The Biological Shop the Stack
Every supplement, device, and tool recommended across this site — curated in one place.
All supplement links go to iHerb. All device links go directly to the brand. Affiliate disclosure →
Supplements
All available on iHerb — one cart, fast shipping, competitive pricing.
— Foundation
Vitamin D3 + K2 (Liquid)
Hormonal foundation. Most men are severely deficient. Liquid for best absorption.
Ultimate Omega (Fish Oil)
High-dose EPA/DHA for inflammation, cardiovascular, and brain health.
NAC (N-Acetyl Cysteine)
Liver support, antioxidant, glutathione precursor.
— Performance
— Recovery
— Hormones
Tongkat Ali (Standardized)
Natural testosterone support. LH stimulant. Pairs well with TRT phasing.
Boron Glycinate
Lowers SHBG, raises free testosterone. 3mg daily with fat.
Zinc Bisglycinate
Testosterone support. Deficiency directly suppresses free testosterone.
— Longevity
One-Stop Shop
Buy Everything on iHerb
Build your full stack in one cart. Competitive pricing, fast delivery.
TRT & Hormone Clinics
Telehealth clinics for testosterone optimization and advanced hormonal protocols.
Fountain TRT
Fastest intake (3-5 days). Best all-inclusive pricing.
The most streamlined online TRT experience. Fast intake, excellent monitoring, competitive pricing. Best for men new to TRT who want simplicity and quality.
Visit Fountain TRTDefy Medical
Most customizable protocols. Best for complex or advanced cases.
The most comprehensive option for complex hormonal cases. TRT, peptides, thyroid, HGH — fully customizable protocols. Best for experienced optimizers.
Visit Defy MedicalWearables & Tracking
WHOOP 4.0
Best for daily recovery scoring and strain tracking. What Todd wears daily.
Oura Ring Gen3
Most accurate sleep staging. Best readiness score. Most discreet form factor.
Levels Health CGM
Continuous glucose monitor revealing how food, stress, and sleep affect metabolism.
Garmin Fenix 7
Best all-around sports watch. Zone 2 HR monitoring, VO2 max, training load.
Books Worth Reading
Outlive
by Peter Attia, MD
The definitive longevity playbook. Reframes how to think about healthspan.
Testosterone for Life
by Dr. Abraham Morgentaler
The most balanced, evidence-based book on TRT from a Harvard urologist.
Lifespan
by David Sinclair, PhD
Why aging is a disease — and the science of reversing it.
The 4-Hour Body
by Tim Ferriss
The original self-experimentation bible. Still relevant for the optimization mindset.
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