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Isaac Diaz, RD

4.5
(36)
Video calls
In-person
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Background

Are you struggling with your nutrition, weight loss, or fitness goals? You’re not alone — and I’m here to help!

Hi, I’m Isaac, a Licensed Dietitian Nutritionist, Certified Personal Trainer, and Certified Health Education Specialist with years of experience helping clients achieve their health and fitness goals.

As a big-time foodie (yes, including sweets!) and fitness enthusiast, I understand the importance of balancing enjoyment with a healthy lifestyle. I also specialize in food psychology, helping clients build a positive relationship with food while making sustainable, long-term changes.

With my guidance, you’ll receive a personalized nutrition assessment, evidence-based recommendations, and ongoing support—all delivered with professionalism and care.

Let’s work together to unlock your potential and achieve the lasting results you’ve been striving for!

Availability

Approach

"Struggling with your nutrition, weight or fitness goals? You’re not alone — and I’m here to change that. I’m Isaac, a Licensed Dietitian Nutritionist, Certified Personal Trainer, and Certified Health Education Specialist. I blend science-based nutrition, fitness, and mindset coaching to create lasting results. Let’s turn your effort into real, sustainable progress — and unlock a stronger, healthier, more confident you!"

Specialties

Weight Loss
Diabetes
High Cholesterol
High Blood Pressure
Eating Disorders & Disordered Eating
Food Allergies & Sensitivities
Vegan & Vegetarian
Pregnancy & Postpartum
PCOS
Autoimmune
IBS
Kidney Disease
Pediatrics
Colitis
Crohn's Disease
Celiac
IBD
GERD
Sports Nutrition
Bariatric
Transplant
POTS
Cancer / Oncology
Thyroid Health
Gut Health
SIBO
Perimenopause & Menopause
General Nutrition

Modalities

🥦
Meal Planning
🍴
Intuitive Eating
📊
Accountability
💬
Motivational Interviewing
🔎
FODMAP
🚫
Elimination Diet
💞
Relationship With Food
🧘
Mind-Body Connection
💤
Sleep
🏃
Exercise
🔬
Lab Testing
⚙️
Functional
🔗
Integrative
🌿
Holistic
💊
Supplement Management
❤️
Health At Every Size (HAES)
📏
Personalized Macros
🧠
Cognitive Behavioral Therapy (CBT)
Weight Loss Medication
🥗
Plant-Based

Insurance accepted

Aetna, Anthem, Blue Cross Blue Shield, Blue Care Network, Blue Cross, Blue Shield, Carefirst, Cigna, Empire, Golden Rule, Highmark, Horizon, Independence Blue Cross, Kaiser, Regence Blue Cross Blue Shield, Oxford, Select Health, United Healthcare, United Medical Resources (UMR)

Seeing clients in

AK, AZ, CA, CO, CT, HI, ID, IL, IN, MA, MI, NH, NJ, NY, OK, OR, PA, TX, UT, VT, VA, WA, WV, WI, WY

Location

6929 Valatta Pl, Rancho Cucamonga, CA 91701
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Reviews
4.5
36 Reviews
(36)
5
(273)
4
(27)
3
(27)
2
(27)
1
(4)
AI summary of written reviews

Clients consistently describe Jane as warm, knowledgeable, and easy to talk to. Many highlight noticeable improvements in their eating habits, energy, and confidence after just a few weeks of working with her.

While a handful of clients hoped for more structured follow‑up, the vast majority praise her for setting realistic goals and explaining nutrition in a way that finally “clicks.”

Overall, Jane is highly recommended for anyone looking for thoughtful, supportive guidance.

6 clients left publicly written reviews
2 days ago

Jane completely changed how I think about food. She’s patient, knowledgeable, and explains things in a way that actually makes sense.

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