Ovasitol vs Micro Ingredients Inositol (2026)
Informational comparison of label data and cost — not medical advice. Prices are live per-serving figures; formulas are each brand’s published Supplement Facts.
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 used in the PCOS literature, at the same total dose. Ovasitol is NSF Certified and comes in pre-measured packets; the Micro Ingredients powder is roughly six times cheaper per day and requires you to scoop it.
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 | 2 packets | 1 scoop (2.05 g) |
| Servings / container | 90 | 221 |
| Third-party cert | NSF Certified | None |
| Price | $86.68 | $34.95 |
| Cost / day | $0.97 | $0.16 |
| Buy | Check price → | Check price → |
Prices are live Amazon buy-box figures ÷ pack serving count, last reviewed August 1, 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 is the ratio used in the trials that made inositol a standard PCOS recommendation. Both products here hit it at the same total dose, which is the thing that actually has to match.
Ovasitol adds NSF Certification and pre-measured twice-daily packets, which removes both the label-accuracy question and the scooping. Micro Ingredients is bulk powder with no third-party mark, at a fraction of the cost per day. For a supplement typically taken for many months, that difference compounds substantially.
Who each one is for
Choose Micro Ingredients if cost over a long course is the priority and you are comfortable measuring a scoop and without third-party certification.
Choose Ovasitol if you want NSF-certified verification and pre-measured packets — the format most of the clinical guidance is written around.
Worth knowing inositol is usually taken for months rather than weeks in PCOS protocols, so the cost per day gap here matters more than it would for a short course.
Our picks
NSF Certified, twice-daily packets, no measuring. $0.97/day.
The same 40:1 myo/D-chiro ratio as bulk powder. $0.16/day.
As an Amazon Associate we earn from qualifying purchases. We rank by verified label data and cost per day, never commissions.
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 NSF Certified and pre-measured into packets; Micro Ingredients is bulk powder with no certification at a small fraction of the cost per day.
Why does the 40:1 inositol ratio matter?
It approximates the ratio found in plasma and is the ratio used in the clinical work behind inositol's use in PCOS. Products that deviate from it, particularly myo-inositol alone or heavily D-chiro-weighted blends, are not what those trials tested.
How long do you take inositol for PCOS?
Protocols in the literature typically run for months rather than weeks, with cycle and metabolic changes assessed over that period. Because it is a long course, the difference in cost per day between these two products compounds considerably.
Related
- All myo-inositol products — ranked by cost per dose
- Supplements for PCOS — what the evidence supports
- Myo-inositol guide — dose, ratio and evidence
Sources
- Product labels: manufacturer Supplement Facts panels for both products, plus live Amazon pricing.
- NSF. “Certified for Sport and Contents Certified programmes.” nsf.org
- Product labels and live Amazon pricing for both products, reviewed August 2026.