Pu-erh tea, a fermented dark tea from southwest China, is drunk as a low-cost daily habit to help manage weight and blood fats. Small, short trials, mostly of concentrated extracts, show a small drop in body weight and belly fat; effects on blood fats, blood sugar and blood pressure differ between studies. Main risks: caffeine-disrupted sleep, reduced iron uptake with meals and food-pipe cancer when drunk scalding hot. (Full Review)
| Marker | Target | Why |
|---|---|---|
| ApoB | <80 mg/dL (<60 mg/dL at higher risk) | Main lipid target |
| LDL cholesterol | <100 mg/dL | Trial lipid endpoint |
| Triglycerides | <100 mg/dL | Most responsive lipid |
| HDL cholesterol | 50–80 mg/dL | Lipid context |
| Fasting glucose | 75–90 mg/dL | Glycemic effect |
| HbA1c | <5.4% | Longer-term glucose |
| Fasting insulin | 2–6 µIU/mL | Insulin sensitivity |
| Ferritin | 50–150 ng/mL | Iron-absorption risk |
| Hemoglobin | 13.5–15.5 g/dL (women), 14–17 g/dL (men) | Iron deficiency check |
| eGFR | >90 mL/min/1.73 m² | Fluoride clearance |
| ALT | <25 U/L | Liver screen |
| Waist circumference | <80 cm (women), <94 cm (men) | Visceral fat proxy |
| Home blood pressure | <120/80 mmHg | Blood-pressure effect |
| Urinary fluoride (heavy drinkers only) | No established functional target; track change from own baseline | Fluoride load |
| Body weight | Compared with own starting point | Marker pu-erh may shift |
Cadence: Baseline before regular intake; lipids, glucose, weight and blood pressure at 12 weeks, then every 6–12 months; ferritin, hemoglobin and kidney function every 12 months above 5 g leaf daily, or sooner with fatigue or heavy menstrual loss