I’m Tisha (no R), a Human Fuel Expert, Metabolic Health Practitioner (MHP), Functional Diagnostic Nutrition Practitioner (FDN-P), National Board-Certified Health & Wellness Coach (NBC-HWC), and Certified Nutrition Network Practitioner (NNP). 

But more important than the letters behind my name, I know what it’s like to do “all the right things” and still feel like your body is working against you.

If you’ve been told your weight gain, migraines, fatigue, perimenopause symptoms, or chronic conditions are “just part of getting older” — I’m here to tell you they’re not.

I learned that the hard way. At 8 years old, a PE coach told me to run more and eat less. That sent me into decades of chasing health the wrong way — starving, binging, endless workouts, diet shakes, and appetite suppressants — while the diagnoses stacked up: anemia, PCOS, migraines, adult acne, and more.

By 36, I was living in a cycle of symptoms, meds, and frustration — until a friend asked me, “Who’s going to care for your daughter when you’re gone?” 

That was the turning point.

I stopped chasing a number on the scale and started learning what really makes the body thrive — and what makes it break down. The truth? The food I’d been eating my whole life was never the right fuel for my body.

Now I help high-achieving adults with chronic conditions — like high blood pressure, diabetes, PCOS, perimenopause symptoms, and more — uncover which foods are failing their body so they can restore function, stop collecting diagnoses, and age without becoming a burden.

If you’ve been told your symptoms are normal, your family history is your fate, or that managing symptoms means you’re healthy — you’ve been lied to. My free guide, The 3 Lies Cutting Your Life Short, exposes these myths and shows you what’s really possible for your future health.
Get it here: https://tishacastillo.com/3lies

Hi, I'm Tam, a certified Insulin IQ Coach and Health Educator, dedicated to empowering busy moms and women of all ages to heal insulin resistance, reclaim vibrant energy, and spark generational wellness. 

I know the chaos of juggling family life while battling health struggles. I've walked that path  with all its twists and turns for far too long. 

My journey started at 20 years old with an autoimmune diagnosis, escalating at 27 after a 20-week miscarriage and Hashimoto's thyroiditis. Weight gain, gut issues, mood swings, and chronic fatigue became my daily reality. If someone had guided me to focus on insulin as the root cause, I could have avoided so much pain—physical and emotional, including a total of five miscarriages, four in the second trimester. It's a miracle I have the 5 living children I do. 

This mission of mine has only become more heartbreakingly personal: my oldest sister, only three years older, lost her battle at 47 years old, from colorectal cancer, a preventable disease tied to unchecked insulin resistance and lifestyle factors. Coming from a family line riddled with these issues, I've seen how poor metabolic health collapses worlds, stealing time, resources, and joy from connecting with those we love in healthy ways.

But here's the hope: I turned my pain into purpose and want to help you do the same. Through 14 years of health education, turning over all the "rocks" to find the root causes, I discovered insulin-centric strategies—simple ways to relearn eating, sleeping, fasting, and nervous system regulation—blended with nature-backed tools for physical support. These changes healed me from the inside out, restoring my energy, confidence, and ability to show up fully for my family. I practice what I preach and have lost over 20lbs in under 3 months using all these tools. 

You can know all the things, but if you don't DO them and hold yourself accountable through the ups and downs, you stay stuck in a place that doesn't serve your higher potential.

Now, as a Metabolic Mentor, I help women break free from the cycle of hopelessness, confusion, and shame that traditional health methods perpetuate.
 

Imagine feeling hopeful again, mastering your metabolism without overwhelming diets or guesswork. Through my programs and working closely with me, you'll learn doable routines that fit your packed schedule—kid-friendly meal hacks, quick stress resets, and personalized insulin-resistant plans—that build progress and discipline. 

No perfection required; just brave, consistent steps that let you reclaim control, release past pain, and embrace your divine brilliance. 

The ripple effect? Healthier kids who learn from your actions, breaking generational patterns and opening doors to abundant opportunities.

Women and mothers are society's change-makers—when you heal, your family thrives, and the world gets a little brighter. If you're tired of fatigue, fluctuating moods, or feeling like self-care isn't worth the effort, let's connect. 

Tell me your struggles and let me help you rebuild your belief in your body, and step into a future of confidence and vitality. 

