The Natural Approach To Healing
Signature Services & Products
At Dr. Brenda Marshall’s practice, we blend cutting-edge diagnostics with a holistic, integrative approach to help you feel energized, balanced, and at ease in your body. With specialties spanning hormone optimization, gut health, metabolic support, and inflammation reduction, each treatment plan is designed to address the root cause—not just symptoms. Whether you're navigating menopause, dealing with stubborn weight, or recovering from chronic stress, we offer personalized solutions grounded in both science and nature.
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Prospective Client Discovery Call - Free 15 minutes with Dr. Marshall
Prospective Client Discovery Call - Free 15 minutes with Dr. Marshall
Maybe you have already seen a dozen providers and have made limited progress? Or perhaps the 12 minute primary care MD visits have been unfruitful?
Dr. Marshall is here to listen, find the core issues and design a plan for you. Let's talk!
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Best Deal Jumpstart Package
Best Deal Jumpstart Package
Begin a total health transformation and restoration! At your initial in person or remote visit, Dr. Marshall will connect with your health history in depth, getting to your core issues of what is plaguing your health and hearing your concerns. She will then gather valuable lab data based on your history, to hone in on the dietary, supplements and perhaps prescriptions needed to address your symptoms and help in the prevention of future disease. This package includes an initial consultation with a written plan of action custom for you, deep dive wellness bloodwork kit with review, and 3 follow-up 30 minute remote follow-up appointments to monitor your progress and make adjustments to your protocol.
Dr. Marshall will guide you through your wellness journey ensuring support and success while limiting unneeded testing or complicated protocols.
Deep Dive Wellness Blood Analysis
Deep Dive Wellness Blood Analysis
Your primary care doctor offers usually the basics that typically have limited findings. We prefer to look deeper to investigate potential smoldering issues and address these findings before they begin to wreak havoc on your health & wellness.
These labs also may give indicators of disease risks that are genetically based and modifiable thru diet, exercise or prescription therapy. Once your labs have been received we will make basic recommendations thru Fullscripts and let you know if you need a formal consult for medical prescription treatment or further testing.
Rid of IBS, migraine, insomnia, cholesterol, poor health, weight, fatigue.
30+ years experienced MD
Discover your wellness & vitality!
Medical Weight Loss
Medical Weight Loss
Unravel underlying causes & treat holistically plus semaglutide, tirzepatide, HCG & phentermine. First a holistic approach using history and blood work to correctly evaluate the root cause of weight issues - then weight loss is accomplished thru medical therapies and proper diet and exercise - with your goal to never regain the weight lost!
Schedule today and see the difference.
Bio-Identical HRT for Women and Men
Bio-Identical HRT for Women and Men
A key factor to many of the disease processes which result in symptoms and illness are the result of hormonal imbalance. Hormones, along w/neurotransmitters and nutrition, play a key role in health restoration. Most imbalances can be detected easily by a thorough history, physical exam and diagnostic labs.Many problems ranging from weight control, depression, fatigue, poor sleep, migraine, PMS, irregular cycles, low libido, and other issues can have the underlying cause of hormone and neurotransmitter imbalance.A majority of these problems can be solved using daily hormone replacement via medications made in a compound pharmacy, or amino acids specifically targeted for particular chemical deficiencies. Nutritional supplements can also help the body to regulate/ process and restore hormones and neurotransmitters.Bio-identical hormones are identical to those found in your own body and are replaced to achieve levels which are in the normal physiologic range. Everyone has unique needs, and what may work for one person may not necessarily be the right choice for another.Bio-identical hormones promote vitality, relieve many symptoms, and can provide long-term prevention of chronic degenerative disease.
Premier Supplements
Premier Supplements
Fullscript provides the highest quality and reliability of supplements brands available, and provides proper storage prior shipping and excellent customer service.
High quality facial, skin, dental and even pet vitamin products can be found in addition to their HSA card compatibility.
Fatty 15
Fatty 15
Dr. Marshall’s patients frequently share their experiences in live video testimonials. These stories reflect the transformative power of integrative care—from resolving chronic symptoms and balancing hormones to feeling energized, sleeping better, and regaining joy. These authentic voices offer a glimpse into how natural therapies and individualized support can change lives.
Anti-aging Peptides
Anti-aging Peptides
Peptides and Natural Science.
Peptides are tiny chains of amino acids — the building blocks for our bodies to make protein — and therefore are powerhouses in promoting health and wellness.
Benefits can include improved tissue repair, gut health, immune function, recovery, and even reduce likelihood of getting alzheimer’s disease. Peptides have also been found to enhance skin rejuvenation, muscle growth, and hormonal balance.
