Inositol for PCOS: The Complete South African Guide

Reviewed by Precious, One Life Health Consultant — Updated July 2026

PCOS (polycystic ovary syndrome) is a hormonal condition that affects how the ovaries work, and it's one of the most common reasons women come to see us about irregular cycles, and about supplements like inositol. It needs to be diagnosed by a doctor, and any treatment plan for PCOS itself should be managed by one too. What we can help with is understanding what inositol is, what the research looks at, and how our customers use it as part of a broader routine alongside medical care.

What is inositol, and why is it linked to PCOS?

Inositol is a naturally occurring compound, technically a sugar alcohol, that your body makes and that is also found in foods like fruit, beans, and grains. It plays a role in how cells respond to insulin. Two forms come up most often in PCOS supplements: myo-inositol and D-chiro-inositol.

In a healthy body, these two forms occur together in a specific ratio, roughly 40 parts myo-inositol to 1 part D-chiro-inositol. Research in women with PCOS has looked at whether this ratio is disrupted, and whether supplementing with both forms together, in something close to that same 40:1 ratio, supports normal insulin sensitivity and ovarian function better than either form on its own. This is the reasoning behind combination "PCOS-specific" inositol products, as opposed to plain single-ingredient inositol.

It's worth being precise about what this means in practice: inositol is studied as something that may support normal insulin sensitivity and hormonal balance as part of a broader lifestyle approach. It is not a treatment or cure for PCOS, and it does not replace medical management, particularly if you are also dealing with fertility concerns, are on medication, or have other symptoms that need a doctor's attention.

Inositol products we stock, and how they differ

Not every inositol product is built the same way, and the difference matters for PCOS specifically:

DELFRAN – Pcositol – 30 Sachets (R617.89) and Pcositol Orange & Lime – 30 Sachets (R617.89)

These are formulated specifically for this use, combining myo-inositol and D-chiro-inositol in the ratio most commonly studied for PCOS support. Each daily dose comes as a pre-measured sachet you dissolve in water, which is a convenient format if you'd rather not count capsules. This is the product most of our PCOS-focused customers reach for first.

NOW® – Choline & Inositol – 100 Veg Capsules (R395.00)

This is a different kind of product: a general choline-and-inositol combination, not a PCOS-ratio formula. Choline is a nutrient involved in normal liver and fat metabolism. Some customers use this for general wellness support rather than specifically for PCOS, so it's worth knowing it isn't the same thing as the Pcositol sachets above.

NOW® – Inositol 500 mg – 100 Veg Capsules (R375.00)

Plain myo-inositol, no D-chiro-inositol added. This suits people who want a straightforward, single-ingredient product, perhaps because a healthcare provider has recommended myo-inositol specifically, or because they want to build their own combination alongside a separate D-chiro-inositol product.

How to choose between them

• If PCOS support is your specific goal, a combined myo-inositol and D-chiro-inositol product (like the Pcositol sachets) is the one most aligned with the research on this topic.
• If you want a general wellness supplement rather than a PCOS-specific one, or your doctor has recommended plain myo-inositol, the single-ingredient capsule options are a better fit.
• Check the label for the actual milligram amounts, not just the ingredient names. Products vary in strength.
• If you are already taking other supplements, check for overlap so you're not doubling up on the same ingredient.

How it's typically used

Follow the label on whichever product you choose — doses vary by brand and format. Sachets are generally taken once daily dissolved in water; capsules are usually taken with food. Many of our customers link the habit to a fixed point in the day, like breakfast, to help with consistency.

Give it time. Hormonal and metabolic changes are gradual, and most people we speak to track how they're feeling over a few months rather than a few weeks, alongside whatever their doctor has recommended for their specific situation.

Side effects and precautions

Inositol is generally well tolerated. Mild digestive discomfort, such as nausea or an upset stomach, is the most commonly reported effect, usually at higher doses.

Because PCOS is a diagnosed medical condition, please treat this guide as background information, not a treatment plan. If you have been diagnosed with PCOS, are trying to conceive, are pregnant or breastfeeding, or are on medication (including metformin or other insulin-related medication), speak to your doctor before adding inositol to your routine. Persistent or worsening symptoms should always be checked by a healthcare professional.

Where to buy inositol for PCOS support in South Africa

All products mentioned above are available at One Life Health, in-store and online at onelife.co.za.

Visit us in-store:

• Centurion (Flagship): 117 Galway Ave, Hennopspark, Centurion, 0157 — 076 913 5059
• Glen Village (Pretoria East): Glen Village Center South, Cnr Solomon Mahlangu Dr & Olympus Dr, Faerie Glen, Pretoria, 0081 — 066 022 7457
• Edenvale (Johannesburg): Shop 7, Green Valley Shopping Centre, Stoneridge Dr, Greenstone Hill, JHB 1609 — 077 356 0173

Shop online: free delivery on orders over R400 nationwide.

Frequently Asked Questions

What's the difference between myo-inositol and D-chiro-inositol?

They're closely related compounds that occur naturally in the body in a roughly 40:1 ratio (myo to D-chiro). Research on PCOS has generally focused on supplementing both together, close to that natural ratio, rather than either one alone.

Is inositol a treatment for PCOS?

No. PCOS needs to be diagnosed and managed by a doctor. Inositol is studied as something that may support normal insulin sensitivity and hormone balance alongside medical care, not as a replacement for it.

Can I take inositol with metformin or other PCOS medication?

Speak to your doctor first. They know your treatment plan and can advise on whether it's appropriate alongside what you're already taking.

How long before I notice anything?

This varies a great deal by person. Most people we speak to give it a few months, in combination with the lifestyle and medical approach their doctor has recommended, rather than expecting a quick change.

Which product should I start with?

If PCOS support specifically is your goal, the combined myo- and D-chiro-inositol sachets are the closest match to what's been studied. If you're unsure, our in-store team is happy to talk you through the options, or point you to your doctor for anything medical.

From the apothecary shelf

A few products we'd hand a customer asking for a starting point. Not a paid placement — these are what we actually take, recommend, or keep at the front of the shelf.