White Willow Bark

• Willow treepussy willow image by Ruta Saulyte from Fotolia.com
  
  White willow bark produces a substance called salicin. When it's metabolized, it converts to a substance called salicylate. This is the chemical that is the active ingredient of white willow bark tea.
  
  

Aspirin

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  Aspirin is made of the salicylate derived from the willow bark with a chemical tag called acetyl. The acetyl is combined with the salicylate to form the active ingredient in aspirin, which is acetylsalicylate.
  
  

Action

• Salicylate blocks the messenger molecules called prostaglandin. Prostaglandin is what causes you to have a fever when you've contacted bacteria and triggers inflammation in response to sunburn, arthritis, insect stings or injuries. White willow bark has the same properties.
  
  

Side Effects

• White willow bark causes severe gastric distress. Hippocrates knew this in 400 B.C. when it was used by the ancient Greeks. Aspirin is a blood thinner and should be used with caution if you are on other medication.
  
  

Difference

• The main difference between aspirin and white willow bark is acetyl. In the late 1800s, scientists discovered that combining acetyl with salicylate prevented the gastric distress caused by salicylate. This allowed aspirin to become a viable and marketable product.