Some say D-Mannose has practically no side effects and it is safe to take it indefinitely. Is it true? In this post I’m sharing my personal experience and feedback from readers who tried D-Mannose supplement.
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Unfortunately, FDA does not regulate food supplements. Therefore, every manufacturer makes D-Mannose from different sources:
- Some brands use additives, others don’t
- Some make D-Mannose from corn, others use birch tree juice. Third might be making an artificial version of the sugar in a lab.
- The quality of D-Mannose coming from the same producer may vary from batch to batch.
If you are experiencing problems with one brand, try another one to see if it works better for you (see my review of Top Five D-Mannose brands, 2017 that are worth spending your money on).
#1 Frequent D-Mannose side effect: diarrhea & loose stool
If you overdose on D-Mannose you will get diarrhea. I’ve learned this from my own experience and heard this many-many times from others. You might get loose stools or it could be very watery diarrhea.
What is the critical dose? For some it could be three teaspoons within a day, for others – one heaped spoon. However, in comparison to horrible side-effects from antibiotics, diarrhea is not the worst thing. Just plan to stay close to home the first day you try D-Mannose!
Finally, if you experience diarrhea as a D-Mannose side effect, just lower your dose next time.
#2 Another side effect: GI tract issues
You might experience stomach pain, bloating and indigestion. Looks like even a small dose of the powder could produce this effect. It is hard to tell if any existing conditions or diet could be a contributing factor to this problem.
Try at your own risk, but again, you could get much worse side effects when using antibiotics. Once you stop D-Mannose, the side effects should disappear.
#3 Unusual D-Mannose side effects: bladder irritation symptoms
Another side effect that some people report is that D-Mannose can irritate the bladder. Some people complain on symptoms similar to UTI when they use D-Mannose for prevention, that go away once they stop taking D-Mannose. Obviously, if you are taking D-Mannose to prevent or treat UTI, the last thing you want is UTI-like symptoms.
#4 Rare D-Mannose side effects: skin rash & itchiness
Some women experienced skin rash and itching (itchy scalp, red itchy skin) when taking the powder. Again, symptoms seem to subside and go away once they stop D-Mannose. It’s unclear if a certain brand (source of D-Mannose) might have something with this symptom or if it’s just personal sensitivity, or overdose.
#5 Unlikely D-Mannose side effects: problems when conceiving
If you are trying to conceive you might want to be careful when you take D-Mannose. Studies show that D-Mannose could bind to sperm therefore preventing it from fertilizing the egg, however in-vitro studies have so far been inconclusive and only demonstrated this effect when D-Mannose was present in unusually high concentrations. If you want to be on a safe side, avoid taking D-Mannose before “baby-making” sex or shortly after.
Hence, D-Mannose is a great product that helped many women out there, however try it at your own risk and remember to watch your symptoms carefully.
Things to remember:
- D-Mannose product differ one from another, and the quality, purity and origin may wary from brand to brand and even from a batch to a batch. Buy quality brands made in USA
- Stay at home since you might develop diarrhea
- Don’t be surprised if you feel bloated
- If you develop UTI-like symptoms while taking D-Mannose for prevention, you might want to try another brand
- If your skin is itchy, it could be one of D-Mannose side effects
- If you are trying to conceive, you might want to use something else to prevent UTI naturally
- Lastly, D-Mannose is not the only “secret” to prevent UTIs. Many doctors don’t know that special probiotics can work wonders!
Please leave your reviews and share your experiences if you noticed anything unusual while taking D-Mannose. I’m tracking all responses and updating this post often.