Best D-Mannose Supplements 2026: Cost per Effective Dose
Top pick for D-Mannose: Nutricost D-Mannose Powder (100 g / 50 Servings) — 2,000mg per 1 scoop (2 g)/day, $0.30/day. Our pick.
All D-Mannose Supplements Compared
D-mannose labels rarely say what dose the research used. Products in this catalog run 500 mg to 2,000 mg per serving, so a serving is a unit of packaging rather than a recommended dose. Powder is substantially cheaper per gram than capsules at the higher intakes. ⚠ D-mannose is not a treatment for an established urinary infection — that needs medical assessment.
| Product | Brand | Dose / Serving | Cost / Day | Certification (as labelled) | Pick | Buy |
|---|---|---|---|---|---|---|
| NOW Foods D-Mannose 500 mg (120 Veg Capsules) | NOW Foods | 500mg / 1 capsule | $0.12 | None | Buy | |
| Nutricost D-Mannose Powder (100 g / 50 Servings) | Nutricost | 2,000mg / 1 scoop (2 g)/day | $0.30 | None | Our Pick | Buy |
| NOW Foods D-Mannose Powder, Non-GMO (6 oz / ~85 Servings) | NOW Foods | 2,000mg / 1 scoop (~2 g)/day | $0.33 | None | Buy | |
| Solaray D-Mannose with CranActin (60 VegCaps) | Solaray | 1,000mg / 2 capsules/day | $0.96 | None | Buy |
Registry check · D-Mannose
Does anyone independently verify D-Mannose supplements?
We did not find any of these products in a public registry, and none of the listings names a certification mark. Where a listing names a mark, we say so in the table; where we could not find it in a registry, we say that instead.
The 4 products on this page checked against all 5,317 US NSF, USP and Informed Sport listings, 2026-08-25. Full method and limitations.
What D-Mannose labels show
Priced per day, these D-mannose products run $0.12 to $0.96 — a 8.0× gap between the cheapest and dearest D-mannose here, across 3 brands.
Which row that favours is not obvious: NOW Foods NOW Foods D-Mannose 500 mg (120 Veg Capsules) is cheapest per serving at $0.12, but its serving sits below the median here, so part of that price gap is simply a smaller capsule.
In-Depth D-Mannose Guides
Go deeper on D-mannose — by goal, by form, and what the evidence actually supports:
Our Picks
Our Pick: Nutricost D-Mannose Powder (100 g / 50 Servings)
2,000mg per 1 scoop (2 g)/day. $0.30/day. 50 servings per container at $14.95.
The shelf · D-Mannose
These D-Mannose servings are not comparable to each other
NOW Foods D-Mannose 500 mg (120 Veg Capsules) states 500 mg a serving and NOW Foods D-Mannose Powder, Non-GMO (6 oz / ~85 Servings) states 2,000 mg, both occupy one row of the same price column. So NOW Foods D-Mannose 500 mg (120 Veg Capsules) showing $0.12 a day, the lowest here, may be reporting a smaller serving rather than a better price. Before comparing NOW Foods D-Mannose 500 mg (120 Veg Capsules) with Solaray D-Mannose with CranActin (60 VegCaps), check what each calls a serving.
Method: the 4 D-Mannose products above, compared on label facts, serving size, servings per container, form, price. Not a dosing recommendation.
How these 4 D-Mannose products were ranked
Not one of these 4 D-mannose products could be confirmed in the NSF, USP or Informed Sport registries, so verification separates none of them and the ranking falls to cost per day at the labelled serving. Commission does not enter it: the rate is the same whichever D-mannose you buy. Full methodology.