Book a free discovery call today—together, we'll make small, simple habits that create big, lasting change.

(Let's heal the world, one woman at a time.)

Meet Sim – Chewing The Fat. Helping you to stop eating sh*t (most of the time!)

Sim is a qualified health practitioner with over 25 years of experience in holistic health, bodywork, and metabolic coaching. She holds a BSc (Hons) in Health Sciences: Therapeutic Bodywork and began her career with hands-on therapies including massage, reflexology, and structural bodywork. Her early work focused on helping clients relieve pain, reduce stress, and reconnect with their bodies.

After being diagnosed with fibromyalgia and experiencing her own burnout, Sim took a deep dive into nutritional science and metabolic health. She transformed her health through a low-carb, real food approach, which sparked a new direction in her professional work.

In 2017, Sim became a Health Coach for the NHS National Diabetes Prevention Programme, training with Xpert Health (Dr. Trudi Deakin). She has since qualified as a Nutrition Network Advisor (Professor Tim Noakes) and an InsulinIQ Certified Coach (Dr Ben Bikman & Co), specialising in blood sugar regulation, insulin resistance, and long-term metabolic health.

Her integrated approach combines:

• Clinical bodywork and anatomical expertise

• Deep understanding of stress, sleep, and hormone balance

• Nutritional strategies rooted in science

• Practical tools to support behaviour change

• Nutrigenomics to activate your body's natural healing powers

Sim now helps individuals reclaim their energy, reduce inflammation, improve sleep, and prevent lifestyle-driven conditions such as type 2 diabetes, obesity, and chronic fatigue using a no-nonsense, science-backed approach that fits real life.

She’s lived both burnout and recovery. That’s what makes her work grounded in passion, relatability, and deep empathy.

Richard’s journey into exercise instruction and nutrition counseling began with a pivotal moment in 1981, when he discovered High-Intensity Strength Training (HIT) through The Nautilus Bodybuilding Book by Ellington Darden, PhD. Captivated by the science and logic behind this revolutionary approach, Richard was drawn to its emphasis on efficiency, precision, and safety.

Over the next four decades, his dedication to this method only deepened as research continued to validate what he experienced firsthand: brief, intense, and infrequent workouts can deliver exceptional results—without the joint stress and overuse injuries often associated with conventional training.

Even while pursuing a successful 30-year career in financial services, Richard maintained his HIT practice and philosophy, eventually competing in natural bodybuilding contests—training less than 20 minutes per week while achieving remarkable results.

Ultimately, he chose to turn his lifelong passion into his vocation. Today, Richard is dedicated to helping others unlock their physical potential, whether that means building strength and vitality for daily life or pursuing peak performancein athletic or aesthetic goals. His mission is simple: to help people live stronger, longer, and better.

Certified in High-Intensity Strength Training (HIT), Richard is respected and frequently consulted by peers in the global strength-training community.

Becoming a Certified Coach with Insulin IQ was a natural extension of his work. Inspired by the research of Dr. Ben Bikman and others, Richard recognized that managing insulin resistance—along with proper recovery and sleep—is central to optimizing long-term health and body composition for his clients.

In addition, Richard is certified to facilitate content from Stephen Covey’s The 7 Habits of Highly Effective People. He integrates these timeless principles into his coaching practice, bridging the gap between mindset, habit formation, and physical transformation.

🔬 [EN] Researcher in Pharmacy and Biochemistry passionate about metabolic health. I focus on type 2 diabetes, obesity, insulin resistance, mental health, food addiction, and the metabolic roots of cancer. 

🧬 [PT] Pesquisador em Farmácia e Bioquímica com paixão pela saúde metabólica. Atuo com diabetes tipo 2, obesidade, resistência à insulina, saúde mental, compulsão alimentar e as raízes metabólicas do câncer. 

🇺🇸 English Version – From Collapse to Liberation: My Calling to True Healing

By Márcio Conte

After more than 15 years watching my own health deteriorate — shelves full of medications to manage all the so-called “diseases of prosperity” — my system finally collapsed. On February 1st, 2020, despite taking over 12 medications daily, I suffered a drug-induced seizure. That moment changed the course of my life.