You can purchase pharmaceutical grade peptides for brain, heart, joint health and inflammation reduction on the below link.
Reduce Inflammation
Reduce Inflammation
Mitopure®, the nutrient that can re‑energize cells
As we age, our cells age. Mitopure® is the first postbiotic nutrient shown to trigger a crucial recycling process within our cells called mitophagy, targeting age-related cellular decline. Mitochondria are our cellular powerhouses. The trillions of cells that comprise our body tissues run on the energy created by them.Our mitochondria are constantly renewed to produce energy and fulfill the vast energy demands of muscle, skin and other tissues. As we get older, mitochondrial renewal declines and dysfunctional mitochondria accumulate in the cells, resulting in significant issues.
Insufficient energy supplyProduction of harmful moleculesReduced cellular health
Meet Urolithin A, a rare molecule that renews our cellular powerhousesOur scientists unlocked the power of Urolithin A, a molecule that stimulates this crucial recycling and cleansing process - ultimately protecting cells from age-associated decline.
Food & Genetics
Food & Genetics
Using genetic testing and nutrient analysis - we can guide food choices best for you!
Low inflammatory, Gluten/Dairy Free/ Low Histamines/ Low lectins... Dr. Marshall has you covered and will help solve ongoing gut issues, SIBO & food sensitivities.
Food sensitivity evaluation and genetics with mygenefood.com and ALCAT, SIBO and GI MAP testing.
Food is essential to health and well-being.
We will help you redefine your relationship with food.
Smartguard Anti-snore Device
Smartguard Anti-snore Device
Extremely Comfortable
Our device molds to the unique arch shape of your mouth, allowing for superior comfort - meaning you’ll have no problem wearing this every night, eliminating snoring for good.
Highly Effective
Our device holds your lower jaw slightly forward allowing for an open airway and reduces snoring in 96% of users.
Medical Grade Materials
SmartGuard® Anti-Snore Device is manufactured with lab quality materials and meets all FDA biocompatibility testing requirements.
Joy Organics Premium CBD
Joy Organics Premium CBD
Looking for clean, reliable CBD?
Joy Organics is the #1 USDA-certified organic CBD brand, offering top-quality formulas that are third-party tested and made with your well-being in mind. Whether you’re looking to sleep better, reduce inflammation, or just feel more balanced—Joy Organics has something for you.
🌿 Family owned. Lab tested. Backed by over 3.5 million units sold.
👉 Use my link below to explore their full CBD and THC product line.
Power Plate® for Bone Strength, Balance & Circulation
Power Plate® for Bone Strength, Balance & Circulation
Support Stronger Bones, Muscles & Balance – At Home
Power Plate® uses precision vibration technology to activate more muscles, improve circulation, and support bone health—making it an excellent addition to wellness routines, especially for those managing osteopenia, osteoporosis, or age-related muscle loss.
It’s FDA-registered, backed by 20+ years of clinical research, and trusted by doctors, rehab centers, and athletes worldwide.
🔸 Used by Serena Williams, Morgan Freeman, and leading physicians
🔸 Clinically shown to increase bone density and improve mobility
🔸 Gentle enough for beginners, powerful enough for athletes
NAD+ Injections
NAD+ Injections
NAD+ (nicotinamide adenine dinucleotide) is a vital molecule that powers essential cellular functions. As we age or face metabolic stress, NAD+ levels drop—impacting energy, cognition, metabolism, and more. NAD+ injections, delivered intravenously or intramuscularly, can rapidly restore levels to support key health goals like improved physical performance, sharper focus, and better metabolic function. Clinical reports also suggest benefits for skin, mood, cholesterol, and insulin sensitivity. Unlike oral supplements, NAD+ injections offer immediate, high-absorption delivery—ideal for those managing fatigue, aging, or seeking a deeper cellular reset.
B-12 Shots
B-12 Shots
The Super Shot, also known as the "S" Shot is a combination of B-Complex and activated Vitamin B-12 plus selected amino acids to support the liver for metabolizing fat, giving energy, and helping detoxify the body. The body stores fat in response to a lack of efficiency in detoxifying—often storing fat-soluble toxins in your body fat to rid these substances from floating through your bloodstream. The greater the toxin load on the body, the more fat your body will store.Eating a clean healthy diet and pure water is imperative for minimizing your toxin load and optimizing health, alongside a good detoxification program. Hence, the "S" Shot was created—not solely for detoxification, but also for brain function and mood support.B Vitamins are essential for producing brain chemicals like serotonin, GABA, and dopamine. These support enjoyment, sleep, and relaxation. Better brain chemistry means better cortisol regulation—the stress hormone linked to weight gain.The “S” Shot is especially useful for those with absorption issues, food allergies, vegan diets, or genetic mutations that hinder B-12 metabolism. It bypasses these barriers with injection delivery, but should still be used under physician guidance.While many lose weight with this injection, it’s not a stand-alone weight loss plan. Hormone or thyroid assessment may be needed. The “S” Shot can be taken weekly, bi-weekly, or twice weekly depending on response.
