Ovasitol vs Micro Ingredients Inositol (2026)
Ovasitol by Theralogix 90-day supply and Micro Ingredients Myo & D-Chiro Inositol Powder 40:1 both deliver the 40:1 myo-to-D-chiro inositol ratio at the same total dose. Ovasitol is listed in the NSF/ANSI 173 registry and comes in a canister with a scoop; the Micro Ingredients powder costs 3.1x less per day than the pricier of the two and requires you to scoop it.
Informational comparison of label data and cost — not medical advice. Prices are per-serving figures from our last check; formulas are each brand’s published Supplement Facts.
The numbers, side by side
| Ovasitol by Theralogix 90-day supply | Micro Ingredients Myo & D-Chiro Inositol Powder 40:1 | |
|---|---|---|
| Form | Myo-inositol with D-chiro-inositol (40:1) | Myo-inositol with D-chiro-inositol (40:1) |
| Dose / serving | 2,050 mg | 2,050 mg |
| Serving size | 1 scoop (2.22 g) | 1 scoop (2.05 g) |
| Servings / container | 180 | 221 |
| Third-party cert | NSF Certified | None |
| Price | $86.68 | $34.95 |
| Cost / day | $0.96 | $0.31 |
| Buy | Check price → | Check price → |
Prices are Amazon buy-box figures ÷ pack serving count, last reviewed October 5, 2026. Formula details are each brand’s published Supplement Facts panel.
The real difference
The 40:1 ratio of myo-inositol to D-chiro-inositol is not arbitrary — it approximates the physiological ratio in plasma, and some published trials used it. Both products here hit it at the same total dose, which is the thing that actually has to match.
Ovasitol is listed in the NSF/ANSI 173 registry and comes in a canister with a scoop. Micro Ingredients is bulk powder that we did not find in a public registry, at a lower cost per day.
Who each one is for
Choose Micro Ingredients if cost per day is the priority and you are comfortable measuring a scoop without a registry listing.
Choose Ovasitol if you want a registry-confirmed product.
Our picks
Listed in the NSF/ANSI 173 registry, sold in a canister with a scoop. $0.96/day.
The same 40:1 myo/D-chiro ratio as bulk powder. $0.31/day.
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Frequently asked questions
Is Ovasitol or Micro Ingredients inositol better?
Both provide the same 40:1 myo-inositol to D-chiro-inositol ratio at the same total dose, which is the part that matters. Ovasitol is listed in the NSF/ANSI 173 registry and sold in a canister with a scoop; we did not find Micro Ingredients in a public registry, and it is bulk powder at a lower cost per day.
What is the 40:1 inositol ratio?
It approximates the ratio found in plasma, and some published trials used it. Products with a different ratio are not what those trials tested. Talk to your doctor about any use.
How long did inositol trials run?
Published trials often ran for months rather than weeks. Talk to your doctor about your own use. Over a long period, the difference in cost per day between these two products adds up.
Related
- All myo-inositol products — ranked by cost per dose
- Myo-inositol guide — dose, ratio and evidence
Sources
- Product labels: manufacturer Supplement Facts panels for both products, plus Amazon pricing from our last check.
- NSF. “Certified for Sport and Contents Certified programmes.” nsf.org
- Product labels and Amazon pricing for both products, reviewed August 2026.