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Castellano Health Institute
(714) 530-2183
TRT & Men's Health Transformations
Orange County · Since 1999

“Thank you Doctor Castellano!”

Hearing success stories from our patients doesn’t just tell us we are on the right track. It confirms that we are actively transforming lives and families. And that’s why we’re here. For you!

Call to Schedule

Individual results vary. Each story is one person’s experience, not a promise of any outcome.

J.G. · Anaheim

This is what a disabled athlete with a spinal cord injury looks like under his care.

Patient J.G. of Anaheim — earlier recovery progression after muscle-wasting atrophy
Before
Patient J.G. of Anaheim today, after regaining muscle mass
Today
“Doctor Castellano uses cutting edge medicine and personalized care to transform lives. This is what a disabled athlete with a spinal cord injury looks like under his care. He increased my mobility and decreased the severity of my daily symptoms. He even helped me regain 30lbs of the 65lbs of muscle I lost to muscle wasting atrophy. Thank you Doctor Castellano!”
— J.G., Anaheim

Individual results vary. This reflects one patient's personal experience — it is not typical, not medical advice, and not a guarantee of any outcome.

Dustin · Garden Grove

From overweight, tired, and run down to the best shape of my life.

Dustin, a TRT patient of Dr. Castellano, before.
Before
Dustin, a TRT patient of Dr. Castellano, after.
After

“Before Dr. Castellano, I was at one of those national chain TRT clinics. Cookie-cutter protocols, no real doctors on staff, and when my questions got specific — they fell flat.

Looked elsewhere and I’ve been with Doc for about 8 months now. The difference is night and day. My bloodwork has improved, but what matters more is that I actually understand my protocol — what it is, why it works, and how it fits my goals. That’s credit to Doc. He’s accessible, personable, and genuinely knowledgeable — Doc has given me expert guidance and realistic expectations, not just a blanket protocol and a refill.

Mid-40s, active husband, dad, professional — down 30 pounds over the past year, best shape of my life, and I feel like myself again. Highly recommend.”

Dustin, mid-40s, husband and dad. Works with our web team.

Individual results vary. This reflects one patient's personal experience — it is not typical, not medical advice, and not a guarantee of any outcome.

Low testosterone and TRT

Five-star Google review · 2020

“This man brought life back into my life. I had my blood work and found testosterone levels at an incredibly low point, which explained the various health issues I was experiencing. Dr. Castellano explained for me the reasoning behind what I was experiencing as well as showed me a clear route of action to get my life back on track. Can't thank the man enough. If you are experiencing signs of low testosterone, do yourself a favor.. stop second guessing yourself and go see the good Dr. Your health and overall quality of life will thank you for it!”

Ilya
See it on Google — Ilya’s review
Five-star Google review · 2020

“Came here for hormonal therapy. Even though I’m dieting I wasn’t hitting my mark. Found out I was low on testosterone. After labs he helped me and I feel and look way better! Check this place out if you want to change your life!”

Victor Torres
See it on Google — Victor Torres’s review
Five-star Google review · 2026

“I’ve been coming here for a couple years now and have been loving the results. I like how Dr Castellano and Jenn stay on top of results with blood tests to make sure necessary adjustments need to be made. Highly recommend going in for a consultation.”

Wess
See it on Google — Wess’s review
Five-star Google review · 2025

“I have been going to Dr. Castellano for over a year now to keep up with my overall health. He has been tremendous is helping me get myself on the right track to where I needed to be. He is very great at explaining all details on my bloodwork and takes time to make sure I understand it. If I ever have any concerns or questions he is very honest and upfront so that I can make the best decisions for myself. Thank you Dr. Castellano and thank you Jen for all you do!”

Tiger
See it on Google — Tiger’s review
Call to Schedule · (714) 530-2183

A first visit is an hour with Dr. Castellano and a real look at your bloodwork.

Low testosterone treatment and TRT with Dr. Castellano →

How long TRT takes to work →

Patient · Long Beach

Three words: love, love, love.

Long Beach weight-loss patient before her care with Dr. Castellano — face blurred at the patient's request
Before
The same Long Beach patient after her weight-loss and wellness plan with Dr. Castellano — face blurred at the patient's request
After
“Love! Love! Love! Professional. Solution-driven. Results! If you are looking for weight loss or overall health and wellness…this is it!”
— Patient, Long Beach

Individual results vary. This reflects one patient's personal experience — it is not typical, not medical advice, and not a guarantee of any outcome.

Weight loss

Five-star Google review · 2020

“For years i have struggled with my weight. I visited multiple Doctors, dietitians and health care professionals with marginal to no success. A family member recommended Dr Castellano and WOW he knew right from speaking to me and learning my habits and lifestyle what was wrong. The blood work just validated his assumptions. I started his program on March 3rd 2020 and as of today (about 4 and a half months) I am down 58 pounds and not only that my energy level is thru the roof and I feel great. I went from being clinically obese to slightly overweight and still working on just being normal and healthy. I cannot recommend this clinic and staff enough. Every visit and phone consultation Dr Castellano listens to all your concerns and questions and addresses one by one until you have every single answer. Do not hesitate GO VISIT THE CLINIC. I fly from Dallas Tx to SoCal to see him. Yes it is that worth it!”

