Blog
Learn the system, not the shortcut
Plain, cited explanations of the physiology behind how you feel. No molecules, no dosing, no shortcuts being sold.
The Guide · Hormone and vitality
How resistance training supports healthy testosterone
Strength training changes body composition, sleep and insulin sensitivity, and all three interact with hormonal health. What the evidence supports, and what it does not.
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Biomarker Explainer · Metabolic health
Understanding ApoB and metabolic risk
Apolipoprotein B counts the particles that can lodge in an artery wall. Why a count often tells you more than a concentration.
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The Basics · Hormone and vitality
The basics of hormone health as you age
What actually changes, on what timescale, and why symptoms alone are a poor guide to what is going on.
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The Guide · Longevity and recovery
Sleep, recovery, and healthspan
The least glamorous input with some of the strongest evidence behind it, and what to do when the obvious advice has not worked.
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Biomarker Explainer · Metabolic health
Understanding HbA1c and what it misses
A three month average of blood glucose, useful and genuinely limited. What it tells you and what slips past it.
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The Basics · Longevity and recovery
Cardiorespiratory fitness, and why it keeps showing up
One of the strongest associations with long term mortality in the literature, and it is trainable at any age.
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The Guide · Longevity and recovery
Protein, muscle, and staying capable
Lean mass is not vanity. It is the buffer that decides how well the last decades go, and it needs both a stimulus and material.
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Biomarker Explainer · Metabolic health
Visceral fat, and why where it sits matters
Not all fat behaves the same way. The fat around your organs is metabolically different from the fat under your skin.
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The Basics · Hormone and vitality
Stress, cortisol, and what the word actually means
Cortisol is essential, rhythmic and widely misdescribed online. A short primer on what it does and what testing it can and cannot tell you.
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The Guide · Metabolic health
How to read a lab report without scaring yourself
Reference ranges are population statistics, not personal verdicts. How to look at your own results sensibly.
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The Guide · Longevity and recovery
How alcohol affects sleep, hormones, and metabolic health
One input touches all three of the areas this site covers, and most people underestimate it because the effect shows up the next day rather than the same night.
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The Guide · Longevity and recovery
Building health habits that actually stick
Most health plans fail at adherence rather than at design. What the behavior change research says about making a change survive past the first month.
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The Guide · Longevity and recovery
Exercise and the postmenopausal brain: what the science shows
A look at how movement supports cognition after menopause, the biology behind the benefit, and which types of exercise appear to help most.
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The Guide · Metabolic health
Why body composition beats scale weight for metabolic health
A look at how visceral fat, lean mass, and waist circumference shape metabolic and hormonal health, and why the number on the scale tells only part of the story.
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The Guide · Longevity and recovery
Strength as longevity medicine: what the 2026 guidelines confirm
New 2026 cardiac guidelines reaffirm that heavier resistance training and adequate protein are the core of muscle-centric aging. Here is what that means for your week.
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The Guide · Longevity and recovery
The real drivers of recovery: sleep, protein, and smart rest
The strongest evidence for recovery in healthy adults points to sleep, adequate protein and energy, and structured light activity. Supplements lag far behind.
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The Guide · Longevity and recovery
Tryptophan, mood and inflammation: what the biology actually shows
A look at how your body divides tryptophan between serotonin, kynurenine and microbial routes, and why inflammation may shape that split in mood biology.
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The Guide · Longevity and recovery
What your wearable can and cannot tell you about fitness
Cardiorespiratory fitness and grip strength predict healthspan, but wearables only approximate them. Here is how to read the numbers on your wrist.
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The Guide · Understanding your labs
Reading CGM data when you do not have diabetes
Continuous glucose monitors can reveal useful patterns in daily glucose, but in people without diabetes they are not standalone diagnostic tests. Here is how to read the data sensibly.
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The Basics · Longevity and recovery
What a peptide is
A peptide is a short chain of amino acids. It is smaller than a full protein, and it is not automatically a drug.
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The Guide · Longevity and recovery
Why I started SiriusRx
Eating well, training, and a cabinet full of supplements were already the routine, and nothing felt like a result I could point to. I started SiriusRx to help close that gap.
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- The Guide
- Longer reads that connect a topic to what you can actually do about it.
- Biomarker Explainer
- One marker at a time: what it is, why it matters, what moves it.
- The Basics
- Short primers, no assumed background.
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Looking for the lab reference?
The plain-language table of the markers that come up in this space now lives on the Resources page, alongside the rest of the reference material.