How does inositol support your body during the luteal phase?

Inositol supports the luteal phase primarily by promoting healthy insulin sensitivity, which helps keep blood sugar steady during the phase of your cycle when progesterone naturally rises and metabolic swings become more noticeable.† Pink Stork's 40:1 Inositol delivers Myo-Inositol and D-Chiro-Inositol in the 40:1 ratio, the same ratio these two forms occur in naturally within the body.† Keeping that metabolic foundation steady is one piece of luteal phase support, alongside stress response support.

What inositol actually is

Myo-Inositol and D-Chiro-Inositol are two forms of inositol, a naturally occurring compound involved in cell signaling and insulin activity.† Pink Stork's 40:1 Inositol provides 2,000 mg of Myo-Inositol and 50 mg of D-Chiro-Inositol per three-capsule serving, reflecting the 40:1 ratio researchers have identified as the naturally occurring ratio of these two compounds in the body.†

The luteal phase and blood sugar

As progesterone rises after ovulation, many women notice their blood sugar feels less steady, with more pronounced cravings and energy dips in the days leading up to their period.† A broader literature review on myo-inositol's role in reproductive health, published in PMC, describes myo-inositol's involvement in insulin signaling and its role supporting reproductive and metabolic function. A separate 2023 review in the journal Gynecological Endocrinology examined myo-inositol and D-chiro-inositol combinations and their role in supporting hormonal and metabolic parameters.

"It's not a one-size-fits-all."

— Dr. Samantha Ess, ND, Naturopathic Doctor specializing in hormone health and fertility

What the research shows about this specific ratio

A 2024 study published in Gynecologic and Obstetric Investigation supplemented participants with the 40:1 ratio of Myo-Inositol and D-Chiro-Inositol for three months and measured a range of hormonal and metabolic parameters before and after treatment. Research in this space is still developing, and results vary by study population and dose, so it's worth talking with your provider about whether this ratio is a good fit for your specific goals.†

Why this matters specifically in the luteal phase

The luteal phase is when metabolic swings tend to be most noticeable, since progesterone is at its highest and insulin sensitivity naturally shifts.† Supporting a steady metabolic foundation during this window is the specific role 40:1 Inositol is formulated to play, distinct from stress response support, which is where our cortisol support supplement with organic ashwagandha comes in.†

"I've learned that the body's quiet, steady processes matter just as much as the ones we notice. Every Pink Stork formula starts with respecting that rhythm, backed by real research and covered in prayer."

— Amy Suzanne Upchurch, Founder and CEO of Pink Stork

How to take it

Pink Stork's 40:1 Inositol is taken as three capsules daily, a 30-day supply per bottle.† It is third-party tested for purity and potency, manufactured in a cGMP-certified US facility, and made without GMOs, gluten, dairy, or animal products.

Frequently asked questions

What is the 40:1 ratio in Pink Stork's Inositol?

Each three-capsule serving provides 2,000 mg of Myo-Inositol and 50 mg of D-Chiro-Inositol, a 40:1 ratio.

Is inositol the same as folate or a B vitamin?

No. Inositol is a naturally occurring compound sometimes grouped with the B vitamins because of its role in cell signaling, but it is chemically distinct from folate and other B vitamins.

How long before I notice a difference?

Research on inositol supplementation generally looks at outcomes over a period of several months, so most guidance points to consistent daily use over at least one to three cycles.† Individual results vary.

Can I take 40:1 Inositol while pregnant?

No. Per the product label, 40:1 Inositol is not intended for use while pregnant or breastfeeding. Always consult your healthcare provider before starting any new supplement.

Does 40:1 Inositol replace Cortisol Complex?

No. They support different systems, 40:1 Inositol supports metabolic function and insulin sensitivity, while Cortisol Complex supports the stress response.† Many women use both during the luteal phase.

For the full luteal phase picture, see our luteal phase support guide, and read why we recommend pairing inositol with Cortisol Complex. If stress reactivity is your bigger concern, see why stress feels harder in your luteal phase.

† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your healthcare provider before starting any new supplement, especially during pregnancy, breastfeeding, or while managing a medical condition. Keep out of reach of children.