Ovasitol vs Wholesome Story Inositol: Which Is Better? (2026)
Buy Ovasitol. Its label tells you to take 4 g a day, and that costs $0.96. Wholesome Story’s 180-scoop powder costs the same and is also on NSF/ANSI 173, so either is a good powder buy. Wholesome Story’s capsules cost $1.86 a day, about twice as much. Buy them if you would rather swallow capsules than mix a powder.
By Erin Rose Updated October 26, 2026 Methodology
Same score. Cost decides it. Ovasitol costs about half as much a day as Wholesome Story’s capsules. Wholesome Story’s 180-scoop powder ($85.95) costs the same a day as Ovasitol, and NSF lists it too. Ovasitol’s edge: its label says 2 scoops a day, while the powder’s says 1 to 2 servings as needed, and Ovasitol also comes in single-serving packets. See every size and price.
How we checked
- 5
- testing lists searched for each product
- 2
- labels read in NIH’s database, one for each
- 7
- sizes priced at the two brands’ own stores
- 4 g
- a day: the dose we used to compare cost
How do they compare?
| Ovasitol | Wholesome Story capsules | |
|---|---|---|
| A serving | 1 scoop | 4 capsules |
| Myo-inositol per serving | 2 g | 2 g |
| D-chiro-inositol per serving | 50 mg (40:1) | 50 mg (40:1) |
| For 4 g a day | 2 scoops | 8 capsules |
| What the label says to take | 2 scoops a day (4 g) | 4 capsules a day (2 g) |
| Other ingredients | Nothing else | Rice flour, capsule shell |
| Testing list | NSF/ANSI 173 | NSF/ANSI 173 |
| Cost for 4 g a day | $0.96 | $1.86 |
Is either one third-party tested?
Both are. NSF/ANSI 173 lists Ovasitol and Wholesome Story’s capsules and powder by name. It checks that the label is accurate and that contaminants stay under set limits. Theralogix’s store calls Ovasitol “the first and only 40:1 inositol supplement that’s independently tested and certified by NSF International.” NSF also lists Wholesome Story’s 40:1 capsules and powder.
| Testing list | Ovasitol | Wholesome Story |
|---|---|---|
| NSF/ANSI 173 | Listed | Listed |
| NSF Certified for Sport | Not found | Not found |
| Informed Sport | Not found | Not found |
| Informed Choice | Not found | Not found |
| USP Verified | Not found | Not found |
Check them yourself: NSF’s list for Theralogix and for Wholesome Story. More on every tested myo-inositol: third-party tested myo-inositol.
Are the amounts the same?
Yes. Each serving has 2 g of myo-inositol and 50 mg of D-chiro-inositol. The difference is how much each label tells you to take. Ovasitol’s says 2 scoops a day, which is 4 g, the amount many trials used. Wholesome Story’s bottle label says 4 capsules, which is 2 g. Its store now says up to twice that, and NSF’s listing gives 8 capsules a day.
What the price gap costs you
Wholesome Story’s capsules cost about 1.9 times as much. At each brand’s own list price, 4 g a day costs $0.96 with Ovasitol and $1.86 with the 120-capsule bottle: $352 against $680 a year, about $328 more. Even Wholesome Story’s 360-capsule bottle costs more a day than Ovasitol.
| Size | List price | 4 g a day | A year |
|---|---|---|---|
| Ovasitol, canister, 180 servings | $86.68 | $0.96 | $352 |
| Wholesome Story, 120 capsules | $27.95 | $1.86 | $680 |
| Wholesome Story, 360 capsules | $69.95 | $1.55 | $567 |
| Wholesome Story powder, 30 scoops | $27.95 | $1.86 | $680 |
| Wholesome Story powder, 90 scoops | $69.95 | $1.55 | $567 |
| Wholesome Story powder, 180 scoops | $85.95 | $0.96 | $349 |
Wholesome Story’s store shows $0.93 a day for the 120 capsules because it prices 4 capsules (2 g), not 8. Ovasitol also comes in single-serving packets: $102.78 for a 90-day supply at its store, or $1.14 a day. Every myo-inositol we price: myo-inositol cost per dose.
