Hello reader,
Let me start with something that might surprise you:
Your ability to think clearly, maintain a healthy weight, have good sex, avoid dementia, and live a long, vibrant life all depend on one thing: your metabolic health.
Not your willpower. Not your genetics. Not even how much you exercise.
Your metabolic health – specifically, how well your body handles insulin and glucose – is the foundation everything else is built on.
And here’s the problem: most people have no idea their metabolic health is broken until they’re diagnosed with prediabetes, type 2 diabetes, heart disease, or cognitive decline. By then, years of damage have already accumulated.
But it doesn’t have to be this way.
Understanding how insulin works – and what happens when it stops working properly – is one of the most important things you can do for your health. Let me explain why.
Insulin 101: The Master Growth Hormone
Think of insulin as your body’s “storage and growth” hormone. Every single cell in your body has an insulin receptor, which means insulin affects literally everything – your brain, your muscles, your fat cells, your liver, your heart, your reproductive organs.
Insulin’s job is simple:
- Promote growth and storage
- Inhibit breakdown and release
When you eat, your blood sugar rises. Your pancreas releases insulin. Insulin tells your cells to take in glucose (sugar) from your bloodstream and either use it for energy or store it for later.
This system is brilliant when it works properly. But here’s the catch:
Insulin’s primary effect is to promote growth. In small amounts at the right times, this is good – it builds muscle, supports healing, provides energy. But when insulin is constantly elevated – which happens with insulin resistance – cells are constantly being told to grow, grow, grow.
And we have a word for cells that never stop growing: cancer.
Cells need to know when to stop growing. They need periods of rest, repair, and cleanup (autophagy). When insulin is chronically elevated, this balance is destroyed.
Metabolism: It’s All About Balance
Metabolism isn’t just about how fast you burn calories. It’s about the balance between two opposing forces:
Anabolic processes – building up, growing, storing (insulin drives this)
Catabolic processes – breaking down, cleaning up, burning (happens when insulin is low)
You need both. Growth and breakdown. Storage and release. Build and repair.
Modern life keeps most people stuck in anabolic mode – constantly eating, constantly spiking insulin, never giving the body time to shift into breakdown and cleanup mode.
This is why people struggle with:
- Weight that won’t budge
- Stubborn belly fat
- Low energy
- Brain fog
- Poor sleep
- Hormonal issues
- Accelerated aging
Your body needs periods of low insulin to burn fat, clean up damaged cells, boost metabolism, and stay healthy.
The Three Primary Causes of Insulin Resistance
Insulin resistance is when your cells stop responding properly to insulin. Your pancreas pumps out more and more insulin trying to get the same effect. Eventually, you have chronically high insulin levels, which wreaks havoc on every system in your body.
What causes this? Three main culprits:
1. Chronic Stress
When you‘re stressed, your body releases cortisol and epinephrine (adrenaline). These stress hormones do two things:
- Raise your blood sugar (to give you energy to fight or flee)
- Increase insulin (to handle that elevated blood sugar)
In short bursts, this is fine. You‘re not actually being chased by a tiger, but your body releases glucose as if you were. Then insulin stores it away.
The problem is chronic stress – work deadlines, financial pressure, relationship conflict, poor sleep, overtraining, constant stimulation.
Your body never gets a break. Cortisol stays elevated. Blood sugar stays elevated. Insulin stays elevated.
Over time, your cells become resistant to insulin’s signal. Chronic stress literally creates insulin resistance and metabolic dysfunction.
2. Inflammation
Inflammation and insulin resistance create a vicious cycle.
Inflammation increases insulin resistance. When your body is inflamed (from poor diet, gut issues, toxins, chronic infections, autoimmune conditions), inflammatory molecules interfere with insulin signaling. Your cells can’t respond to insulin properly.
Insulin resistance increases inflammation. High insulin promotes inflammatory pathways and prevents the body from resolving inflammation.
Round and round it goes – inflammation → insulin resistance → more inflammation → worse insulin resistance.
Common sources of chronic inflammation:
- Poor diet (processed foods, sugar, seed oils)
- Gut dysfunction (dysbiosis, leaky gut)
- Chronic infections
- Environmental toxins
- Lack of sleep
- Sedentary lifestyle
3. Overfeeding
This one is simple: eating too often and too much, especially carbohydrates and sugar.