Verified Google Reviews From Real Patients
Dr Marshall changed my life! I was feeling old and tired and had gained weight. After a few months I am feeling the way I used to when I was younger. I’ve lost weight, have tons of energy, and love my life again!!
Dr. Marshall has restored my quality of life. If you are struggling with a health challenge I strongly suggest Dr. Marshall. When I went for bloodwork the lab technician was familiar with Dr. Marshall. He shared that she runs the most unique labs he has ever seen.
A friend who had a great experience with Dr. Marshall gave me a referral, and it has been the best experience! I’ve been searching for a good doctor for years. I struggled with weight and sleep and Dr. Marshall did testing beyond the usual scope of adult medicine, and discovered some important health issues in my liver, vitamin absorption and hormones.
Excellent doctor, very dedicated, friendly, nice, and respectful. Really recommend her 10/10!!
Two and a half months ago, I had my first appointment with Dr Marshal. I was feeling horrible. With my meds and all the high quality vitamins and shots, I am feeling so much better. I am not 100% yet but I know I will be soon. This amazing lady knows what she's doing. She is changing my life.
Both my wife and I have been going to Dr. Marshall for several years now. Thank you for all your excellent, considerate care over the years Doctor, much appreciated.
I started receiving Vitamin B12 shots from Dr. Marshall and I have to tell you the shots have helped me to be far more productive than I was before receiving them. The shot is quick and easy and affordable. I would highly recommend getting the shot weekly if you are feeling lethargic and can’t seem to get much done.
As a middle-aged man, I struggled with hormones and weight. I also have also had chronic migraines for over 30 years. Dr Marshall did testing on me beyond the usual scope of even experienced Neurologists. She came up with a plan of nutrition, supplements, and necessary medications. She was firm but positive about me following through with my part of the plan.
Outstanding Physican that listens and focuses on the whole patient and their symptoms and needs. Her functional medicine approach zooms into to the underlying issues and solves them. Recommend highly
Dr Marshall is an expert treating hormone imbalances, complex gut issues & insomnia. She takes care of you.
Dr. Marshall was recommended to me by a friend who went to her for hormone replacement therapy. I am so glad that I made that first appointment and followed her treatment advice. I always felt good, didn't realize that as I aged I wasn't at my peak, as the changes in my body happened over time. Once I was on the supplements and hormones that my body needed I felt like a new women.
It was great to finally get a handle on all my "non-specific" symptoms. Dr. Marshall systematically identified the reasons for my feeling tired, anxious and chronic stomach problems. After following her advice, I feel the best I have in years.
I’m very hesitant to recommend people unless I’m completely certain my friends/family will have a good experience. With that said, my highest recommendation goes to Brenda! My experience with her has been beyond amazing. She’s extremely intelligent and found out exactly what I was looking for in a short period of time.
I’ve been seeing Dr. Marshall regularly for the last 6 years and she has changed me! I have more energy, feel more balanced, sleep better and I lost weight. Very thankful I found her when I did.
So thankful for Dr. Marshall's care. Her knowledge is priceless. She uncovered deficiencies that I didn't know existed. She has helped me get my life back after 10+ years of my Primary Dr. saying my test results were normal.
Brenda is amazing! Her practice bridges the gap between modern medicine and holistic health, a divide that has left many people suffering. It's more than just a band-aid; it's transformation and transcendence. She's both intelligent and down to earth, while being very positive, and it's clear that she truly, truly cares about your healing.
I was referred to Dr. Marshall from a friend who had just started seeing her. My first visit, I went to her office. She had me fill out a very detailed questionnaire about my health and the problems I was having before I came in. And then we probably talked for an hour about my concerns and the things that I was experiencing.
Dr. Marshall is very knowledgeable! Love her!!
This is a RePost. All sentiment remains the same as Dr Marshall is a vital part of my life for the past 13 years. So much so, I travel from out of state, at my expense from Hawaii, to seek her advice and expertise.
