Herb & supplement monograph

Vitamin O Drug Interactions, Uses, Safety & More

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Reviewed by licensed pharmacists Sourced from Natural Medicines
Interaction report

Drugs that interact with Vitamin O

0 medications have a known interaction with Vitamin O, graded by severity. Select any drug for the full evidence-based detail.

We don’t currently list any known drug interactions for Vitamin O. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact Vitamin O combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Vitamin O: Uses, Safety & Side Effects

The bottom line

"Vitamin O" is not a real vitamin. It is a marketing name used for liquid products typically containing saltwater (a saline solution) sold with claims of providing 'stabilized oxygen' to the body. There is no credible scientific evidence that these products work, and U.S. regulators have taken action against false advertising for them, so they are best avoided.

Part used
Not applicable (manufactured liquid product)
Common forms
Liquid drops
People commonly use it for
  • Claimed to add 'stabilized oxygen' to the body
  • General energy and wellness
  • Marketed for improved breathing or vitality

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallUse caution

Products sold as 'Vitamin O' have unproven claims and their ingredients vary, so quality and safety are uncertain.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full pregnancy detail
BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

"Vitamin O" is not an actual vitamin. There is no nutrient by this name. The term is a marketing label used by some companies to sell liquid drops that they claim deliver 'stabilized oxygen' to the body. Most of these products are mainly a saltwater (saline) solution.

Marketers have promoted Vitamin O with bold claims about boosting energy, supporting breathing, and improving overall health. These claims are not supported by reliable science. In fact, the U.S. Federal Trade Commission has taken legal action in the past against companies making unproven health claims about a product sold as 'Vitamin O.'

Because it is a manufactured product rather than a plant or recognized nutrient, the exact contents can differ from brand to brand.

Uses & effectiveness

People are sometimes drawn to Vitamin O because of advertising that promises more energy, better oxygen delivery, or general wellness. However, there is no solid scientific evidence that Vitamin O provides any of these benefits.

The core idea behind the product — that swallowing 'oxygen drops' meaningfully increases the oxygen in your blood — does not match how the body actually works. Your body gets the oxygen it needs from breathing through your lungs, not from drops taken by mouth. Drinking small amounts of an oxygen-containing liquid would not raise your blood oxygen level in any meaningful way.

In short, the evidence for any health benefit is essentially absent, and the underlying premise is not biologically plausible.

How it works

Marketers claim Vitamin O works by supplying 'stabilized oxygen' that the body can use. In reality, oxygen enters the bloodstream through the lungs when you breathe, then binds to red blood cells. Taking oxygen by mouth in liquid form does not deliver usable oxygen to your tissues this way.

Many products labeled Vitamin O are simply a dilute saltwater solution. There is no proven active ingredient or mechanism that supports the health claims made for these products. Any suggested benefit is not backed by accepted human research.

Safety & precautions

A simple saline-based liquid is unlikely to cause serious harm in small amounts for most healthy adults. The bigger concern is that people may rely on Vitamin O instead of proven treatments for real medical problems, which can be dangerous.

Because these products are loosely regulated and their exact contents are not always clear, you cannot be sure what you are getting. People with high blood pressure, heart failure, kidney problems, or anyone on a salt-restricted diet should be especially cautious because of possible sodium (salt) content.

Pregnancy and breastfeeding: There is no safety information for Vitamin O during pregnancy or breastfeeding, so it is best to avoid it. Always speak with your doctor or pharmacist before using any supplement during these times.

If you have shortness of breath, low energy, or other symptoms, see a healthcare professional rather than relying on an unproven product.

Side effects

Reliable data on side effects are lacking. Because many products are saltwater-based, the main theoretical concerns relate to sodium intake, especially for people who need to limit salt.

Some products may also contain additives or be made under poor quality controls, which could cause stomach upset or other reactions. If you experience any unusual symptoms after using a Vitamin O product, stop using it and contact a healthcare provider.

Dosing

There is no established or recommended dose for Vitamin O because it is not a recognized nutrient and has no proven benefit. Different brands give different directions, usually a set number of drops in water.

Since the product is unproven, the most cautious advice is to avoid it. If you choose to try a product anyway, follow the label exactly and check with a pharmacist first, especially if you have any health conditions.

Pregnancy & Breastfeeding

Vitamin O & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid using.

Vitamin O & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 2 sources that drive our Vitamin O monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing.

  1. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
  2. Dietary and Herbal Supplements — NIH National Center for Complementary and Integrative Health Source
Keep reading

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

Pharmacist Counseling Corner

Vitamin O: Common Questions

Does Vitamin O interact with prescription medications?
We do not currently list any known drug interactions for Vitamin O. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Vitamin O interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Vitamin O with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Vitamin O interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
Is Vitamin O a real vitamin?
No. There is no nutrient called Vitamin O. It is a marketing name used for liquid products, often saltwater, that are sold with unproven 'oxygen' health claims.
Does Vitamin O actually add oxygen to my body?
No reliable evidence supports this. Your body gets oxygen from breathing through your lungs, not from drops taken by mouth, so the central claim is not biologically plausible.
Is Vitamin O safe to take?
A dilute saltwater product is unlikely to be very harmful in small amounts, but the main risk is relying on it instead of proven care. People who must limit salt should be especially cautious.
Can I use Vitamin O if I'm pregnant or breastfeeding?
There is no safety data for these situations, so it is best to avoid it. Talk with your doctor or pharmacist before using any supplement while pregnant or breastfeeding.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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