Andrographis is a leafy plant that grows across India, China, and Southeast Asia and has been a cornerstone of Ayurvedic and Traditional Chinese Medicine for well over a thousand years. Its nickname 'King of Bitters' tells you everything about its taste — it is one of the most intensely bitter plants in herbal medicine. The leaves and stems are the medicinal parts, packed with powerful compounds that have made it one of the most researched herbs for immune health.

The star compound, andrographolide, acts like a natural immune booster — it ramps up the activity of immune cells that hunt down viruses and bacteria, helping your body respond faster and more forcefully to infection. It also helps dial down excessive inflammation, so you feel better sooner without the prolonged misery of a full-blown immune response. Some research suggests it may block viruses from attaching to cells in the first place, which could help prevent infections from taking hold.

Standardized capsule or tablet extracts (standardized to andrographolide content) are the most practical and reliable form for clinical use. Tinctures work well for those who want faster absorption. Dried powder and tea are traditional but harder to dose accurately and the bitterness makes them challenging to take consistently.

• Cold and flu
• Upper respiratory infections
• Sore throat and tonsillitis
• Sinus infections
• Weak immune system
• Inflammation and joint pain
• Digestive infections and diarrhea
• Fatigue from illness
• High blood sugar (type 2 diabetes support)
• Liver health

• Recurring upper respiratory infections (used seasonally as prevention)
• Cold and flu complications when taken at first sign of symptoms

Andrographis is not found in any common food — it is a specialized medicinal herb that must be taken as a supplement. To support your immune system through the same pathways, focus on garlic (natural antimicrobial and immune activator), ginger (reduces inflammation and supports respiratory health), turmeric (powerful anti-inflammatory), dark leafy greens like spinach and kale (rich in immune-supporting vitamins A and C), and fermented foods like yogurt and kefir (strengthen gut immunity). During illness, bone broth and warm vegetable soups also support recovery by reducing inflammation and keeping you hydrated. Avoid sugar and processed foods when fighting an infection — they suppress immune cell activity.

• Digestive upset, nausea, or stomach discomfort (most common)
• Bitter taste (can be strong even in capsule form)
• Headache (reported in some users at higher doses)
• Fatigue or mild dizziness (uncommon)
• Allergic reactions including skin rash (rare)
• Elevated liver enzymes at very high doses (rare, reversible)

• Recommended daily: 300-400 mg of standardized extract (standardized to 4-6% andrographolide) taken 3 times daily during acute illness, totaling 900-1200 mg/day. For general immune support or prevention, 200-300 mg once or twice daily is sufficient. The widely-studied Kan Jang combination uses 200 mg andrographis extract per tablet, typically 4-6 tablets daily during illness.
• Best time of day: Divide doses throughout the day (morning, midday, evening) to maintain steady levels during active illness. For prevention, once or twice daily with meals is fine.
• With or without food: Take with food to minimize the risk of digestive upset and to slightly improve absorption.
• Time to effect: Acute cold/flu relief: noticeable improvement within 2-4 days. Immune and anti-inflammatory benefits for chronic conditions: 4-8 weeks of consistent use.
• How long to take it: For acute illness: take for 5-10 days or until symptoms resolve. For seasonal prevention or immune support: use for up to 8-12 weeks, then take a 4-week break before resuming. Not recommended for continuous long-term use beyond 3 months without medical guidance.