10 markers in blood work that show gut issues/ parasites

In functional medicine, we use tighter lab ranges to catch early signs of gut-driven inflammation

Because “normal” doesn’t always mean optimal—and your body often whispers before it screams.

1.CRP / hs-CRP

Functional range: < 0.5–1.0 mg/L

Elevated levels can signal systemic inflammation, often linked to gut permeability or hidden infections.

2.Ferritin

Functional range: 50–100 ng/mL

High ferritin may reflect inflammation.

Low ferritin can point to malabsorption or chronic GI blood loss.

3. WBC (Functional range: 5:0-75 x10%/L)s 1

High WBC can indicate infection or inflammation; low WBC may signal chronic immune suppression or nutrient deficiencies from malabsorptions-CRP

4. Albumin/Globulin Ratio (Functional range:

1.5-2.2). Low ratio can indicate chronic inflammation, protein loss, or malabsorption

5. Eosinophils (Functional range: <3%).

Elevated eosinophils can signal food sensitivities, gut allergies inflammation, or parasites

6. Total Protein (Functional range: 6.9-7.4 g/ d) Low levels suggest malabsorption/ chronic inflammation

7. Iron Markers, (Serum Jron, TIBC, Transferrin Saturation) Low iron markers may indicate chronic Gl blood loss or malabsorption; high iron can reflect inflammation-driven dysregulation umin/Globulin Ratio

8. Vitamin B12 (Functional range for B12: 600-900 pg/mL). Low B12 suggests malabsorption from ileal inflammation/dysbiosis

BUN/Creatinine Ratio (Functional range: 10-

16). Elevated ratio may indicate cl bleeding or catabolic stress; low ratio may suggest poor protein digestion or absorption

10. Cholesterol / LDL (Functional range for LDL:

80-120 mg/dL). Elevated cholesterol or LDL can reflect the body's attempt to bind and neutralize bacterial endotoxins from Leaky Gut