Brilliant Health Institute - Dr. Claudia Arregoytia

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Brilliant Health Institute - Dr. Claudia Arregoytia

Functional Medicine Doctor. Personalized Solutions for Optimal Metabolic Health and Longevity.

08/07/2026

Big news! 🎉📰 I’m featured in Seattle Magazine’s Health & Wellness issue, in Haley Shapley’s article “Hacking Your Body for Better Health.” 🧬✨

This piece dives into biohacking — how we can use data, technology, and personalized medicine to take control of our health instead of waiting for something to go wrong. It’s exactly the philosophy behind my practice: helping people optimize their cardiometabolic health, energy, hormones, and longevity through a functional medicine lens. 💪🔬

Biohacking isn’t about extremes or quick fixes — it’s about understanding your unique biology and making targeted, sustainable changes that actually move the needle. Whether that’s BHRT, metabolic health, or building daily habits that support long-term vitality, this is the work I love doing every day with my patients. 🩺💙

So grateful to Haley and Seattle Magazine for the opportunity to share this message with a wider audience. If you’ve ever wondered what biohacking really means (and how it could apply to you), this is a must-read. 📖👇

Pick it at any local news/magazine stand! 🔗

08/06/2026

Some days remind you exactly why you love what you do. 💙

Today I got to sit in on ARP Review Rounds, breaking down the biggest fight in history — Gaethje vs. Topuria at UFC Freedom 250 — with fellow ringside physicians. From hormone health to high-impact sports medicine, my job never stops surprising me.

Grateful doesn’t even begin to cover it.

With Love, Claudia

07/23/2026

The fatigue coffee doesn't fix. The drive that quietly disappeared. The gym that stopped working.
Not laziness. Not just aging. Biomarker-driven, and correctable.

07/16/2026

No hand-offs. No "the team."
You work directly with me. Every visit, every result, every protocol decision — it's me, not a rotating cast. That's what a solo, physician-led practice actually means.
Link in bio to book your discovery call.

07/14/2026

The lab your doctor probably didn't run. Normal bloodwork and feeling awful can both be true. Most panels stop at TSH and estrogen — yours should include SHBG, DHEA-S, and Free T3/Reverse T3 too. Here's what a fuller picture actually looks like. Ready for an actual answer? Link in bio to book a discovery call.

07/13/2026

Just back from Peptide World Congress 2026 — and one session is still running through my head.
Dr. Devaki Lindsey Berkson's talk, "Phenotype Before You Prescribe: The Evolution of Precision Peptide Therapy," made an argument I wish more of the field took seriously: generic symptom-matching protocols are a shortcut, not a strategy. Before you build a peptide framework, you have to actually understand a patient's biological terrain — their phenotype, not just their complaint list.
That's the same principle I apply to hormone therapy. A protocol built off a symptom checklist isn't personalized — it's a guess with better branding.
Dr. Berkson also spoke to something I see constantly in practice: hormones and peptides aren't competing tools, they're complementary ones. Sex-steroid hormones and cellular peptide therapies work better together — optimizing longevity and tissue healing in ways neither does alone.
Cellular medicine is moving fast. Grateful to learn from clinicians pushing it forward with this level of rigor.

07/09/2026

Your labs said "normal." Your body is saying something else.
Here's the gap nobody explains to you:
→ TSH: standard range 0.4–4.5, optimal range 1.0–2.0
→ Vitamin D: standard "sufficient" 30 ng/mL, optimal 50–80 ng/mL
→ Fasting glucose: standard normal

07/04/2026

Just returned from the Navigating Hormone Complexities medical conference, where a key study came up that I reference often with patients: a pooled analysis of 18 prospective studies covering nearly 4,000 men with prostate cancer and over 6,000 controls found no association between prostate cancer risk and serum testosterone, free testosterone, DHT, or several other endogenous hormones (Roddam et al., J Natl Cancer Inst, 2008).
If you've been told to avoid BHRT because "testosterone causes cancer," that guidance is built on outdated assumptions — not on what the largest pooled analysis of the data actually shows. The conversation deserves an update, one that starts with your labs (PSA, free/total T, SHBG), not a blanket rule from decades ago.
This is why I practice the way I do: MD/ND-trained, Rouzier-protocol BHRT, decisions made from your numbers. 📊
💬 Questions about your own hormone picture? DM me or book a consult — link in bio.
🧬

06/26/2026

📍Conference mode: ON ⚡️

Today I’m deep in “Navigating Hormone Complexities” — covering cancer, PCOS, and endocrine disrupting chemicals and their impact on hormone health. 🧬

Big ones from today’s sessions: per the data presented, estradiol-only therapy showed no association with breast cancer, and estradiol combined with progesterone was associated with a reduced risk compared to estrogen alone. This is the kind of data that matters when we’re talking through BHRT options together. 📊

Here’s the thing — as physicians, we have to dig into the actual studies, not just headlines, and help our patients cut through misinformation that’s sometimes driven more by politics and economics than by science. 🔍

This is why I show up to conferences like this again and again — staying current isn’t optional in medicine, it’s a responsibility I take seriously for every one of my patients.

I genuinely love what I do! 🙌

With Love, Claudia

06/25/2026

“Will hormones give me a blood clot?” 🩸

I get asked this almost every single consult. Here’s the honest answer: it’s not “hormones” doing it — it’s which estrogen. 🧬

The WHI study that started this whole fear used conjugated equine estrogen (Premarin) ⚠️ — not bioidentical estradiol. Different molecule, different effect on the body. Studies on bioidentical estradiol — including the French E3N and ESTHER cohorts — show a meaningfully different clot risk profile than the synthetic version that scared everyone in 2002. ✅

And testosterone? 💪 Different physiology altogether. It doesn’t carry that same risk profile at all.

This is exactly the kind of nuance that gets lost when “BHRT” gets lumped into one scary category. The molecule matters. The monitoring matters. 📊

I broke down the 6 safety questions I hear most in consults — clots, cancer risk, FDA approval, dosing, and more — on the blog now. Link in bio. 🔗

Address

Kirkland, WA

Telephone

+14255532937

Website

http://www.brillianthealthinstitute.com/, https://linkin.bio/drclaudiaarregoytia

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