09/11/2026
In this episode of Ask Dr. Boyd, Dr. Boyd sits down with Catalina, a 62-year-old nutritionist who spent 30 years educating others about food and still ended up with a type 2 diabetes diagnosis. Together they break down what functional medicine testing actually looks at, why stress and cortisol silently drive insulin resistance, how leaky gut connects to thyroid disease, and why the birth control pill may be doing more harm than most doctors realize.
What's covered:
Why a healthy non-overweight person can develop type 2 diabetes
How cortisol and chronic stress drive insulin resistance without obvious symptoms
The difference between functional medicine testing and conventional testing
What 90,000 daily plastic particles are doing to your gut and hormones
Why 16 toxins in local water matter and what to do about it
Growth hormones and antibiotics in meat and what they do to your body
Hypothyroidism vs Hashimoto's: they are not the same condition
How gluten mimics thyroid tissue and makes autoimmune thyroid disease worse
The 12-week autoimmune protocol diet explained
Why birth control pills shut down hormones and what to use instead
Chapters:
00:00 – Welcome to Ask Dr. Boyd & introduction to Catalina
00:48 – Why Catalina came to see Dr. Boyd: overwhelming post-meal fatigue
02:11 – Catalina's type 2 diabetes diagnosis & insulin resistance
03:06 – How functional medicine testing differs from conventional medicine
05:31 – Treating the whole body: lifestyle, diet & activity as one system
06:30 – Longevity medicine vs disease oriented medicine
07:30 – The three pillars of longevity medicine
08:25 – How a 30 year nutritionist ended up with type 2 diabetes
10:20 – How stress and cortisol drive insulin resistance without you knowing
11:43 – The cortisol and insulin cycle that leads to type 2 diabetes
13:41 – Gut health explained: good bacteria, bad bacteria & leaky gut
15:36 – IBS, Crohn's, gastritis & colitis: what these diagnoses actually mean
16:32 – Why PPI medications for reflux are linked to Alzheimer's dementia
17:32 – Why inflammation is not mild: the splinter and hot stove analogy
18:58 – 90,000 plastic particles consumed every single day
19:55 – How plastics in your kitchen are entering your body every meal
21:46 – Toxins in local water & growth hormones in meat
24:39 – What meats are recommended: grass-fed, grass-finished & organic
25:37 – Why protein matters more as you age
26:31 – Why a reverse osmosis system and shower filter are essential
28:25 – Hypothyroidism vs Hashimoto's: what is the difference?
30:50 – Hashimoto's is an autoimmune disease caused by gut permeability
33:13 – How gluten mimics thyroid tissue & worsens Hashimoto's
35:39 – The 30-day elimination protocol to test for gluten sensitivity
37:31 – The 12-week autoimmune protocol diet explained
38:59 – Why birth control pills are harmful to hormones at every age
41:30 – How birth control affects fertility and hormone recovery for years
42:28 – What to use instead: the IUD explained