GearCheck was created because standard lab reports don't speak the language of performance athletes. We built the tool we wished existed — one that reads your bloodwork in context, not in a vacuum.
Founder, GearCheck
Jelle built GearCheck to bridge the gap between raw lab data and actionable health insight for athletes using TRT and performance compounds. The mission is straightforward: make evidence-based blood marker interpretation accessible to everyone who needs it.
GearCheck turns a stack of numbers into a structured health picture — organized by organ system, flagged by severity, and written for athletes, not physicians.
Upload your lab results and receive a structured, athlete-adjusted interpretation of every marker — with context your standard report omits.
Understand what your values mean on TRT and AAS cycles, including compound-specific risks and evidence-based action thresholds.
Each report covers hormonal, hematologic, hepatic, lipid, renal, and metabolic markers — with a written health summary and follow-up priorities.
Track your markers over time to spot trajectories before they become problems. Compare panels across cycles and protocols.
GearCheck's reference ranges and interpretation logic are grounded in published clinical research, endocrinology literature, and established harm-reduction frameworks. Athlete-adjusted thresholds account for physiological differences that make standard population norms misleading for performance athletes — particularly for markers like AST, creatinine, hematocrit, and HDL.
GearCheck provides blood marker analysis and health education. Reports are for informational purposes only and do not constitute medical advice. Always consult a healthcare professional before making health decisions.
Upload your bloodwork and get a full marker-by-marker breakdown — free, in minutes, with athlete-specific context built in.
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