Ginger settles nausea most reliably in early pregnancy, less so after surgery or cancer treatment. It modestly eases joint pain and more strongly eases menstrual pain, and lowers blood sugar and blood pressure when starting values are raised. Effects on blood fats, body weight and headache are inconsistent. Stomach irritation and heartburn, rising with dose, are what stop most people. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Fasting glucose | 75–86 mg/dL | Detects both the intended glycaemic benefit and additive hypoglycaemia |
| Glycated haemoglobin | 4.8–5.3% | Three-month average glucose; the endpoint that moved most consistently in trials |
| High-sensitivity C-reactive protein | Below 0.8 mg/L | The inflammation marker ginger reduced across sixteen trials |
| Home blood pressure | 110–120 / 70–78 mmHg | Captures both the benefit and additive hypotension with antihypertensives |
| Fasting triglycerides | Below 80 mg/dL | The lipid fraction with the largest reported ginger effect |
| Low-density lipoprotein cholesterol | Below 100 mg/dL, lower with cardiovascular risk | Second lipid endpoint; results across meta-analyses conflict |
| Alanine aminotransferase | Below 25 U/L in men, below 20 U/L in women | Liver enzyme that fell in fatty-liver trials; also screens for any hepatic irritation |
| International normalised ratio | Individual target set by the prescriber, usually 2.0–3.0 | Only relevant on warfarin; confirms no clotting shift from added ginger |
| Blood lead | Below 1.0 µg/dL | Relevant only for heavy daily use of bulk ginger powder of unverified origin |
Cadence: Baseline before starting, then rechecks at 8 weeks and 6 months, then annually if continuing. Symptom scores and home blood pressure weekly through the first two months; fasting glucose twice weekly for the first month on insulin or an insulin secretagogue.