Dr. Vedanti Wagh on Instagram: "Only colors I trust: purple, blue, red, yellow—the toxic ones 💀 🧪 Types of Vacutainers 1️⃣Purple • Additive: EDTA • Used for: CBC, Hb, Platelet count, Peripheral smear 2️⃣Blue • Additive: Sodium Citrate • Used for: Coagulation tests — PT, INR, APTT 3️⃣ Red • Additive: No additive / Clot activator • Used for: Serology, HIV, Hepatitis markers 4️⃣ Grey • Additive: Sodium Fluoride + Potassium Oxalate • Used for: Blood glucose 5️⃣ Yellow • Additive: SST (Gel separato