1 Blood Pressure 120/80 mmHg Recommended test: Sphygmomanometer (manual or digital BP cuff) reading. Check at rest, seated, arm at heart level. Recheck if above 130/80 on repeated readings. 2 Pulse (Heart Rate) 60–100 bpm Recommended test: Manual pulse check (wrist/neck) for 60 seconds, or pulse oximeter/ECG for accuracy. Note irregular rhythms and report them. 3 Body Temperature 36.5–37.5 °C Recommended test: Digital thermometer (oral, ear, or forehead). Persistent readings above 38°C (100.4°F) warrant medical evaluation. 4 Respiratory Rate 12–20 breaths/min Recommended test: Manual count of breaths for 60 seconds at rest, or pulse oximetry (SpO2) to also check oxygen saturation. 5 Hemoglobin (Male) 13.5–17.5 g/dL Recommended test: Complete Blood Count (CBC). Low values may indicate anemia; consult a physician for iron/B12/folate work-up if outside range. 6 Hemoglobin (Female) 12.0–15.5 g/dL Recommended test: Complete Blood Count (CBC). Low values may indicate anemia; consult a physician for iron/B12/folate work-up if outside range. 7 Total Cholesterol < 200 mg/dL Recommended test: Fasting Lipid Panel (Total, LDL, HDL, Triglycerides). Fast 9–12 hours before the blood draw for accurate results. 8 Potassium 3.5–5.0 mmol/L Recommended test: Basic/Comprehensive Metabolic Panel (BMP/CMP) blood test. Abnormal levels can affect heart rhythm — seek prompt medical review if flagged. 9 Sodium 135–145 mmol/L Recommended test: Basic/Comprehensive Metabolic Panel (BMP/CMP) blood test, part of routine electrolyte screening. 10 Triglycerides < 150 mg/dL Recommended test: Fasting Lipid Panel. Fast for 9–12 hours; avoid alcohol for 24 hours before the test. 11 Total Blood Volume ~5–6 L Not a routine single test — estimated from body weight/sex by a clinician; relevant mainly in surgical, trauma or transfusion settings. 12 Fasting Blood Sugar (Adult) 70–99 mg/dL Recommended test: Fasting Plasma Glucose test (8+ hours fasting) or HbA1c for a 3‑month average. Repeat testing if borderline. 13 Fasting Blood Sugar (Children) 70–100 mg/dL Recommended test: Fasting Plasma Glucose test, done under pediatric guidance. Discuss fasting duration with a pediatrician first. 14 Iron (Serum) 60–170 µg/dL Recommended test: Serum Iron panel, often paired with Ferritin, TIBC and Transferrin Saturation for a full iron-status picture. 15 White Blood Cells (WBC) 4,000–11,000 /µL Recommended test: Complete Blood Count (CBC) with differential. Abnormal counts may indicate infection, inflammation, or other conditions — needs clinical correlation. 16 Platelets 150,000–400,000 /µL Recommended test: Complete Blood Count (CBC). Very low or high counts should be discussed with a doctor, especially before any procedure. 17 Red Blood Cells (Male) 4.7–6.1 million/µL Recommended test: Complete Blood Count (CBC), often reviewed together with Hemoglobin and Hematocrit. 18 Red Blood Cells (Female) 4.2–5.4 million/µL Recommended test: Complete Blood Count (CBC), often reviewed together with Hemoglobin and Hematocrit. 19 Calcium (Total) 8.6–10.2 mg/dL Recommended test: Serum Calcium as part of a Metabolic Panel; if abnormal, a clinician may add Vitamin D, Parathyroid hormone (PTH), or Albumin-corrected calcium. 20 Vitamin D (25-OH) 20–50 ng/mL Recommended test: 25-Hydroxy Vitamin D blood test. No fasting required. Consider retesting seasonally if supplementing. 21 Vitamin B12 200–900 pg/mL Recommended test: Serum Vitamin B12 test; a Methylmalonic Acid (MMA) test can confirm a true deficiency if B12 is borderline.