Every time you eat, insulin rises. If you‘re constantly eating (three meals plus snacks, grazing all day), insulin never has a chance to drop.
Add in a diet high in processed carbohydrates and sugar, and you‘re spiking insulin repeatedly throughout the day.
Your cells become overwhelmed. They’re constantly being told to take in more glucose when they’re already full. Eventually, they stop listening – that’s insulin resistance.
Why This Matters for Your Hormones
For Men: Insulin Resistance Destroys Testosterone
Here’s something most men don’t know: your fat cells contain an enzyme called aromatase that converts testosterone into estrogen.
When you‘re insulin resistant:
- You accumulate more visceral fat (belly fat)
- More fat = more aromatase = more testosterone being converted to estrogen
- This creates a vicious cycle: Low testosterone → more belly fat → even lower testosterone
The result:
- Decreased muscle mass
- Increased body fat (especially belly fat)
- Low energy and motivation
- Poor libido
- Impaired spermatogenesis (sperm production)
- Mood issues
And here’s the kicker: Erectile dysfunction’s primary cause is insulin resistance.
ED isn’t just about testosterone. It’s about vascular health. Insulin resistance damages blood vessels, impairs nitric oxide production (critical for erections), and creates endothelial dysfunction.
Men: If you‘re struggling with low testosterone, ED, or difficulty building muscle and losing fat – check your metabolic health first. No amount of testosterone therapy will work optimally if your insulin resistance isn’t addressed.
For Women: Insulin Resistance Disrupts Everything
Insulin resistance affects women’s hormones profoundly:
PCOS (Polycystic Ovary Syndrome) is fundamentally a metabolic disorder driven by insulin resistance. High insulin triggers the ovaries to produce excess androgens (male hormones), causing irregular periods, acne, unwanted hair growth, and difficulty conceiving.
Estrogen dominance – insulin resistance impairs the liver’s ability to clear estrogen properly, leading to estrogen dominance relative to progesterone. This causes heavy periods, PMS, breast tenderness, mood swings, and increased breast cancer risk.
Weight gain – especially around the midsection. Insulin resistance makes it nearly impossible to lose weight because your body is stuck in “storage mode.”
Infertility – insulin resistance affects ovulation, egg quality, and implantation.
Menopausal symptoms – insulin resistance makes hot flashes, weight gain, and metabolic changes at menopause significantly worse.
Women: If you‘re struggling with hormonal issues, unexplained weight gain, PCOS, or difficult menopause – your metabolic health is likely the root cause.
Why This Matters for Your Brain
Here’s something that should terrify and motivate you:
Alzheimer’s disease is increasingly being called “Type 3 Diabetes.”
Your brain runs on two fuels: glucose and ketones.
When you become insulin resistant, your brain cells become insulin resistant too. They can’t effectively use glucose for energy. Your brain is literally starving while surrounded by sugar it can’t access.
Normally, when glucose isn’t available, your body makes ketones (from fat) as an alternative brain fuel. But here’s the problem: high insulin prevents ketone production.
So you end up with:
- A brain that can’t use glucose efficiently (insulin resistance)
- A brain that can’t access ketones (because insulin is too high)
- Cognitive decline, memory issues, brain fog, and eventually dementia
This is why cognitive decline is fundamentally linked to insulin resistance. It’s not just “getting older.” It’s metabolic dysfunction affecting your brain.
The earlier you address insulin resistance, the more you protect your brain.
Interestingly, this is also why ketogenic diets can be remarkably effective for neurological issues like migraines, epilepsy, and early cognitive decline – they provide the brain with ketones when glucose metabolism is impaired.
Why This Matters for Your Weight and Metabolism
Here’s something the diet industry doesn’t want you to know:
Low insulin = increased basal metabolic rate.
When insulin is low, your body shifts into fat-burning mode. Your metabolic rate increases. You burn stored fat for energy. Your body cleans up damaged cells. Inflammation decreases.
When insulin is chronically high (insulin resistance), the opposite happens:
- Your metabolism slows down
- Your body can’t access stored fat
- You‘re constantly hungry (because your cells aren’t getting energy efficiently)
- You gain weight easily and can’t lose it
This is why “eat less, move more” fails for people with insulin resistance. You‘re fighting against your hormones and metabolism.