Armando Raynal
See it on Google — Armando Raynal’s review
Five-star Google review · 2017

“Dr. Castellano will tell it like it is and help you meet your goals. With his help, my life is changed. I've lost over 20% of my body weight - it wasn't easy but he helped me through the hard times. For men's health, I don't think i could have found a more knowledgeable or more competent doctor. Thanks for everything. I highly recommend him.”

Mike Attaway
See it on Google — Mike Attaway’s review
Five-star Google review · 2021

“Dr. Castellano and Jen were extremely helpful and patient in answering all of my questions in regards to my health concerns and weight loss concerns. Dr. Castellano has a different perspective compared to your 'regular' family doctor. He gets straight to the point and tries to find the root cause of the issues. My normal doctor only sees me for 15 minutes but Dr. Castellano spent as much time necessary to help me understand my bloodwork and my own body chemistry. He presented the information in digestible terms and helped me to find practical solutions to my questions. If you want to get the most out of your consultation, come with questions and take lots of notes. I took copious notes and look forward to keeping Dr. Castellano updated on my progress.”

Ed Chan
See it on Google — Ed Chan’s review
Call to Schedule · (714) 530-2183

The office can tell you what a first weight-loss visit covers.

Dr. Castellano’s approach to weight loss →

PRP for hair

Real hairlines. Before and after.

  • PRP hair-loss before and after — top-down view of a male patient's scalp, labeled before and after.
  • PRP hair-loss before and after — side profile showing hairline change, labeled one year ago and today.

Individual results vary. Photos show real results with treatment consent on file.

How PRP for hair works at this practice →

A doctor who takes the time

Five-star Google review · 2026

“I’m so glad to have found Dr. Castellano. My experience was fantastic. The consultation gave me plenty of time to discuss all of my concerns, and he asked thorough questions that made me feel genuinely seen and heard. I appreciated that he actually took the time to get to know me.

After struggling for quite some time without clear answers to my issues, Dr. Castellano’s insight, along with the bloodwork he ordered, finally helped identify what may have been contributing to my symptoms. I left with greater clarity, a path forward, and a renewed sense of hope.

I’m incredibly grateful to Dr. Castellano for taking my concerns seriously and helping me find answers and solutions.”

Jonathan Villarreal
See it on Google — Jonathan Villarreal’s review
Five-star Google review · 2026

“I'm really appreciative that a good friend of mine gave me Dr. Castellano's contact information from the very first day I met him and his assistant it's been a blessing for my health and body transformation, I highly recommend any one that needs a very knowledgeable Dr. to improve your health and way of living

He takes the time to listen and observe your every needs. He's not like other doctors who give you ten minutes of there time and then your out the door. He will listen as long as needed and put a great plan for your health in what ever it may be, Thank you Dr. Castellano

Also Jennifer for being great people”

DeSimone Deli & Bakery
See it on Google — DeSimone Deli & Bakery’s review
Five-star Google review · 2022

“Dr. Castellano and Jen are truly the best to work with. Dr. is very easy to talk to and you can see how much knowledge and expertise he possesses. I’ve worked with other Dr.’s and was left with many questions. Dr. Castellano answered every question and concern. And explained so much to me that made total sense. I’m excited to be a new patient and look forward to working with his practice for a long while.”

Jered Madrid
See it on Google — Jered Madrid’s review
Five-star Google review · 2022

“Thank God I was able to find Dr. Castellanos. I gave him a call after reading all his positive reviews. Straight from the second I called he was extremely caring. I had a lot of questions and he was able to clear up his schedule and see me that same day. I greatly appreciate all of his knowledge and sincerity. If you’re looking for a Doctor who truly cares about you and your health then you’ve come to the right person. Thank you Dr. Castellanos!”

Anthony Marroquin
See it on Google — Anthony Marroquin’s review
Five-star Google review · 2024

“Dr Castellano was a pleasure to see and work with. He truly cared about my health and future well being. If you want to see a Dr that cares and doesn’t just see you as a dollar sign I would definitely recommend coming here!”

Johnny Imperial
See it on Google — Johnny Imperial’s review
Call to Schedule · (714) 530-2183

The office answers the phone Mon–Fri 9 AM – 5 PM.

Rated 5.0 on Google across 35 patient reviews.

Individual results vary. Each story and review on this page is one person’s own experience — it is not typical, not medical advice, and not a guarantee of any outcome.

Ready when you are

One conversation tells you whether this is the right fit.

Call the office to set up a 1-hour consult with Dr. Castellano. Bring whatever bloodwork you have on file — or fresh labs get ordered up front. Either way, you’ll leave with a real read on what’s going on.

Call (714) 530-2183

Calling after hours? Leave a message — we’ll get back to you the next business day.