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Inositol cost-per-day calculator

Which inositol gives you the most myo-inositol per peso? Edit the price and label numbers for any brand and see the cost per gram and per day, side by side.

Editorially reviewed on October 29, 2026. [TODO: medical reviewer] How we review

Quick answer

Brands differ a lot in how much myo-inositol you get per serving, so the box price alone is misleading. One MyPicos sachet has 2 g of myo-inositol and costs ₱26.50 per sachet at Watsons; a 150 g tub of Pure Form costs ₱999 per tub. This calculator puts them on the same scale.

Inositol is a food supplement with no approved therapeutic claims in the Philippines. For PCOS (now called PMOS), the 2023 Guideline rates its benefits as limited, and experimental for fertility.

How it works

The calculator does one simple sum for each product. It multiplies the servings per pack by the milligrams of myo-inositol per serving to get the total grams of myo-inositol in the pack. It then divides the pack price by those grams. That gives the cost per gram, which is the fairest way to compare a powder tub, single sachets and chewable tablets.

It then shows the cost per day at the daily amounts that studies of myo-inositol often used, and roughly what 30 days would cost at those amounts. These figures are there so you can compare prices on equal terms. They are not a recommendation of how much you should take; that is a conversation for you and your doctor. [TODO: source] for the studied daily amounts.

Starting prices come from our price file, with the store and date for each, and you can tap a store to switch between listings. Every field is editable, so you can type the price you see today at Watsons, Hati Health, a mall store or a pharmacy, and the numbers from the label in your hand. Product labels change, so trust the label over our defaults. The Pure Form serving size in particular is an assumption until we verify it from the label. The last row is blank for any other brand, such as Wello PCOSol or an imported product.

Nothing you type is saved or sent anywhere. We count only that the calculator was used, never the numbers.

Before you buy, read our inositol buyer's guide: what the 2023 Guideline says (Rec 4.7.1 and 5.8.1), how to spot fakes on Shopee and Lazada, and why you should tell your OB-GYN about any supplement, especially with metformin or while trying to conceive.

This guide is for information. Talk to a doctor before starting or changing any treatment.

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Frequently asked questions

Why compare per gram instead of per pack?

Packs differ in size and in how much myo-inositol each serving has. Cost per gram of myo-inositol puts powders, sachets and tablets on the same scale.

Is the cheapest inositol the best?

Not necessarily. Buy from an official store or pharmacy and check the product on the FDA verification portal. A very cheap listing from an unknown seller can be fake or old stock.

Magkano ang inositol kada araw?

It depends on the brand and the amount. Use the calculator with your label. The daily amounts shown are what studies used, for comparing prices only, not advice.

Does inositol work for PCOS?

The 2023 International Guideline says it could be considered based on preference, with limited clinical benefits, and that it is experimental for fertility. It is a food supplement with no approved therapeutic claims.

Is PMOS the same as PCOS?

Yes. PMOS (polyendocrine metabolic ovarian syndrome) is the new name for PCOS, announced in The Lancet on 12 May 2026. It is the same condition with the same diagnosis and the same treatments. Both names will be used until the 2028 International Guideline update.

Sources

  1. Recommendations from the 2023 International Evidence-based Guideline for the Assessment and Management of Polycystic Ovary Syndrome. Teede HJ et al., Fertility and Sterility (co-publication), 2023.
  2. Pure Form Inositol 40:1 listing ("No approved therapeutic claims"). Watsons Philippines, 29 October 2026.
  3. Update on TGP's new inositol product (thread). r/PCOSPhilippines, May 2025.
  4. Shopee store authenticity question (thread). r/PCOSPhilippines, 2025.
  5. FDA Verification Portal. Food and Drug Administration Philippines.