Episode 1: Testosterone replacement therapy side effects: 7 risks
February 14, 2026 · 10:08
TRT has predictable, often preventable side effects: monitor testosterone, hematocrit, PSA, and blood pressure.
Biomarkers
Understand the key biomarkers that reveal how your body is functioning, from hormone levels and inflammation markers to metabolic indicators. Tracking these critical health metrics helps you make informed decisions about training, nutrition, and overall optimization.
Most-read topics as podcast episodes
We only record episodes on the topics readers care about most.
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The essentials for biomarkers — then explore the latest posts below.
Function Health testosterone results: What “out of range” really means and what to do next
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Feb 09, 2026 · 13 min read
An “out of range” testosterone result means your value fell outside that lab’s reference interval, not that you have hypogonadism. The next step is to repeat a morning total testosterone and add confirmatory labs (free testosterone with SHBG, plus LH/FSH) interpreted alongside symptoms before deciding on treatment. “When a lab report says ‘normal’, it mostly ...
Keto diet and CGM: What your glucose level can look like and how to avoid reverse metabolic inflexibility
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Feb 07, 2026 · 12 min read
On a ketogenic diet, CGM traces usually show a lower, flatter 24-hour glucose curve, while an occasional high-carb meal can cause a higher peak and slower return to baseline because fat adaptation temporarily reduces rapid glucose disposal (“reverse metabolic inflexibility”) rather than proving true insulin resistance. Learn how to interpret trends despite interstitial fluid lag ...
Blueprint stack for heart and endothelium: What research says
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 30, 2026 · 12 min read
For men, the Blueprint Stack can help simplify a protein-forward, Mediterranean-leaning breakfast routine that may improve cardiometabolic markers. But the branded supplement bundle itself has limited direct evidence and can add cost and interaction risk. This blueprint stack review breaks down what’s actually in the stack as described, what the research says about the major ...
Inflammation and heart disease in men: What to test and what to do next
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 28, 2026 · 11 min read
Chronic, low-grade inflammation is a proven risk factor for atherosclerotic heart disease, and simple blood tests can detect it before symptoms appear. If your cholesterol looks “fine” but your family history, waistline, or energy say otherwise, inflammation may be the missing piece in your heart risk assessment. “Think of cholesterol as the building material for ...
What is the best supplement for inflammation? The 8 options with the strongest evidence
Dr. Susan Carter, MD: Endocrinologist & Longevity Expert
Jan 21, 2026 · 13 min read
There is no single best supplement for inflammation for every man, but a small group has the strongest human evidence for lowering inflammatory signals or improving inflammation driven symptoms. This guide breaks down the best supplements for inflammation, what they do in the body, and how to choose based on your goals and lab results. ...