Is Anise Oil Good for Sleep? What Research Covers

Anise smells like a sweet, warm candy shop, and a smell like that makes people wonder whether it might also be a bedtime scent. It is a fair question, and the research that exists is narrower than the folklore. Here is what has actually been studied, and how we think about a bottle of anise on the nightstand.

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Where anise and mood research really comes from

The closest human studies are about swallowed products, not scent. One trial gave anise oil capsules to people with irritable bowel syndrome who also had mild to moderate depression scores, and compared them with a placebo and an active comparator (Mosaffa-Jahromi and colleagues). A later trial gave a capsule containing lemon balm, anise and damask rose to people with constipation-predominant irritable bowel syndrome and measured anxiety and depression scores (Azimi and colleagues).

Both were about a bowel condition, both used capsules, and neither one asked how well anyone slept after smelling anise. The second also mixes three plants, so it cannot say what anise contributed. These are interesting leads for researchers. They are not a description of what a diffuser does in a bedroom.

What the lab work on anethole adds

Anethole is the molecule that gives anise most of its character. A 2025 review of the laboratory literature, Khodadadian and Balali-Dehkordi, gathers animal and cell studies on how it interacts with the nervous system. That is early-stage science. Experiments on mice tell researchers where to look next; they do not tell you what happens when a person breathes a lightly scented room.

What we do know about scent and sleep in general

Scent and sleep have been studied, mostly with other plants. A 2024 meta-analysis of randomized trials in older adults reported better sleep scores with aromatherapy overall, and the strongest signal came from lavender used on its own (Xu and colleagues). The lesson there is about lavender, not about every oil. Results from one plant do not carry over to another, which is why we do not borrow them for anise.

How we would think about it

We sell our Anise Essential Oil as an aromatic and cosmetic oil, for the scent itself: sweet, warm and licorice-like, with a faint spiced edge. If you love that smell, that is a perfectly good reason to enjoy it, and our holiday diffuser blends show where it shines. We just would not buy it as a sleep product, because nobody has shown it works as one, and we would rather say that plainly than hint at it.

A bedroom is also a small, closed space, so a few habits are worth having if you do scent it:

Keep sessions short and let fresh air in, since a closed room concentrates whatever you diffuse.
Think about the animals that share your room. Pet Poison Helpline notes that cats lack a liver enzyme that other animals use to clear many oils, and that active diffusers can leave microdroplets that settle on fur (Essential Oils and Cats). Birds and small pets are best kept well away from it too.
Keep the bottle capped and out of reach of children. European herbal regulators advise that exposure to anise preparations be minimised for young children and for pregnant and breastfeeding women (EMA assessment report); our posts on pregnancy and breastfeeding and children go through it.

What a nightstand scent can honestly be

Some scents are simply nice to have around, and that counts for something. Anise is a bold one. Where some oils are soft and floral, anise is sweet, warm and unmistakably licorice, with a faint spiced edge, so it is not a quiet background note. Open the bottle and smell it at arm's length first. If it makes you think of candy and a holiday kitchen, it may suit an afternoon diffuser better than a bedroom.

Pairing ideas for the daytime

In a diffuser, anise sits comfortably with sweet orange, clove bud, cinnamon leaf, cardamom and ginger, which gives you a cozy, spiced blend. Start with a few drops of orange and the smallest touch of anise, so the licorice does not take over. Run it for a short session in a living room or kitchen with the door open to the rest of the house, and see how you feel about the smell after an hour.

If sleep is the real problem

Trouble sleeping that lasts weeks deserves a conversation with a doctor or pharmacist, who can look at causes that no scent addresses. That is the one piece of advice we would put ahead of any bottle we sell. For the wider picture on what anise research does and does not cover, see our anise research overview, and for everyday handling, our safety basics.