Vitamin A (Retinol)
3 mL (1.5 mL min.) Serum from 1 Red Top (No Additive) tube. Do not use SST gel barrier tubes. Separate Serum within 1 hour of collection. Ship refrigerated or Frozen. Wrap in aluminium foil to protect from light. Overnight fasting is mandatory.
Labs
Doctors
timely reporting
of Tests