Dr. Marshall helped me with my diet and performance goals. The office is professional and personal well balanced. BTW getting a shot is very fast and easy. I appreciate your service. Thank you
When I started with her I was very sick with IBS. I had severe anxiety and insomnia to name a few of the multitude of issues I was dealing with. she combined her medical treatments with alternative treatments. She looked way outside the box of Conventional medicine and got me well again.
I was referred to Dr. Marshall by my daughter who had amazing results just after 2 weeks. I went and saw her and had an extensive visit at her office. She knew just the right vitamins and supplements I needed. After 1and a half weeks I felt like my old self! No more dizziness, I can think clearly now, and have good stamina as I am a runner. She knows her stuff! Thank you Dr. Marshall
Dr. Marshall is incredible, she’s super smart, attentive, and caring. Being an MD gives her patients a comfort level with all her treatments.
I had a great experience with Dr. Marshall! She's helping me understanding the roots of my sleeping problems. She's extremely knowledgeable and listens to all the concerns I have.
I’ve was unable to get pregnant and have had multiple miscarriages during the past 2 years. With Dr. Marshall’s help I’ve been on supplements and progesterone cream and we’re now happy and healthy in our 2nd trimester! Thank you Dr. Marshall for all your support and for helping our dreams of a family be realized. 🥰
Brenda is an amazing doctor. She is super careful and caring. You have to do your homework to get something out of it. But it’s worth it. I have been sleeping better since I went to her. I highly recommend her.
After several years of trying to figure out why I felt so bad, a friend recommended Dr. Marshall and I can't believe how quickly she was able to identify and treat my issues! I have more energy, less joint pain, less anxiety and my body no longer feels like it's wading through mud!
AMAZING DOCTOR! Very dedicated to finding the underlying roots of all health problems. Extremely knowledgeable and caring. 10/10 would recommend!
I believe Brenda perfectly described my gut issue before I have even got labs done. And the little adjustments have already made an impact on my symptoms. Highly recommended for any gut issues!
Dr Marshall changed my life! I was feeling old and tired and had gained weight. After a few months I am feeling the way I used to when I was younger. I’ve lost weight, have tons of energy, and love my life again!!
Dr. Marshall has restored my quality of life. If you are struggling with a health challenge I strongly suggest Dr. Marshall. When I went for bloodwork the lab technician was familiar with Dr. Marshall. He shared that she runs the most unique labs he has ever seen.
A friend who had a great experience with Dr. Marshall gave me a referral, and it has been the best experience! I’ve been searching for a good doctor for years. I struggled with weight and sleep and Dr. Marshall did testing beyond the usual scope of adult medicine, and discovered some important health issues in my liver, vitamin absorption and hormones.
Excellent doctor, very dedicated, friendly, nice, and respectful. Really recommend her 10/10!!
Two and a half months ago, I had my first appointment with Dr Marshal. I was feeling horrible. With my meds and all the high quality vitamins and shots, I am feeling so much better. I am not 100% yet but I know I will be soon. This amazing lady knows what she's doing. She is changing my life.
Both my wife and I have been going to Dr. Marshall for several years now. Thank you for all your excellent, considerate care over the years Doctor, much appreciated.
I started receiving Vitamin B12 shots from Dr. Marshall and I have to tell you the shots have helped me to be far more productive than I was before receiving them. The shot is quick and easy and affordable. I would highly recommend getting the shot weekly if you are feeling lethargic and can’t seem to get much done.
As a middle-aged man, I struggled with hormones and weight. I also have also had chronic migraines for over 30 years. Dr Marshall did testing on me beyond the usual scope of even experienced Neurologists. She came up with a plan of nutrition, supplements, and necessary medications. She was firm but positive about me following through with my part of the plan.
Outstanding Physican that listens and focuses on the whole patient and their symptoms and needs. Her functional medicine approach zooms into to the underlying issues and solves them. Recommend highly
Dr Marshall is an expert treating hormone imbalances, complex gut issues & insomnia. She takes care of you.
Dr. Marshall was recommended to me by a friend who went to her for hormone replacement therapy. I am so glad that I made that first appointment and followed her treatment advice. I always felt good, didn't realize that as I aged I wasn't at my peak, as the changes in my body happened over time. Once I was on the supplements and hormones that my body needed I felt like a new women.
It was great to finally get a handle on all my "non-specific" symptoms. Dr. Marshall systematically identified the reasons for my feeling tired, anxious and chronic stomach problems. After following her advice, I feel the best I have in years.
I’m very hesitant to recommend people unless I’m completely certain my friends/family will have a good experience. With that said, my highest recommendation goes to Brenda! My experience with her has been beyond amazing. She’s extremely intelligent and found out exactly what I was looking for in a short period of time.