When I regained consciousness, I realized something crucial: the medications weren’t healing me; they were merely suppressing symptoms. Conventional medicine had failed me. Even as a Pharmacy and Biochemistry student at EPM – Escola Paulista de Medicina, I came to a painful realization: we were being trained not to promote health, but to treat disease. I was deeply frustrated.

That’s when I decided to take charge and search for healing myself. In one of those talks, I discovered a so-called “heretic” doctor — often ridiculed in academia and banned from mainstream media — who spoke the truth with courage: Dr. Lair Ribeiro, a cardiologist and expert in nutrition. He mentioned the ketogenic diet as an alternative therapy for drug-resistant epilepsy and recommended a film starring Meryl Streep called First Do No Harm, based on the true story of a boy named Charlie.

I found the cure that freed me from these “modern world diseases.” I thank God for the existence of these brave doctors, who endure mockery and persecution for doing what is right in the service of life. These heroes deserve our respect — and I now follow their example so that others may also find freedom from the global disease industry.

In seeking to prevent another seizure, I ended up healing from much more:
obesity, insulin resistance, type 2 diabetes, metabolic syndrome, hypertension, acid reflux, chronic gastritis, H. pylori infection, and depression.
My self-esteem returned. My physical, mental, emotional, and intellectual strength was restored.
My academic path was redirected toward promoting true, full-spectrum health. Because yes — it is possible.

I now feel a deep calling:
“To heal the sick and set the captives free.”

[PT] - Do Naufrágio à Libertação: Meu Chamado pela Verdadeira Cura

Depois de mais de 15 anos assistindo ao naufrágio da minha própria saúde, com prateleiras repletas de medicamentos para controlar as chamadas “doenças da prosperidade”, meu corpo entrou em colapso. Em 01/02/2020, mesmo tomando mais de 12 medicamentos diários, sofri uma convulsão medicamentosa. Aquela experiência mudou o curso da minha vida.

Quando voltei a mim, recobrei também a consciência: os medicamentos não estavam me curando, apenas mascaravam os sintomas. A medicina ortodoxa falhara comigo. Como estudante de Farmácia e Bioquímica na EPM – Escola Paulista de Medicina, percebi com dor que estávamos sendo treinados para tratar doenças, e não para promover saúde. Isso me frustrou profundamente.

Decidi então buscar por conta própria uma solução real. Em uma dessas buscas, encontrei um médico herético – perseguido pela “santa inquisição” da medicina moderna – que falou de cura com coragem: Dr. Lair Ribeiro, cardiologista e mestre em Nutrologia. Ele mencionou a dieta cetogênica como alternativa terapêutica para convulsões epilépticas refratárias e indicou o filme First Do No Harm (Pela Vida do Meu Filho), baseado na história real do pequeno Charlie.

Encontrei a cura que me libertou das doenças do mundo moderno. Agradeço profundamente a Deus e a esses médicos corajosos que, apesar da zombaria e perseguição, fazem o que é certo em favor da vida. São heróis. A eles, tiro meu chapéu. E sigo seu exemplo, para que outros também possam se libertar do mercado internacional da doença.

Buscando evitar uma nova convulsão, acabei sendo curado de muito mais:
obesidade, resistência à insulina, diabetes tipo 2, síndrome metabólica, hipertensão, refluxo, gastrite crônica, H. pylori e depressão.
Minha autoestima voltou. Meu vigor físico, mental, emocional e intelectual foi restaurado.
Minha vida acadêmica foi redirecionada para promover saúde plena. Porque sim — é possível.

Tenho um chamado: “Curar os enfermos e libertar os cativos.”

I’m a certified practitioner in metabolic and women’s hormone health, helping my clients uncover the root causes behind symptoms such as fatigue, weight gain, digestive issues, PMS and (peri)menopausal changes.

My approach combines evidence-based functional medicine, nutrition, lifestyle and holistic health principles, recognizing that metabolism, hormones, gut health, stress and lifestyle are all interconnected. Next to blood tests, I like to use DNA and DUTCH (dried urine test for comprehensive hormones) testing, for targeted insights into my clients unique physiology.

Originally from Finland and now based in the Netherlands, I’m passionate about empowering women with personalized guidance, education and sustainable strategies that support long-term wellbeing — not just symptom management.