Keep
competing.

Use one complete panel from the same blood draw or report date. Don’t mix dates or guess missing values. Choose the units printed on your report.

Amateur: 9 markers +

Units accepted by the LWC pheno age calculator

Marker	Accepted units
White blood cell count (WBC)	10⁹/L or 10³/µL
Lymphocytes	% or absolute count in 10⁹/L or 10³/µL
Mean corpuscular volume (MCV)	fL
Red cell distribution width (RDW-CV)	%
Albumin	g/L or g/dL
Alkaline phosphatase (ALP)	U/L or µkat/L
Creatinine	µmol/L or mg/dL
Glucose	mmol/L or mg/dL
C-reactive protein (CRP or hs-CRP)	mg/L or mg/dL

Pro: those 9 + these 13 +

The bortz age model uses 21 markers. LWC also requires WBC to calculate both clocks and convert blood cell counts.

Additional markers and units accepted by the LWC bortz age calculator

Marker	Accepted units
Neutrophils	% or absolute count in 10⁹/L or 10³/µL
Monocytes	% or absolute count in 10⁹/L or 10³/µL
Red blood cell count (RBC)	10¹²/L or 10⁶/µL
Mean corpuscular hemoglobin (MCH)	pg
Alanine aminotransferase (ALT)	U/L or µkat/L
Gamma-glutamyl transferase (GGT)	U/L or µkat/L
Urea / blood urea nitrogen (BUN)	Urea in mmol/L or mg/dL; BUN in mg/dL
Cystatin C	mg/L or mg/dL
Hemoglobin A1c (HbA1c)	mmol/mol (IFCC) or %; HbA1c-derived eAG in mmol/L or mg/dL
Total cholesterol	mmol/L or mg/dL
Apolipoprotein A1 (ApoA1)	g/L or mg/dL
Sex hormone-binding globulin (SHBG)	nmol/L or µg/dL
Vitamin D (25-OH)	nmol/L, ng/mL or µg/L

Use RDW-CV (%), not RDW-SD (fL). Absolute lymphocyte, neutrophil and monocyte counts need same-test WBC. For CRP below detection, use the lab’s detection limit.

Calculate with your date of birth, test date and complete panel, then select “Join the leaderboard”. Add your profile, upload lab proof and follow the payment step. We review every application.

Approved profiles and proofs are public. Redact unrelated details before uploading or emailing a report. An email bloodwork check does not submit an application.

Amateur accepts historical tests. Pro accepts tests from January 1–December 31, 2026 and ranks ahead of Amateur in the Ultimate League. Any entry discounts appear during onboarding.

Only have DunedinPACE? You’ll need clinical bloodwork for these tracks. You can join the longevitymaxxing challenge without a blood test.