TJ Testosterone JournalEvidence Review

Editorial Team

Our contributors

Every review published here is written or reviewed by a contributor with a research or clinical background in the relevant field. None holds a financial interest in the products reviewed.

EV
Dr. Elena Vasquez, PhD
Endocrine Pharmacology

Elena Vasquez holds a doctorate in pharmacology with a research focus on steroidogenesis and endocrine-disrupting compounds. She spent nine years in academic research before moving to independent science writing, and reviews all ingredient and formulation content on this site.
DO
Dr. Daniel Okafor, MD
Internal Medicine

Daniel Okafor is a board-certified internal medicine physician whose clinical interest is metabolic and hormonal health in men over forty. He writes on the gap between what patients read online and what a workup can actually establish.
MR
Marta Reinhardt, MSc
Nutritional Biochemistry

Marta Reinhardt holds a master's degree in nutritional biochemistry and previously worked in analytical quality control for a contract supplement manufacturer. She covers formulation, extract standardization and label analysis.
JC
Dr. Julian Chen, PhD
Sleep and Circadian Physiology

Julian Chen researches circadian regulation of endocrine function. His work examines how sleep architecture influences overnight hormone production, and he writes about the sleep side of male hormonal health.

Evidence, not marketing

A monthly summary of new research on male hormonal health, and what it does or does not change.