WELCOME TO BIG SISTER

PCOS Is Complicated.
Support Shouldn’t Be.

If you’ve been told “just take birth control”… you’re not alone. Big Sister supports hormonal balance, menstrual regularity, and healthy ovulation with the clinically studied 40:1 MI-DCI formula.
Shop Now ↗
No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆ No Artificial Additives ◆ Vegan ◆ Non-GMO ◆ Third-Party Tested ◆

Hormone Balance Just Got Easier.

Big Sister is built around the clinically studied 40:1 Inositol ratio and designed specifically for women with PCOS. Our research-backed formula pairs thoughtfully sourced ingredients with higher-absorption capsules and third-party testing.

Hormonal Balance – Supports healthy hormone levels.
Menstrual Regularity – Supports consistent monthly cycles.
Healthy Ovulation – Supports ovulation health for women with PCOS.
Metabolic Support – Supports insulin sensitivity and metabolic health.
Shop now

Made With Powerful

Ingredients

Pure Inositol, nothing extra. No unnecessary active ingredients or additives. Thoughtfully produced in the USA.

Ingredients
40:1 RATIO
MYO-INOSITOL
D-CHIRO INOSITOL
CLINICALLY STUDIED

Made With Powerful

Ingredients

Pure Inositol, nothing extra. No unnecessary active ingredients or additives. Thoughtfully produced in the USA.

Ingredients
MYO-INOSITOL
D-CHIRO INOSITOL
40:1 RATIO
CLINICALLY STUDIED

Hormone Health Shouldn’t Be Confusing

Women with PCOS are often left navigating confusion, conflicting advice, and uncertainty. Big Sister has been there. We did the research, cut through the noise, and focused on what truly matters.

Shop now

Strong Support.
Simple Science.

Hormonal health is complex, personal, and often misunderstood. Big Sister exists to make it clearer.

Your Hormones Aren’t a 12-Step Routine

Order Now

Third-party tested. Transparent Results.

Big Sister believes transparency should be the standard. Every batch is independently tested for purity, potency, and quality so you can trust exactly what you’re putting into your body.

CLINICALLY
BACKED
Supported by 50+ clinical studies researching inositol for women with PCOS.
MADE
USA:
Manufactured in an FDA-registered, NSF-certified, GMP-compliant U.S. facility.
Review logo
Most wellness brands make me feel like I’m doing something wrong. Big Sister feels calm, informed, and reassuring.
Customer review image

Frequently Asked Questions

Take 3 capsules daily in the morning. For additional support, you may take up to 2 servings per day, or as directed by your healthcare professional.
Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven Science-Informed, Not Trend-Driven