Bark

For thousands of years, people suffering from aches and fevers turned to a surprisingly simple remedy: chewing on the bark of a willow tree. Ancient Egyptian and Sumerian texts dating back over 3,500 years document this practice, and the Greek physician Hippocrates recommended it for pain relief. These civilizations didn't know it, but the key to the bark's power was a chemical compound called salicin, a natural anti-inflammatory and pain reliever.

While effective, raw willow bark had a major drawback: it was incredibly harsh on the stomach. The journey to a modern pill began in the 19th century when scientists first isolated salicin and converted it into a more potent form, salicylic acid. This was a better pain reliever but was even more irritating. The final breakthrough came in 1897 at the German company Bayer. A chemist named Felix Hoffmann, trying to find a gentler version for his father's arthritis, successfully modified salicylic acid by adding an acetyl group. This created acetylsalicylic acid, a stable and less-irritating formula that Bayer marketed as "Aspirin," transforming modern medicine forever.