JYZEN

About JYZEN

What is JYZEN?

JYZEN is an integrative medicine practice in Mill Valley, California, organized around three areas it calls Brain, Body and Biology. The Biology side, labeled Integrative Medicine on its own pages, is where hormone balancing and peptide therapy sit alongside IV medicine, diagnostics and what it calls metabolic enhancements. In its own words: "Jyzen's integrative medicine department integrates deep level diagnostics, intravenous medicine, hormone balancing, peptide therapy, infectious disease treatment, metabolic enhancements, and specialized programs aimed at optimizing biological functions."

Four people are listed as prescribers: Dr. Beth McDougall, M.D., Dr. Harris Masket, M.D., Dr. Brooke Bennis, D.O., and Dr. Maria E. Marian, ND. Peptides named include MOTS-C, CJC-1295, Ipamorelin, BPC-157, TB-500 and GHK-Cu, and metabolic therapies such as tirzepatide or retatrutide may be added when appropriate. Care is organized into set programs rather than open-ended visits: a 90-Day Metabolic Reset Program, a 12-Month Peptide Program and a 12-Month Longevity Program, with monthly virtual check-ins and lab-based adjustments built into the ongoing protocols. The practice also positions itself for people willing to travel, offering a concierge to arrange a stay in the Bay Area for someone working through a program from out of town.

What does it cost?

No consultation fee is published, and no price is given for hormone therapy, peptide protocols or the weight loss medications it mentions. The programs are structured in blocks of time, 90 days or 12 months, but what any of those blocks actually cost is not stated anywhere public. It does not say whether insurance is accepted, and there is no published policy on canceling a program once you've started.

Before you book, ask for the full price of whichever program you're considering, in writing, and ask directly whether that number includes the medication itself or only the visits, labs and check-ins around it.

What should you ask before you book?

Four prescribers with four different credentials work here, an M.D., another M.D., a D.O. and a naturopathic doctor, and their scope of practice differs by license. Ask who specifically will review your labs and sign your prescription for you. Ask whether the peptides used, such as BPC-157, TB-500 or CJC-1295, are compounded, and by which pharmacy, since that detail isn't published. Ask for the total cost of a 90-day or 12-month program before you sign anything, what happens if you want to stop partway through, and whether the monthly virtual check-ins are part of that price or billed on top of it. If you're traveling in, ask what the concierge arrangement costs beyond the medical care itself.

Who is it a good fit for?

This is a good fit if you want one Bay Area practice that ties hormone balancing, peptide protocols and longevity planning together under one roof, and you're willing to call and get real numbers before committing to a 90-day or 12-month program.

Sources: jyzen.com, jyzen.com/pages/12-month-peptides-for-metabolism, jyzen.com/pages/longevity-program

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