Choosing the right Vitamin B8 (inositol) supplement matters whether you’re managing PCOS, supporting ovarian function, or looking for cognitive and metabolic support. This guide distills extensive research, hands-on testing, and expert reviews to recommend the best inositol options across formats, price points, and use cases.
How we tested and what we considered
What we looked for:
- Ingredient profile & potency: Myo‑inositol and D‑chiro‑inositol ratios (40:1 is commonly studied), milligrams per serving, and presence of synergistic nutrients (folate, vitamin D3, DIM, berberine, etc.).
- Form & bioavailability: Capsules, gummies, liquids, and blended formulas — and whether the forms are vegan/vegetarian or include absorption enhancers.
- Quality & transparency: GMP manufacturing, third‑party testing, clear labeling (no hidden fillers), and USA manufacturing when possible.
- Real‑world factors: Price per serving, count per bottle, taste/texture for chewables or liquids, and consumer feedback on tolerability.
- Clinical relevance: We prioritized formulations and doses aligned with clinical studies (notably 2 g myo‑inositol + 50 mg d‑chiro per serving for many women’s health outcomes).
Process: We screened dozens of market offerings, cross‑checked ingredient panels and labels, read independent lab/test disclosures, and weighed verified customer feedback. Final picks balance clinical dose, formulation quality, price, and user experience.
NOW Inositol 500mg
A straightforward, no‑frills myo‑inositol option in vegan capsules. With 500 mg per capsule and a trusted GMP background, this is an economical way to add inositol to your routine or stack it with complementary supplements.
NOW Inositol 500 mg — Best Budget Pick
Why we picked it
NOW Foods delivers a simple, reliable myo‑inositol product at a very low price. The product is vegan, non‑GMO, and packaged by a well‑established manufacturer with GMP practices.
Standout features & analysis
- Pure myo‑inositol at 500 mg per veg capsule, letting you titrate dose precisely.
- Kosher, soy‑free, vegan — minimal allergen risk.
- Excellent for users who want to test inositol or combine it with D‑chiro supplements or other nutrients.
Who it’s best for
- Budget‑minded users wanting a trusted brand and flexible dosing.
- People who already use multicomponent hormonal support and need a low‑cost myo‑inositol base.
Potential drawbacks
- Lower per‑capsule dose means taking multiple capsules to reach the clinically studied 2 g serving. No added synergists (folate, vitamin D, etc.).
Micro Ingredients Inositol Complex
A premium, research-minded myo & D‑chiro inositol blend delivering 2,050 mg per serving with Vitamin C, active folate, DIM and CoQ10. Large 240‑count veggie capsule supply with clean, filler‑free sourcing for sustained daily use.
Micro Ingredients Inositol Complex — Premium Choice
Why we picked it
This formula pairs the clinically used 40:1 ratio (myo:d‑chiro) at an effective 2,050 mg serving with several supportive nutrients—active folate (L‑5‑MTHF), DIM, CoQ10 and vitamin C—making it a premium all‑in‑one option.
Standout features & analysis
- 2,050 mg per serving at a true 40:1 ratio; suitable for the evidence‑backed dosing many clinicians recommend.
- 240 veggie capsules provide a long supply and good per‑dollar value for a premium blend.
- Clean, filler‑free, non‑GMO, and third‑party tested claims add confidence.
Who it’s best for
- Users wanting a clinically meaningful dose with additional antioxidants and metabolic support.
- Those preferring a single, high‑count bottle to reduce reorder frequency.
Potential drawbacks
- More expensive than basic single‑ingredient powders or capsules; may be more than some need if you only want pure inositol.
Dorado Inositol 2050mg
A focused myo‑ and d‑chiro‑inositol formula delivering the standard 40:1 ratio at 2,050 mg per serving with 120 capsules. Manufactured in a GMP facility in the USA and third‑party tested, offering a solid balance of potency and price.
Dorado Inositol 2050 mg — Best Value for Money
Why we picked it
This product gives the clinically‑supported 40:1 dose (2,000 mg myo + 50 mg d‑chiro equivalent) in a competitively priced 120‑count bottle. It’s third‑party tested and made in the USA—features that matter for long‑term use.
