Size
Osavi D-Mannose Powder
A plain D-mannose powder, so the dose can be measured out by the spoonful.
What it is
- D-mannose, 2000mg per serving
- Powder format, dissolves in water
- D-mannose is a monosaccharide the body also makes in small amounts
How to use
Take as directed on the pack. Stir into water or a cold drink.
Good to know
- Suitable for vegans
- Suitable for vegetarians
A food supplement, not a substitute for a varied diet and healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.
At a glance
£0.39
per daily dose
Insufficient
evidence for d-mannose
Our honest take
Plain D-mannose powder at 2,000 mg per serving, the amount used in the main trials, so a 120 g tub gives about 60 servings at roughly 40p each. The largest and best-run trial, published in the UK in 2024, found it made no difference compared with placebo, and there are no authorised claims, so we make no claims about urinary infections. If you have symptoms of an infection, see a pharmacist or GP.
- You have discussed D-mannose with your GP and want the studied 2 g amount
- You prefer a vegan powder you can measure out
- You have diabetes or take diabetes medicines, unless your GP or diabetes team agrees (it is a sugar)
- You have symptoms of an infection right now: see a pharmacist or GP
- You are pregnant or buying for a child, without medical advice
The science
D-mannose· evidence: Insufficient
D-mannose is a simple sugar related to glucose, found in small amounts in fruit such as cranberries. Most of it passes into the urine rather than being used for energy.
It is sold for urinary health. Early small trials were encouraging, but a large, well-run UK trial published in 2024 found it made no difference compared with placebo. There are no authorised health claims for D-mannose, so we make no claims about what it does. If you have pain or burning when weeing, a fever or blood in your urine, see a pharmacist or GP.
Typical dose: Studies have used 2 g a day.
Safety: It is a sugar: if you have diabetes, check with your GP or diabetes team first and monitor your blood glucose. High doses can cause bloating and loose stools. Not a substitute for antibiotics when they are needed. Ask your GP before use in pregnancy or for children.
Research we looked at:
Hayward G et al. (2024). d-Mannose for prevention of recurrent urinary tract infection among women: a randomized clinical trial. JAMA Internal Medicine 184(6):619-628.
Kranjčec B, Papes D, Altarac S (2014). D-mannose powder for prophylaxis of recurrent urinary tract infections in women: a randomized clinical trial. World Journal of Urology 32(1):79-84.
NICE (2018). Urinary tract infection (recurrent): antimicrobial prescribing (NG112).
Ingredients & nutrition
Always check the pack you receive, as manufacturers sometimes update recipes.
How to use
Price per dose & how it compares
| Product | Size | Price | Per daily dose |
|---|---|---|---|
| This product | 2000mg - 120 grams | £23.99 | £0.39 |
| NOW Foods D-Mannose | from £17.60 | – | |
| BioTechUSA Cranberry Complex | from £14.99 | £0.50 |
Cost per daily dose lets you compare packs of different sizes fairly.Worked out from our current prices.
Food supplements should not replace a varied, balanced diet and healthy lifestyle. General information, not medical advice. Speak to your GP or pharmacist first if you are pregnant or breastfeeding, have a medical condition or take medication.
A plain D-mannose powder, so the dose can be measured out by the spoonful.
What it is
- D-mannose, 2000mg per serving
- Powder format, dissolves in water
- D-mannose is a monosaccharide the body also makes in small amounts
How to use
Take as directed on the pack. Stir into water or a cold drink.
Good to know
- Suitable for vegans
- Suitable for vegetarians
A food supplement, not a substitute for a varied diet and healthy lifestyle. Do not exceed the stated dose. Keep out of reach of children.
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