Meet the founder on a mission to change your monthly cycle.

Dr. Sari Eitches is a dual board-certified holistic internist who has treated thousands of patients through her training in New York and at her concierge practice at Cedars-Sinai, Los Angeles. She’s sought out by a high-profile clientele and is frequently featured in the media for her expertise in supplements and women’s wellness. She is a highly regarded consultant and thought leader in evidence-based holistic medicine.

As the trend of menstrual phase syncing — aligning one’s nutrition and exercise habits to their menstrual phases — started to gain popularity, Dr. Sari found the paradigm for her long-time recommendations for women to take certain vitamins, minerals, and herbs at corresponding times of their menstrual cycles. The concept of supplement cycling was born. We are not the same every day of the month, and our daily vitamin shouldn’t be either.

Dr. Sari saw profound benefits in her patients and was moved to formulate and patent Lunar Sync, the world’s first cycling supplement for every time of the month.

She pored over hundreds of clinical studies to develop a unique combination of supplement cycling to treat the rhythmic symptoms of menstruating women. She introduced a beta version of Lunar Sync to her practice in 2018. The results were so positive and dramatic she was moved to make these supplements accessible to all. In 2021, her current formulation was patented and proven effective in a clinical study. With that, Sari’s vision was fully realized, and Lunar Sync was officially born.

Where Lunar Sync is today

Lunar Sync is currently in a restorative pause as Dr. Sari reassesses next steps for future production. This pause allows space to listen, refine, and explore what the next evolution of the formulation may be, while continuing to support her community with transparency, clinical guidance, and trusted alternatives.

Sari remains deeply committed to women’s hormonal health and is available for select consulting, formulation guidance, and speaking engagements.