The Biological 
Labs &
Biomarkers
What you can't measure, you can't optimize. The complete guide to bloodwork, wearables, and the biomarkers that actually predict how long — and how well — you'll live.
Start With BloodworkAll Lab Content
The Optimal Male Bloodwork Panel
The exact markers every man over 35 should test — total T, free T, SHBG, estradiol, thyroid, metabolic markers — and the optimal ranges most doctors don't know about.
Best Direct-to-Consumer Lab Testing
Order your own bloodwork without a doctor's referral. We compared the top services on price, panel depth, and turnaround.
Read ArticleHow to Read Your Testosterone Lab Results
Total T, free T, SHBG, E2 — what each number means and what optimal actually looks like.
Read ArticleWHOOP vs Oura Ring vs Garmin
The three best health wearables compared. HRV, sleep staging, and recovery tracking head-to-head.
Read ArticleLevels Health CGM Review
Continuous glucose monitoring for metabolic optimization. Is it worth it if you're not diabetic?
Read ArticleMarek Health
Most comprehensive panels. Optimization-focused physicians.
The most comprehensive direct-to-consumer lab platform. Order full hormone panels, interpret your results, and connect with optimization-focused physicians who understand what optimal — not just normal — looks like.
Visit Marek HealthHealth Wearables
The devices that give you continuous data between lab draws — tracking HRV, sleep, glucose, and readiness 24/7.
WHOOP 4.0
Best for daily recovery scoring and strain tracking. What Todd uses.
Oura Ring Gen3
Most accurate sleep staging. Best readiness score. Most discreet.
Levels Health CGM
Continuous glucose monitor. Reveals how food and stress affect your metabolism.
Garmin Fenix 7
Best all-around sports watch. Zone 2 HR monitoring, VO2 max, training load.
Bloodwork Optimization Stack
The supplements most likely to move your key biomarkers in the right direction — all on iHerb.
Vitamin D3 + K2
Moves Vitamin D from deficient to optimal (60–80 ng/mL target). Supports testosterone.
Omega-3 (EPA/DHA)
Lowers hsCRP and triglycerides. Most impactful supplement for cardiovascular markers.
Magnesium Glycinate
Reduces cortisol markers and improves sleep quality. Most men are deficient.
Zinc Bisglycinate
Supports testosterone production. Deficiency suppresses free testosterone.
Get the Optimal Bloodwork Template
The complete panel with optimal ranges, interpreted — not just flagged. Know exactly what to order and what your numbers mean.