I’ve been seeing Dr. Marshall regularly for the last 6 years and she has changed me! I have more energy, feel more balanced, sleep better and I lost weight. Very thankful I found her when I did.
So thankful for Dr. Marshall's care. Her knowledge is priceless. She uncovered deficiencies that I didn't know existed. She has helped me get my life back after 10+ years of my Primary Dr. saying my test results were normal.
Brenda is amazing! Her practice bridges the gap between modern medicine and holistic health, a divide that has left many people suffering. It's more than just a band-aid; it's transformation and transcendence. She's both intelligent and down to earth, while being very positive, and it's clear that she truly, truly cares about your healing.
I was referred to Dr. Marshall from a friend who had just started seeing her. My first visit, I went to her office. She had me fill out a very detailed questionnaire about my health and the problems I was having before I came in. And then we probably talked for an hour about my concerns and the things that I was experiencing.
Dr. Marshall is very knowledgeable! Love her!!
This is a RePost. All sentiment remains the same as Dr Marshall is a vital part of my life for the past 13 years. So much so, I travel from out of state, at my expense from Hawaii, to seek her advice and expertise.
Dr. Marshall helped me with my diet and performance goals. The office is professional and personal well balanced. BTW getting a shot is very fast and easy. I appreciate your service. Thank you
When I started with her I was very sick with IBS. I had severe anxiety and insomnia to name a few of the multitude of issues I was dealing with. she combined her medical treatments with alternative treatments. She looked way outside the box of Conventional medicine and got me well again.
I was referred to Dr. Marshall by my daughter who had amazing results just after 2 weeks. I went and saw her and had an extensive visit at her office. She knew just the right vitamins and supplements I needed. After 1and a half weeks I felt like my old self! No more dizziness, I can think clearly now, and have good stamina as I am a runner. She knows her stuff! Thank you Dr. Marshall
Dr. Marshall is incredible, she’s super smart, attentive, and caring. Being an MD gives her patients a comfort level with all her treatments.
I had a great experience with Dr. Marshall! She's helping me understanding the roots of my sleeping problems. She's extremely knowledgeable and listens to all the concerns I have.
I’ve was unable to get pregnant and have had multiple miscarriages during the past 2 years. With Dr. Marshall’s help I’ve been on supplements and progesterone cream and we’re now happy and healthy in our 2nd trimester! Thank you Dr. Marshall for all your support and for helping our dreams of a family be realized. 🥰
Brenda is an amazing doctor. She is super careful and caring. You have to do your homework to get something out of it. But it’s worth it. I have been sleeping better since I went to her. I highly recommend her.
After several years of trying to figure out why I felt so bad, a friend recommended Dr. Marshall and I can't believe how quickly she was able to identify and treat my issues! I have more energy, less joint pain, less anxiety and my body no longer feels like it's wading through mud!
AMAZING DOCTOR! Very dedicated to finding the underlying roots of all health problems. Extremely knowledgeable and caring. 10/10 would recommend!
I believe Brenda perfectly described my gut issue before I have even got labs done. And the little adjustments have already made an impact on my symptoms. Highly recommended for any gut issues!
Conditions Dr. Marshall Helps You Overcome
With over 30 years of experience in integrative and functional medicine, Dr. Brenda Marshall offers highly personalized care for the real conditions her patients face—from hormone imbalances and digestive distress to fatigue, anxiety, and environmental toxicity. Her science-based protocols are designed to uncover and treat the root cause—not just the symptoms—so you can reclaim your energy, balance, and long-term wellness.
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Meet Dr. Brenda Marshall
San Diego Physician with 30 years service &
Voted "San Diego's BEST Integrative Wellness" Ranch & Coast Magazine
Brenda Marshall MD, originally certified in Family Medicine from UCSD & Urgent Care Medicine is a dedicated practitioner of Integrative Medicine for you. She has specialized in the area of Integrative Medicine since 2007. She loves empowering you as a patient to understand your body and discover the gentle power and benefits of natural therapies. As an Integrative Practitioner, Dr. Marshall enjoy's being able to bridge the gap between western medicine and the “alternatives,” while providing a safe and nurturing atmosphere in which to heal.
Ready to Take the Next Step in Your Wellness Journey?
Dr. Marshall offers personalized, remote consultations for California residents—designed to uncover root causes and guide you toward lasting healing. Secure your spot today and begin your path to better health.
Book Your FREE 15-Minute Discovery Call
Have questions before getting started? Dr. Marshall offers a complimentary 15-minute call to learn more about your needs and see if her care approach is the right fit for you.