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Supplement Forms/Alternate Names:

Lingusticum porterColorado cough root


Osha is an herb that grows in North America and in parts of Asia. The root has been used to ease cold-like symptoms and increase hunger. It can be taken as a pill, powder, or extract. Osha can also be made into a tea.


There aren’t any advised doses for osha.

What Research Shows

Not Enough Data to Assess

There is not enough data to support that osha is helpful in treating health problems. We will review future studies as they are published.

Editorial process and description of evidence categories can be found at EBSCO NAT Editorial Process.

Safety Notes

Not enough studies have been done to say whether it is safe to take osha.


Talk to your doctor about any supplements or therapy you would like to use. Some can interfere with treatment or make conditions worse.




Last reviewed February 2020 by EBSCO NAT Review Board Eric Hurwitz, DC  Last Updated: 6/17/2020