Polysaccharide-K (PSK): The Mushroom Molecule Changing Modern Medicine

# Polysaccharide-K (PSK): The Mushroom Molecule Changing Modern Medicine

## Summary

Polysaccharide-K better known as PSK or Krestin might sound like something from a lab, but its story starts in the forest. Extracted primarily from the turkey tail mushroom (Trametes versicolor), a staple of traditional medicine for centuries, PSK is one of the most researched natural compounds in the world. What makes it remarkable isn’t just where it comes from but how it works. Most nutrients do one thing. PSK does many. It’s a protein-bound polysaccharide a hybrid of complex sugars (polysaccharides) and proteins designed by nature to interact with multiple systems at once. Scientists call this a “biological response modifier,” meaning it helps the body respond better: sharper immune defense, steadier inflammation control, and broader cellular support.

## Benefits

Japan recognized its potential decades ago. Since the 1970s, PSK has been approved there as an anticancer drug and used alongside chemotherapy and radiation. It’s a rare example of a traditional remedy validated by rigorous modern research.

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