8 oz (227 g), single-ingredient myo-inositol · UPC 733739005281
NOW Inositol Powder 8 oz provides 730 mg of myo-inositol per 1/4 level teaspoon, with 311 servings in the 8 oz (227 g) container, according to NOW's label. It is a single-ingredient powder, not a 40:1 inositol blend or IP6. The small label serving is not an established PCOS treatment dose.
Inositol may cause digestive upset. For PCOS or fertility concerns, discuss its use with a healthcare professional. If you are pregnant, do not start it without your prenatal clinician's guidance or use it to self-treat gestational diabetes. It should not replace prescribed care.
This review covers the 8 oz powder. The 2 oz, 4 oz and 1 lb packages are different sizes; the 311-serving count should not be applied to them.
How to measure the label serving
The teaspoon fraction measures volume; 730 mg measures weight. Use a 1/4-teaspoon measuring spoon and fill it level, as the label specifies. A rounded spoonful, an eating spoon or a scoop from another supplement is not the same measure.
The container's 311 servings are label-size portions, not a defined supply for a PCOS treatment plan. Do not use amounts from research as instructions to increase the serving.
What the PCOS guideline says
The 2023 international PCOS guideline says inositol could be considered based on individual preferences. It notes limited harms and possible improvements in some metabolic measures, but limited clinical benefit for ovulation, excess hair growth and weight.
The guideline says no specific inositol type, dose or combination can currently be recommended because the evidence is not strong enough. It considers inositol for infertility experimental. This guidance concerns inositol generally; it does not establish a fertility benefit for this exact NOW powder.
What the price per serving means
On October 15, 2026, HerbsPro listed the 8 oz powder for $20.09 before tax and shipping. Dividing $20.09 by 311 gives about $0.0646, or roughly 6.5 cents, per 730 mg label serving. The price can change.
That calculation is not a cost per research dose or prescribed regimen. Larger amounts used in research would change how long the container lasts. A low price per label serving does not establish this powder as a cheaper, effective PCOS treatment.
Independent testing and brand context
No independent test results for a finished batch of this powder have been verified for this review. That limits what can be said about a particular batch; it does not mean the product failed testing. For broader company background, see our NOW Foods brand review. Brand-level information does not confirm the contents of the container you buy.
Our editorial assessment
Supplement Explained Score
64/100
Five equally weighted criteria. This is an editorial assessment, not customer stars or a measure of medical effectiveness.
Label clarity 5/5
The 8 oz UPC, 730 mg serving, myo-inositol identity and absence of other ingredients are explicit; other package sizes are not mixed into the serving count.
Research relevance 2/5
PCOS guideline evidence is limited and does not establish a specific type, dose or combination, nor an infertility benefit for this retail powder.
Safety and cautions 3/5
Measuring a small powder amount and interpreting disease-related claims require care. Pregnancy, medical conditions and gastrointestinal tolerance warrant discussion rather than self-treatment.
Testing and quality checks 2/5
Manufacturer/GMP information does not supply an independently verified potency and contaminant result for a matched finished lot.
Value for money 4/5
At $20.09/311, a label serving is about $0.065 with no capsule burden. This is unit-price arithmetic, not a price for an effective PCOS treatment.
Based on published labels and the sources in this review. We did not buy, personally use or laboratory-test this product. Limited testing documentation is not evidence of contamination.
