Stool form and regularity
Global Healing Oxy-Powder Ozonated Magnesium Oxide
A magnesium oxide capsule taken at bedtime two to three nights a week, in an ozonated form with citric acid, for occasional constipation and bloating.
- Format
- Capsule
- Type
- Magnesium
- Cost
- $1.67 per four-capsule serving, taken 2 to 3 nights a week
- Customer rating
- 4.6 out of 5 from 19,004 ratings from Amazon
What customers consistently report
- Working overnight for constipation
- A gentle effect without cramping for many people
- A few-nights-a-week routine kept up for years
Those are the themes that recur across the reviews. Moderate review confidence — Amazon shows 4.6 from 19,004 ratings as an independent figure, the brand’s own widget shows 4.8 from about 11,700 reviews with 8.7% of those retrieved flagged as rewarded with loyalty points, and Trustpilot shows 3.4 from 309 reviews for the whole brand rather than this product.
Why it might work
Magnesium oxide is poorly absorbed, and the magnesium left in the intestine holds water there, which softens stool and speeds its passage; this osmotic action is why magnesium salts are used as laxatives. The brand adds that stomach and citric acid break the ozonated oxides down to release oxygen that loosens impacted waste, and no study of that step was found. One serving carries 1,400 mg of magnesium, four times the 350 mg a day the NIH sets as the upper limit for supplemental magnesium, a limit based on diarrhea, which is the intended effect here; the NIH notes magnesium toxicity risk rises with impaired kidney function. Magnesium can also lower the absorption of some antibiotics and osteoporosis drugs, which the NIH advises spacing by hours.
What the research supports
No published trial of Oxy-Powder or of ozonated magnesium oxide was found. The brand links a 50-person, 7-day consumer survey run by Citruslabs with no placebo group, in which 95% of respondents agreed their constipation had been relieved and bowel movements a week rose 85%, at an average of about 3.6 to 3.9 capsules a night. Two placebo-controlled trials in Japan of plain magnesium oxide at 1.5 g a day for 28 days found 70.6% against 25.0% overall improvement in 34 women and 68.3% against 11.7% in 90 adults, and one Oxy-Powder serving (1,400 mg magnesium, about 2.3 g of magnesium oxide) is about 1.5 times the magnesium in that dose.
What the label discloses
The panel lists magnesium from ozonated magnesium oxides at 1,400 mg and natural citric acid at 90 mg, with a cellulose capsule and organic gum acacia, and no proprietary blend. No oxygen content or specification for the ozonated material is printed, and the 350% daily value uses the older 400 mg reference. The brand describes third-party testing without naming a laboratory, and the bottle carries a Non-GMO Project Verified mark.
Who this tends to suit
We match this product to people reporting constipation, irregular bowel habits and bloating. It fits someone whose priority is regularity or resetting after a course of antibiotics or an upset. Whether it is the best fit for you depends on the rest of your answers — what you have already tried, what format you will take, and anything that has to be ruled out.
Where it may not fit
The label supports gluten-free, vegan and minimal ingredient list. We flag this product for anyone pregnant or breastfeeding or taking prescription medication, and the quiz removes it rather than recommending it in those cases. That is a caution about who should be deciding, not a claim about the product. A capsule only works if you will take it as often as the label directs.
Side effects and what to be aware of
Most of the one- and two-star reviews on the brand’s page (428 of 11,659 reviews) say it did not work, and a smaller share describe cramps, nausea, vomiting or gas; some mention a formula change or a higher price. The label says to consult a provider with a history of cardiac or kidney disease, and the brand’s own directions say to increase the dose by two capsules a night until three to five bowel movements are reached, which takes the serving further above the NIH upper limit.
Common questions
Does Oxy-Powder work for constipation?
No published trial of Oxy-Powder was found. The brand’s own 50-person, 7-day survey with no placebo group found 95% agreed their constipation had been relieved. Plain magnesium oxide at 1.5 g a day beat placebo in two Japanese trials (70.6% against 25.0% in 34 women; 68.3% against 11.7% in 90 adults), and one Oxy-Powder serving is about 1.5 times that magnesium. On Amazon it is 4.6 from 19,004 ratings, and most of the brand’s one- and two-star reviews say it did not work.
Is Oxy-Powder safe, and what are its side effects?
One serving carries 1,400 mg of magnesium, four times the 350 mg a day the NIH lists as the upper limit for supplemental magnesium, and the NIH says high doses often cause diarrhea, nausea and cramping. Reviewers report cramps, nausea, vomiting and gas, and the label says to consult a healthcare provider with a history of cardiac or kidney disease. The NIH notes that the risk of magnesium toxicity rises with impaired kidney function.
How do I take Oxy-Powder, and how often?
The label says four capsules at bedtime with a full glass of water, at least two hours after the last meal. If three to five bowel movements are not reached the next day, it says to add two capsules each night until they are, and to take it two to three times a week. In the brand’s survey participants took about 3.6 to 3.9 capsules a night for seven days, with a maximum of seven.
How much does Oxy-Powder cost?
The 120-capsule bottle is $49.95 on the brand’s site and Amazon, which is $1.67 a serving, and the 60-capsule bottle is $29.95 ($2.00 a serving). Subscribing takes 15% off ($42.46 for 120 capsules, $1.42 a serving). At the label’s two to three nights a week, a bottle lasts 10 to 15 weeks, about $0.48 to $0.71 a day.
Oxy-Powder vs MagO7: what is the difference?
Both list magnesium from ozonated magnesium oxides at about 350 mg of elemental magnesium per capsule (Oxy-Powder 1,400 mg in four capsules; MagO7 1,035 mg in three). MagO7 costs $0.93 a serving for 90 capsules against $1.67 for Oxy-Powder’s 120, and has no study of its own, while Oxy-Powder has one uncontrolled seven-day survey. Oxy-Powder’s refund window is one year with a $9.99 return charge; MagO7’s is 60 days with shipping not refunded.
Before you take this. Speak to a doctor or pharmacist first if you are pregnant or breastfeeding, or taking prescription medication. Nothing on this page is medical advice, and no supplement diagnoses, treats, cures or prevents disease.
Is this the right one for you?
The quiz works out which of the products we have researched fits your symptoms, your routine and what you have already tried — and tells you plainly if none of them do.
Take the quiz →Free. Private. Nothing to sign up for.
Others we researched for the same job
These sit in the same role as Global Healing Oxy-Powder Ozonated Magnesium Oxide — stool form and regularity — so they are the sensible things to weigh it against.
See all the products we have researched →
Related reading
Background on how this type of product works, read from the trial evidence.