NOW Foods sells one of the best-value tubs of inositol powder you can buy: a pound of pure powder that lasts well over a year at the label serving. So why would anyone pay more for a sachet? It's a fair question, and here's an honest answer. Full transparency: we make Regüsk Inositol Powder. This comparison uses each product's published label.
The quick answer
- Choose NOW Foods if you want pure myo-inositol at the lowest cost per gram and you're happy to measure it yourself.
- Choose Regüsk Inositol Powder if you want a 40:1 myo and d-chiro blend with 6 Super minerals, folate and magnesium, pre-measured and flavoured- convenience + deep impact.
Regüsk Inositol Powder vs NOW Foods: side by side
Based on each product's label, October 2026. Always check the current label before buying.
| Regüsk Inositol Powder | NOW Foods Inositol Powder (1 lb) | |
|---|---|---|
| Format | Pre-measured 4g sachet | 454g tub, measured by teaspoon |
| Form of inositol | Myo + d-chiro at 40:1 | Myo-inositol only |
| Label serving | 1 sachet: 1,100mg myo + 27.5mg d-chiro | 1/4 level teaspoon: 730mg |
| Servings per day (label) | 1 | 1 |
| Servings per container | 30 | About 622 |
| Also contains | L-methylfolate 440mcg, magnesium glycinate, ashwagandha, chaste berry, maca, vitamin B6 | Nothing |
| Flavour | Blackberry lemon | Unflavoured |
| Label claims | Vegan, non-GMO, third-party tested by Eurofins | Vegan, non-GMO, kosher, GMP quality assured |
Where NOW Foods wins
Cost per gram
Nothing in a sachet will match a one-pound tub for value. If your only goal is pure inositol at the lowest price, NOW Foods is the sensible choice, and it comes from a long-established brand.
Dose freedom
With a tub you can measure whatever amount you and your practitioner settle on, from the 730mg on the label up to the gram-level amounts used in many studies.
Simplicity
It's one ingredient. If you can't take botanicals, or you're pregnant, breastfeeding or trying to conceive, a single-ingredient powder is a much simpler conversation with your doctor.
Where Regüsk Inositol Powder is different
40:1, not myo-only
NOW's powder is myo-inositol on its own. Regüsk Inositol Powder pairs myo-inositol with d-chiro-inositol at 40:1, the ratio normally found in the blood (Nordio et al., 2019). To be fair, myo-inositol alone is also well studied, and the 2023 international PCOS guideline says the evidence isn't strong enough to recommend one specific type, dose or combination (Teede et al., 2023).
No measuring
A quarter of a level teaspoon is a small amount to measure accurately every day, and a larger dose means several teaspoons. A sachet is the same amount every time, with nothing to level off.
A formula, not a single ingredient
If you'd also buy folate and magnesium, a tub is the first of three products. Regüsk Inositol Powder includes active L-methylfolate and magnesium glycinate with a small botanical blend. See why we add botanicals to inositol powder, including what the research does and doesn't show.
Taste and portability
A one-pound tub lives in your kitchen. A sachet goes in your bag, and blackberry lemon is easier to look forward to than plain powder.
The honest part
Per gram of inositol, Regüsk Inositol Powder costs more. What you're paying for is the 40:1 blend, the extra actives, the flavour and the pre-measured format. If none of those matter to you, buy the tub. The best inositol powder is the one you'll take every day for the two to three months it deserves, and for some people that's a tub and a teaspoon.
Which inositol powder should you choose?
- Lowest cost, pure myo-inositol: NOW Foods.
- You want to set your own dose: NOW Foods.
- You want 40:1 with folate and magnesium in one step: Regüsk Inositol Powder.
- You've bought a tub before and stopped using it: Regüsk Inositol Powder.
For more options, see our six-brand inositol powder comparison.
Try Regüsk Inositol Powder
One blackberry-lemon sachet a day, nothing to measure. Shop Regüsk Inositol Powder with free shipping and a 100-day guarantee.
Sources
- NOW Foods Inositol Powder, 1 lb (454 g): label details as listed by Vitacost. Accessed October 2026.
- Teede HJ, et al. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. J Clin Endocrinol Metab. 2023;108(10):2447–2469. doi:10.1210/clinem/dgad463
- Nordio M, Basciani S, Camajani E. The 40:1 myo-inositol/D-chiro-inositol plasma ratio is able to restore ovulation in PCOS patients: comparison with other ratios. Eur Rev Med Pharmacol Sci. 2019;23(12):5512–5521. PubMed
This article is for general information only and isn't medical advice. Regüsk Inositol Powder is a dietary supplement and is not intended to diagnose, treat, cure or prevent any disease. NOW is a trademark of its owner, and Regüsk is not affiliated with NOW Foods. Comparison details were taken from the published label at the time of writing, so check the current label before buying. Talk to your healthcare professional before starting any supplement.