Fix the insulin resistance, and weight loss becomes dramatically easier – not because you have more willpower, but because your body can finally access its stored energy.
What You Can Do About It
The good news: insulin resistance is reversible. Your metabolic health can be restored. But it requires a comprehensive approach.
1. Time-Restricted Eating
Give your body extended periods without food so insulin can drop.
- Start with 12-14 hours between dinner and breakfast (e.g., finish dinner by 7pm, eat breakfast at 9am)
- Progress to 16:8 if appropriate (16 hours fasting, 8-hour eating window)
- This gives your body time to shift into fat-burning, cleanup mode
2. Reduce Eating Frequency
Stop snacking. Eat 2-3 meals per day rather than grazing constantly.
Every time you eat, insulin rises. The more frequently you spike insulin, the more resistant you become.
3. Choose Your Carbohydrates Wisely
- Minimize processed carbs and sugar – these spike insulin dramatically
- Prioritize protein and healthy fats – these have minimal insulin impact
- Eat carbs strategically – if you‘re active, time carbs around workouts
- Focus on fiber-rich, whole-food carbs – vegetables, limited fruit, properly prepared grains if tolerated
4. Manage Stress
Remember: chronic stress = high cortisol = high blood sugar = high insulin = insulin resistance.
- Prioritize sleep (7-9 hours)
- Practice stress management (meditation, breathwork, nature, hobbies)
- Don’t overtrain – excessive exercise is a stressor
- Address the root causes of stress, don’t just manage symptoms
5. Address Inflammation
- Heal your gut – most inflammation starts in the gut
- Eat anti-inflammatory foods – omega-3s, colorful vegetables, polyphenols
- Avoid inflammatory foods – processed foods, seed oils, excessive sugar
- Optimize vitamin D, omega-3s, magnesium
6. Exercise Strategically
- Resistance training – builds muscle, which is metabolically active and improves insulin sensitivity
- High-intensity interval training – brief, intense exercise improves insulin sensitivity
- Walking – low-intensity movement helps regulate blood sugar without stressing the body
- Avoid chronic cardio – long, moderate-intensity cardio can be a stressor and increase cortisol
7. Test Your Metabolic Health
Don’t wait until you‘re diagnosed with diabetes. Get these labs:
- Fasting insulin (should be <5, ideally <3)
- Fasting glucose (should be <90)
- HbA1c (should be <5.4%)
- Triglycerides (should be <100)
- HDL cholesterol (should be >50 for women, >40 for men)
- Triglyceride to HDL ratio (should be <2, ideally <1)
If your fasting insulin is above 5, you have insulin resistance – even if your glucose is “normal.” This is your early warning system.
The Bottom Line
Your metabolic health is not just about preventing diabetes. It’s about:
For Men:
- Maintaining healthy testosterone levels
- Preventing erectile dysfunction
- Building muscle and losing fat
- Sustaining energy and drive
For Women:
- Balancing hormones naturally
- Managing PCOS and estrogen dominance
- Maintaining healthy weight
- Navigating menopause smoothly
For Everyone:
- Protecting your brain from dementia
- Maintaining a healthy metabolism
- Reducing inflammation and disease risk
- Optimizing energy and vitality
- Living longer and better
Insulin resistance is the root cause of most chronic diseases – type 2 diabetes, heart disease, Alzheimer’s, many cancers, PCOS, fatty liver disease, and more.
But here’s the empowering truth: you have control over this.
Your metabolic health is determined by your daily choices – what you eat, when you eat, how you manage stress, how you move, how you sleep.
It’s not about perfection. It’s about consistency. Small, sustainable changes compound over time.
Start today:
- Stop snacking
- Extend your overnight fast
- Reduce processed carbs and sugar
- Manage your stress
- Move your body
- Get your labs checked
Your future self – with a sharp mind, balanced hormones, healthy weight, and abundant energy – will thank you.
Want personalized support to optimize your metabolic health?
At The Gajer Practice, I work with individuals who are ready to address the root causes of metabolic dysfunction through comprehensive testing, personalized nutrition, targeted supplementation, hormone optimization, and lifestyle medicine.
