Star Anise (Chakra Phool)
The spice that supplies 90% of the world's shikimic acid — the precursor to Tamiflu. And a potent digestive aid in its own right.
TLDR — Star Anise
- Star anise (*Illicium verum*) provides 90%+ of the world supply of shikimic acid — the chemical precursor to oseltamivir (Tamiflu)
- During the 2005 H5N1 bird flu pandemic, star anise prices increased 1200% due to Tamiflu production demand
- Star anise contains trans-anethole (80–90% of essential oil) — the same digestive compound as fennel, but more concentrated
- Star anise has the highest antifungal activity of common culinary spices against Candida species
- Japanese star anise (*Illicium anisatum*) is TOXIC — visually similar but contains neurotoxins; only Chinese star anise is safe
- Used in Chinese 5-spice powder, pho broth, biryani, and Indian garam masala
The Tamiflu Connection — Why Star Anise Matters Globally
In 2005, during the H5N1 avian influenza pandemic, global demand for oseltamivir (Tamiflu — the primary antiviral against influenza) exceeded supply. The reason: shikimic acid — the key starting material for Tamiflu synthesis — came almost exclusively from star anise. Star anise contains 6–8% shikimic acid by dry weight.
This connection made star anise strategically important at the geopolitical level:
- China (the primary grower of star anise) temporarily controlled world antiviral supply
- Pharmaceutical companies began exploring alternate shikimic acid sources (e. coli fermentation)
- Star anise prices surged from approximately $15/kg to $200/kg in 2005
Does eating star anise prevent flu? No — you cannot extract meaningful amounts of shikimic acid from dietary star anise, and shikimic acid itself is not the antiviral (it is a chemical precursor that requires multiple synthesis steps to become Tamiflu). However, trans-anethole in star anise does have antimicrobial properties.
Nutritional Profile
Star Anise — Nutrition Facts (per 100g)
Per 100g whole star anise
| Nutrient | Amount | % Daily Value |
|---|---|---|
| Energy | 337 kcal | — |
| Protein | 17.6 g | — |
| Total Fat | 15.9 g | — |
| Carbohydrates | 50.0 g | — |
| Dietary Fibre | 14.6 g | 52% |
| Iron | 36.96 mg | 205% |
| Calcium | 646 mg | 65% |
| Shikimic acid | ~6–8% g (of dry weight) | — |
| Trans-anethole | 80–90% of ~5–10% essential oil | — |
Health Benefits
1. Digestive Trans-anethole relaxes gastrointestinal smooth muscle — same mechanism as fennel seeds. Star anise is used in digestive teas and post-meal preparations across South and East Asia.
2. Antimicrobial and antifungal Star anise extract has the broadest antifungal activity of common culinary spices — inhibits Candida albicans, C. tropicalis, and Aspergillus species. Trans-anethole and other phenylpropanoids are responsible.
3. Antioxidant High phenolic content gives strong free radical scavenging activity.
4. Estrogenic (weak) Like fennel anethole, star anise anethole has weak oestrogenic activity. Used traditionally for menstrual regulation.
Safety Warning — Japanese vs Chinese Star Anise
This is a life-safety distinction:
Chinese star anise (Illicium verum) — the culinary spice. Safe. This is the only one used in cooking.
Japanese star anise (Illicium anisatum) — TOXIC. Contains anisatin, a GABA receptor antagonist that causes seizures, respiratory failure, and death. It looks nearly identical to Chinese star anise.
Japanese star anise has been accidentally included in herbal teas and supplements. The European Food Safety Authority has issued warnings. If purchasing star anise for purposes other than whole spice cooking, verify the species. Reputable spice suppliers only carry I. verum.
Home Test: Quality and Safety Check for Star Anise
Steps
- 1 Examine the star shape — genuine star anise (*I. verum*) has 8 uniform points
- 2 Break off one point and smell the inside directly
- 3 The interior seed and pod inner surface should both be fragrant
Pure / Pass
8-pointed star with uniform, symmetrical points. Strong, sweet, anise-liquorice aroma immediately on breaking open. Reddish-brown colour inside.
Adulterated / Fail
Japanese star anise tends to have more than 8 points (often irregular), is smaller, and has a different aroma — more bitter/camphor rather than sweet anise. If you detect an unusual smell or irregular star, do not consume and verify source.
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Frequently Asked Questions
Q Can star anise cure or prevent flu?
Can star anise cure or prevent flu?
No. While star anise contains shikimic acid (the Tamiflu precursor), dietary consumption does not provide meaningful antiviral activity. Tamiflu requires complex pharmaceutical synthesis from shikimic acid. Star anise has antimicrobial properties against bacteria and fungi, but is not an influenza treatment.
Q How is star anise used in Indian cooking?
How is star anise used in Indian cooking?
Star anise is used in biryani (3–4 whole stars per pot), garam masala blends, and some South Indian spice mixes. It pairs with cardamom, cinnamon, and cloves in warming spice combinations. Use sparingly — its flavour is potent and can overwhelm dishes.
Q Is star anise the same as anise seeds?
Is star anise the same as anise seeds?
No — anise seeds (*Pimpinella anisum*) and star anise (*Illicium verum*) are completely different plants that happen to contain the same primary flavour compound (trans-anethole), giving them similar anise-liquorice taste. They are not interchangeable in all recipes as concentrations and secondary flavours differ.
Q Can I use star anise in tea?
Can I use star anise in tea?
Yes — 1–2 whole stars boiled in water makes a digestive and warming tea. Traditional Indian kashaya and chai sometimes include star anise. Avoid very large quantities (>5 stars per cup) as the essential oil at high doses may cause nausea.
Available at Organic Mandya
Organic Star Anise (Chakra Phool)
Organic Chinese star anise (*I. verum*). Species-verified. Lab tested.
Last updated: March 2026
Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or a qualified healthcare provider before making dietary changes, especially if you have a medical condition.