Standout features & analysis
- 2050 mg per serving in the ideal 40:1 ratio for hormone and ovarian support.
- 120 capsules offers a convenient month(s) supply depending on dosing regimen; priced to beat many premium blends.
- Strong manufacturing claims (GMP, third‑party testing).
Who it’s best for
- Users seeking the evidence‑based therapeutic dose without premium add‑ons.
- Those who want a reliable, lab‑tested product made in the USA.
Potential drawbacks
- Straightforward formula with fewer added supportive ingredients compared with premium blends; fewer botanical extras if you prefer a multi‑ingredient stack.
Parrox 16-in-1 Inositol
An all‑in‑one 16‑ingredient formula combining myo & d‑chiro inositol with adaptogens, berberine, DIM, vitamins D3/K2, methylated B12 and folate. Designed for users who want hormonal, metabolic and mood support in a single vegan capsule.
Parrox 16‑in‑1 Inositol — Editors Choice
Why we picked it
Parrox combines targeted inositol dosing with a thoughtful complement of botanicals and bioavailable vitamins to address hormonal balance, metabolic health, and absorption. It’s ideal for someone wanting to simplify a multi‑product stack.
Standout features & analysis
- Multi‑nutrient formula with DIM, berberine, Ashwagandha, Ceylon cinnamon, methylfolate, methylcobalamin (B12), D3/K2 and Bioperine for absorption.
- 90 vegan capsules (30‑day supply): good for trialing a concentrated, combined approach.
- USA‑made, non‑GMO, and focused on clean formulation.
Who it’s best for
- Users who prefer a consolidated, research‑minded blend rather than buying many individual supplements.
- Those interested in metabolic and mood support alongside ovarian/hormonal balance.
Potential drawbacks
- A blended formula increases complexity—if you react to any single botanical, the multi‑ingredient approach complicates diagnosis.
- Shorter supply per bottle (90 caps) at a mid‑range price compared with single‑ingredient bulk options.
Side‑by‑side overview
Quick comparison:
- NOW Inositol 500 mg — Pure myo‑inositol, lowest cost, flexible dosing (Best Budget Pick). Ideal to test or stack.
- Micro Ingredients Inositol Complex — High‑dose, research‑aligned 2,050 mg serving with active folate, DIM, CoQ10; large 240‑count supply (Premium Choice).
- Dorado Inositol 2050 mg — Clinically relevant 40:1 dose, made in the USA and third‑party tested; best blend of potency and price (Best Value for Money).
- Parrox 16‑in‑1 Inositol — Multi‑ingredient formula that simplifies a complex regimen; great for users wanting broad support (Editors Choice).
Best overall: For most users seeking an evidence‑based inositol with good quality and value, the Dorado 2050 mg formulation is the strongest balance of clinical dose, testing, and cost. Premium users who want extras and long supply should consider Micro Ingredients. If you prefer an all‑in‑one botanical plus nutrient approach, Parrox is the best consolidated option.
Final recommendation
After rigorous review of ingredient quality, dosing, manufacturing transparency, real‑world usability, and price, these picks cover the needs most readers will have:
- Choose Dorado Inositol 2050 mg if you want the best combination of clinical dosing, quality assurances, and value.
- Choose Micro Ingredients if you prefer a premium, high‑count bottle with additional supportive nutrients and clean sourcing.
- Choose Parrox if you want a single, comprehensive formula that addresses hormonal balance and metabolic support together.
- Choose NOW Foods if you’re budget‑conscious or want a pure, flexible myo‑inositol base.
This guide is grounded in ingredient analysis, clinical dose alignment, product transparency, and consumer experience. Match your choice to your goals (pure dose vs. multi‑nutrient support, long supply vs. trial), and consult your healthcare provider—especially if you’re pregnant, nursing, on medication, or managing endocrine conditions. Armed with this information, you can pick an inositol product that fits your priorities and lifestyle.