Is Hemastix a confirmatory test for blood?

• A. Yes
• B. No
• C. It is a confirmatory test but only in the lab
• D. It differentiates human vs animal blood

Answer: (B)

Hemastix functions as a presumptive screening tool for blood. It detects the presence of heme by a peroxidase-like reaction on the strip, so a color change (green) suggests blood but does not prove it. This method isn’t specific to blood alone—other substances with peroxidase activity can produce a similar color—and it cannot determine whether the blood is human or animal. Because of that lack of specificity, it’s not used as a confirmatory test. Confirmatory tests in forensic science aim to definitively establish that blood is present and often identify its origin, using methods like more specific chemical tests or antibody-based assays that can distinguish human blood. In short, Hemastix provides a quick screening signal, not a definitive confirmation, and it cannot tell human from non-human blood.