Qing Hao is the dried aerial parts of Artemisia annua, a fast-growing annual plant native to China and now cultivated worldwide. It has been used in Traditional Chinese Medicine since at least the 4th century CE, when the physician Ge Hong described cold-water preparations of the herb for 'intermittent fevers.' The plant gained global recognition in the 1970s when Chinese scientist Tu Youyou isolated artemisinin from it — a discovery that eventually earned her the 2015 Nobel Prize in Physiology or Medicine.

The plant's most studied active compound, artemisinin, works by reacting with iron inside infected red blood cells to release free radicals that destroy malaria parasites. Beyond malaria, the herb's flavonoids and artemisinin derivatives appear to help calm inflammatory pathways and may interfere with abnormal cell growth. The whole-herb preparation used in TCM works somewhat differently than isolated artemisinin — early research suggests the plant's synergistic compounds may enhance bioavailability and add immune-modulating effects.

Traditional TCM preparation is a cold-water tea or fresh-juice extraction — importantly, heat destroys much of the artemisinin, which is why classical texts specifically recommended cold or pressed preparations. Modern standardized capsules and tablets contain measured artemisinin content (typically 100–200 mg artemisinin per serving). Pharmaceutical artemisinin derivatives used in clinical malaria treatment are prescription medications distinct from the herbal supplement.

• Malaria and drug-resistant malaria
• Fever and heat illness
• Inflammatory conditions
• Autoimmune support (lupus, rheumatoid arthritis)
• Immune system support
• Parasitic infections
• Cancer support (adjunctive, investigational)
• Lyme disease (adjunctive use)
• Digestive inflammation
• Fatigue from chronic illness

• Malaria recurrence (when used as part of artemisinin-combination therapy)
• Drug-resistant malaria progression (combination use reduces resistance development)

Artemisia annua is not meaningfully present in common foods — it is a specialized medicinal herb, not a culinary plant. To support the same biological goals (reducing inflammation, supporting immune balance, and fighting oxidative stress), focus on: (1) Iron-awareness: artemisinin's mechanism involves iron — pairing with moderate iron-containing foods like leafy greens may subtly support its mechanism, while very high iron supplementation alongside artemisinin is best avoided. (2) Bitter greens: arugula, dandelion greens, and radicchio share bitter compounds that support liver detoxification pathways similarly activated by Qing Hao. (3) Anti-inflammatory foods: turmeric, ginger, and fatty fish (omega-3s) complement Qing Hao's inflammation-calming effects. (4) Antioxidant-rich foods: berries, pomegranate, and dark leafy greens support the oxidative balance mechanisms that artemisinin engages. (5) Prebiotic foods: garlic, onion, and leeks support gut immunity, reinforcing Qing Hao's immune-modulating profile. Foods to limit: High-dose iron supplements taken simultaneously (may alter artemisinin's mechanism unpredictably), Grapefruit (may affect metabolism of artemisinin derivatives via CYP enzyme inhibition).

• Nausea or stomach upset (especially on an empty stomach)
• Dizziness or lightheadedness
• Headache
• Mild skin reactions or rash (uncommon)
• Temporary heart rate changes (documented mainly with IV pharmaceutical artemisinin derivatives at high doses)
• Potential neurological effects with very high doses or prolonged use (rare at therapeutic oral doses)
• Liver enzyme elevations with prolonged high-dose use (monitor with extended protocols)
• Not recommended during pregnancy (especially first trimester) due to insufficient safety data

• Recommended daily: Dried herb (tea/decoction): 6–15 g per day of dried Qing Hao leaf in cold or lukewarm water (avoid boiling). Standardized extract (artemisinin content): 100–200 mg artemisinin per day for general immune/anti-inflammatory support. Clinical malaria treatment uses pharmaceutical artemisinin derivatives at specific weight-based doses under medical supervision.
• Best time of day: Can be taken morning and evening with meals; TCM tradition often uses it in two divided doses during the day.
• With or without food: Best taken with food to reduce the chance of nausea and to support absorption of fat-soluble compounds.
• Time to effect: Fever and acute infection: 24–48 hours. Anti-inflammatory and immune support: 2–4 weeks of consistent use.
• How long to take it: For acute conditions (fever, infection): typically 5–14 days. For ongoing anti-inflammatory or immune support: cycles of 4–8 weeks with a 2–4 week break are commonly recommended by integrative practitioners to avoid enzyme induction effects. Not recommended for indefinite continuous use without medical oversight.