Star anise is used primarily as a cooking spice, but it also plays a surprising role in pharmaceutical manufacturing, traditional medicine, and personal care products. Its warm, licorice-like flavor makes it a staple across Asian cuisines, while its chemical compounds have proven valuable well beyond the kitchen.
Cooking With Star Anise
Star anise is one of the defining flavors in Chinese and Vietnamese cooking. It’s a key ingredient in Vietnamese pho, where whole pods simmer in the broth for hours, and in Chinese braised dishes like red-cooked pork. The spice also appears in two of the world’s most widely used spice blends: Chinese five-spice powder and Indian garam masala.
The flavor is intensely sweet and licorice-forward, stronger than regular anise seed. When substituting between the two, use half the amount of star anise to replace anise seed, or double the anise seed when standing in for star anise. Whole pods work like bay leaves: drop one or two into a simmering soup, stew, or curry and remove them before serving. For baked goods, rubs, and spice mixes, grind the pods with a mortar and pestle or buy pre-ground powder.
Beyond savory dishes, star anise adds depth to poached fruit, mulled wine, chai-style teas, and desserts like biscotti. It pairs well with cinnamon, clove, ginger, and citrus. A little goes a long way, so start with a single pod or a quarter teaspoon of ground spice and adjust from there.
A Key Ingredient in Tamiflu
Star anise is the primary natural source of shikimic acid, a compound that serves as the starting material for manufacturing oseltamivir, the antiviral medication sold as Tamiflu. About 30 kilograms of dried Chinese star anise yields roughly 1.1 kilograms of shikimic acid, according to research published in the Journal of Organic Chemistry. Oseltamivir remains the only orally available drug approved for both prevention and treatment of seasonal influenza and H5N1 avian flu. This pharmaceutical connection drove massive demand for star anise during flu pandemic scares in the mid-2000s, though shikimic acid is now also produced through bacterial fermentation.
Traditional and Potential Health Uses
In traditional Chinese medicine, star anise tea has been used for centuries to ease nausea, constipation, bloating, and other digestive complaints. The pods are simply steeped in hot water, sometimes with honey or other herbs. The same tradition uses star anise preparations for respiratory infections.
Lab studies have found that star anise’s main aromatic compound, anethole, is effective against a range of bacteria, yeasts, and fungi. Star anise extracts have shown activity against drug-resistant bacteria including MRSA (methicillin-resistant Staphylococcus aureus) and multidrug-resistant strains of Acinetobacter baumannii. The essential oil has also demonstrated antifungal effects against Candida albicans, a common cause of yeast infections. These are laboratory findings, not proven clinical treatments, but they help explain why star anise has been used medicinally across cultures for so long.
Skincare, Haircare, and Fragrance
Star anise essential oil has natural astringent properties that make it useful in skincare formulations targeting oily or congested skin. In hair care products, it helps remove product buildup and excess oil from the scalp. The oil’s distinctive sweet, warm scent also makes it a popular ingredient in soaps, candles, and perfumes, where it adds a rich licorice note that blends well with other warm aromatics.
How to Store It
Whole star anise pods last up to three years when stored properly, which is remarkably long for a spice. Ground star anise loses its potency much faster, typically within 12 months, because the increased surface area lets it oxidize quickly. Keep either form in an airtight container, away from heat, light, and moisture. A cool, dark pantry is ideal. If your whole pods no longer smell distinctly sweet and licorice-like when you snap one open, they’ve faded and should be replaced.
Avoiding Toxic Japanese Star Anise
Chinese star anise (Illicium verum) is the safe, edible species. Japanese star anise (Illicium anisatum) looks similar but contains anisatin, a neurotoxin that can cause seizures. The two have been confused in commercial supply chains, so knowing how to tell them apart matters. Chinese star anise typically has eight uniform, symmetrical points and a rich reddish-brown color. Japanese star anise pods tend to look duller or lighter, with irregular or misshapen points. The smell is the easiest test: genuine Chinese star anise has an unmistakably sweet, licorice-like aroma, while the Japanese variety smells harsher and more camphor-like. Buying from reputable spice vendors is the simplest way to avoid the wrong species entirely.