NOW Inositol 500 mg Review

NOW Inositol 500 mg Veg Capsules are presented as a Cellular Health product that supports healthy membrane function. The page explains that inositol is a non-essential member of the B-complex family, with dietary sources from both animal and plant foods. The form used in this product is myo-inositol, described as the most abundant form of this nutrient. Inositol is said to be found in all cell membranes, with the highest concentrations in the brain and central nervous system, where it plays an important role in neurotransmitter signaling. The page also states that inositol is critical for the proper action of insulin, lipid metabolism, and the maintenance of cellular calcium balance. The product color is listed as off white, and the page notes that natural color variation may occur. Each bottle holds 100 veg capsules, with one capsule per serving and 100 servings per container. The suggested usage is to take 1 capsule daily as needed, and the page advises storing the product in a cool, dry place after opening. The supplement facts list 500 mg of inositol per serving, with no daily value established. The other ingredients are rice flour, hypromellose cellulose capsule, vegetable stearic acid and silicon dioxide. The label states the product is not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients, although it is made in a GMP facility that processes other allergen ingredients. Certifications listed include Halal, Intertek GMP Supplement Certification, Kosher (Triangle K), Non-GMO and Vegan. The page also lists the product as gluten free, made without dairy, eggs, nuts and soy, and as vegetarian. The product is made and quality tested in the USA with globally sourced ingredients. The bottle is noted as made from 100 percent post-consumer recycled resin, and the company describes itself as family and employee owned. The caution section advises that the product is for adults only and that people who are pregnant or nursing, taking medication, or with a medical condition should consult a physician. The page carries the standard statement that these statements have not been evaluated by the Food and Drug Administration and that the product is not intended to diagnose, treat, cure or prevent any disease.

Product Focus: Blood SugarAlso covers:HormonesMetabolismSexual health
Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$5

Study, Trial or Testing Result Summary

MembersHuman studies

human studies of inositol show blood sugar control, mainly through insulin sensitivity, but results are uniform. Nearly of the pooled analyses studied women with polycystic ovary syndrome. …

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Review Totals and Summary

Members67,573 reviews
67,573 reviews · IHerb 48,985 · Fruitfulyield 18,329 · Walmart 210 · Ebay 31 · Gnc 16

This summary compiles customer feedback on NOW Inositol 500 mg capsules, drawing from approximately 49197 ratings across various stores, with of starred reviews giving 4 or 5 stars. It focuses exclusively on the capsule form of the product, excluding feedback on other forms like gummies or powder. **What it Did for Them** customers report , particularly for hormonal balance and mood support. …

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Biohacker Summary

MembersWhat our biohacker panel says

Inositol is the only ingredient here, and the panel leans favorable: of ten, four it, and take it or discuss it with interest. The common reason is sleep, and five of them take 900 mg before bed, with one reporting deeper, quality sleep and another saying it calms mental chatter in the evening, though that person notes it is proven as a sleep aid. …

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RAL Summary

MembersThe tier and why

More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Endocrine system, Metabolic system, Reproductive system. Combine with and possible side are for members.

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Supplement Facts

Inositol 500 mg
Supplement Facts
Serving Size 1 Veg Capsule
Servings Per Container 100
Amount Per Serving% Daily Value
Inositol500 mg†
† Daily Value not established.

Other ingredients: Rice Flour, Hypromellose (cellulose capsule), Stearic Acid (vegetable source) and Silicon Dioxide.

Directions: Take 1 capsule daily as needed.

Label source: Nowfoods · Report a label change

Where to Buy

NOW · iHerb · Myvillagegreen
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Our articles on this subject

Graded October 28, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.