How do they score?
The same: 8.0 out of 10 each, for dose, testing, label and recall record. Neither scores well on cost, because some 40:1 powders on no testing list cost much less. So cost decides it between these two: Ovasitol gives 4 g for about half the price of the capsules. How we score. All of them, ranked: the best myo-inositol.
Who should buy which
- Most peopleOvasitol
About half the cost a day of the capsules. Take two scoops a day, as its label says. Check the price.
- You would rather swallow capsules than mix a powderWholesome Story capsules
Also on NSF/ANSI 173. You pay more and take 8 capsules for 4 g. Check the price.
- You want to try it before buying 90 days’ worthWholesome Story capsules
The 120-capsule bottle costs $27.95. At 4 g a day it lasts 15 days. At the label’s 2 g a day it lasts 30 days. Check the price.
- You do not need the D-chiro-inositolPlain myo-inositol
It costs less than either. See our plain pick in the best myo-inositol.
- You already have a tub or bottle of either oneBuy nothing yet
Finish it. Each serving has the same amounts.
- You are pregnant, trying to get pregnant, or take a prescription medicineAsk your doctor first
Check with your doctor before you start if you are pregnant, breastfeeding or trying to get pregnant, if you take lithium or valproate, or if you take a prescription medicine such as metformin or another diabetes medicine.
Does one work better than the other?
No trial has compared these two brands. Each serving has the same amounts, so there is no reason to expect one to work better.
Most inositol trials were small, and they studied different groups of women. The review behind the 2023 international PCOS guideline looked at 30 trials and called the evidence “limited and inconclusive” (Fitz 2024). A 2025 trial of 464 pregnant women with PCOS found no drop in the combined rate of gestational diabetes, preeclampsia and preterm birth: 25.0% with myo-inositol and 26.8% with a placebo (van der Wel 2025). The 40:1 ratio is common, but it rests on two small trials by one author. No large trial shows a 40:1 blend beats plain myo-inositol. More on the research.
Questions
Is Ovasitol or Wholesome Story better?
Buy Ovasitol. Its label says 2 scoops (4 g) a day, which costs $0.96. Wholesome Story’s 180-scoop powder is just as good a buy: the same cost a day and the same NSF listing. Its capsules cost $1.86 a day for 4 g. Buy them if you would rather not mix a powder.
How many Wholesome Story capsules make 4 g?
Eight. Each capsule has 500 mg of myo-inositol, so the 4 capsules on its bottle label give 2 g.
Is Wholesome Story NSF certified?
Yes. NSF/ANSI 173 lists its 40:1 capsules and its 40:1 powder, the same list Ovasitol is on.
Sources
- Ovasitol: NSF/ANSI 173 listing for Theralogix (info.nsf.org); NIH Dietary Supplement Label Database, label 272224; theralogix.com list prices.
- Wholesome Story: NSF/ANSI 173 listing (info.nsf.org); NIH Dietary Supplement Label Database, label 288163; wholesomestory.com capsule and powder list prices and directions.
- Fitz V, et al. Inositol for polycystic ovary syndrome: a systematic review and meta-analysis to inform the 2023 update of the International Evidence-based PCOS Guidelines. J Clin Endocrinol Metab. 2024;109(6):1630-1655. PubMed 38163998
- van der Wel AWT, et al. Myo-inositol supplementation to prevent pregnancy complications in polycystic ovary syndrome: a randomized clinical trial. JAMA. 2025;334(13):1151-1159. PubMed 40920401
- Ratio trials: Nordio M, Proietti E. Eur Rev Med Pharmacol Sci. 2012;16(5):575-81. PubMed 22774396; Nordio M, et al. Eur Rev Med Pharmacol Sci. 2019;23(12):5512-5521. PubMed 31298405
- Scores updated October 13, 2026. Product photos: Amazon, shown under the Associates program license.