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Oat Straw

Supplement Forms/Alternate Names:

Avena sativa


Oat straw is the hay-like grass that grows with green oats. It has been used to improve brain function and ease feelings of anxiety and stress. Oat straw can be taken as a pill, powder, or extract. It can also be made into a tea.


There aren’t any advised doses for oat straw.

What Research Shows

Not Enough Data to Assess

  • High cholesterol A1
  • Uremic pruritus B1

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

Safety Notes

It is likely safe to take oat straw in small doses for a short time. Not enough studies have been done to say whether it is safe to use for a long period.


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



A. High Cholesterol

A1. Thongoun P, Pavadhgul P, et al. Effect of oat consumption on lipid profiles in hypercholesterolemic adults. J Med Assoc Thai. 2013 Dec;96 Suppl 5:S25-32.

B. Uremic Puritis

B1. Nakhaee S, Nasiri A, et al. Comparison of Avena sativa, vinegar, and hydroxyzine for uremic pruritus of hemodialysis patients: a crossover randomized clinical trial. Iran J Kidney Dis. 2015 Jul;9(4):316-322.

Last reviewed March 2020 by EBSCO NAT Review Board Eric Hurwitz, DC  Last Updated: 6/29/2020