Short answer: Your body uses two forms of inositol, myo-inositol (dominant, supports egg quality and insulin signalling) and D-chiro-inositol (smaller amounts, insulin-related). Research favours combining them in a 40:1 ratio, mirroring the body's natural balance, too much D-chiro can be counterproductive.
The two inositols
- Myo-inositol: the most abundant form; supports ovarian function and insulin response.
- D-chiro-inositol: present in smaller amounts; involved in insulin signalling.
Why 40:1?
The body maintains roughly a 40:1 myo-to-D-chiro ratio in many tissues. Studies suggest this ratio supports cycles and ovulation best and that very high D-chiro alone may not help (and can hinder) egg quality.
Femme Flourish uses the studied 40:1 ratio rather than myo-inositol alone.
Frequently asked questions
Which inositol is best for PCOS?
The 40:1 myo-to-D-chiro combination has the strongest support.
Can you take too much D-chiro-inositol?
Possibly, high D-chiro alone may not benefit and could affect egg quality, which is why the ratio matters.
Is myo-inositol alone enough?
It is beneficial, but the 40:1 blend reflects the body's natural balance.
Education only, not medical advice. Not evaluated by the Medicines Control Council; not intended to diagnose, treat, cure or prevent any disease.


