Oregano+BlackSeed
Respiratory & Allergies

Oil of Oregano for Colds: Does It Help?

Oregano oil is a popular cold remedy. Here's what the evidence supports.

Written by Editorial TeamMedically reviewedUpdated on
Fresh oregano sprigs

Key takeaways

  • Oregano oil shows antiviral and antibacterial activity in the lab.
  • No good human trials show it shortens colds.
  • Rest, fluids and time remain the best cold treatment.

Does oil of oregano help colds?

Carvacrol and thymol have antimicrobial and some antiviral activity in lab studies.[1][2] But colds are viral and usually clear in 7–10 days; there's no solid proof oregano oil shortens them.

How people use it

  • A diluted oregano oil supplement with food at the first sign of a cold
  • Steam inhalation with a drop of oil in hot water (keep eyes closed)
  • Combined with black seed oil for broader immune support

What helps a cold

  • Rest and fluids
  • Honey for cough (not under 1 year)
  • Saline nasal spray
  • Pain relievers for aches

When to see a doctor

Black seed oil and oregano oil are not a substitute for diagnosis or prescribed treatment. See a healthcare professional if symptoms are severe, getting worse or not improving.

Frequently asked questions

Is oil of oregano a natural antibiotic?

It kills bacteria in the lab, but colds are viral. Read our guide to oregano oil as a natural antibiotic.

The bottom line

Oil of oregano is a popular cold remedy with lab support, but human proof is lacking. Rest and fluids remain key.

Laboratory research

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Sources

  1. Leyva-López N, Gutiérrez-Grijalva EP, Vazquez-Olivo G, Heredia JB. Essential oils of oregano: biological activity beyond their antimicrobial properties. Molecules. 2017;22(6):989.
  2. Suntres ZE, Coccimiglio J, Alipour M. The bioactivity and toxicological actions of carvacrol. Crit Rev Food Sci Nutr. 2015;55(3):304-318.