Systemic Immune-Inflammation Index (SII)

Specialist

also

What it isA calculated composite using platelets, neutrophils, and lymphocytes that captures inflammation and immune balance in one number.

DoesIntegrates three independent prognostic markers into a stronger composite predictor.

GoodA low SII signals balanced immune-inflammatory tone and tracks better outcomes across diseases.

BadElevated SII predicts mortality in cancer, cardiovascular disease, and chronic inflammation.

Standard
Lab-specific.
Optimal
200–450 (lower is good)
Modifiers
Rises with infection, stress, smoking.

How to optimize

Lifestyle
Sleep, stress management, resistance training, quit smoking.
Diet
Mediterranean pattern; cut ultra-processed food.
Supplements
Omega-3 EPA+DHA (2–4g/day), curcumin (500mg 2×/day).
Peptides
Thymosin alpha-1.
Drugs
Treat underlying cause.