What is Spicebush?

Spicebush is a woodland shrub of eastern North America. Its twigs, leaves and red berries smell strongly of spice. Folk healers made tea from the twigs, and cooks dried the berries as a pepper-like seasoning.

In American folk and Eclectic practice it was mainly a fever and cold remedy. It was also taken for upset stomach and as a spring "blood" tonic. Traditional use is not proof that a remedy works, and it is not proof that it is safe.

Here is the honest verdict. There are no human trials of spicebush that we can point to. So no one can say it treats any illness.

It is still widely used as a wild food and a pleasant tea. That is a fair reason to try it. Treating a real illness with it is not.

How does Spicebush work?

No one has shown how spicebush acts in the human body.

The old idea was that hot spicebush tea "drove out" a fever by making you sweat. Any hot drink can warm you and make you sweat. That is the drink's heat, not proof of a plant effect.

Most modern work is lab work on the plant's volatile oil. In dish tests, the oil slows the growth of some bacteria and fungi. Whether that happens inside a person who drinks the tea is not known.

In test-tube work, the oil also mops up free radicals, a common antioxidant measure. Such results are very easy to get and often mean little for health.

There is also animal and field work on spicebush oil as an insect repellent. That says nothing about taking it by mouth.

So the short answer is that the mechanism is unproven. Treat any "it works by..." claim about spicebush as a guess.

What forms does Spicebush come in?

Spicebush is sold more as a food than as a supplement.

Common forms are:

Dried berries, whole or ground, sold as "wild allspice" for cooking.

Dried twigs or leaves, cut for tea.

Fresh twigs, snapped and steeped by foragers.

Loose herbal tea blends that list spicebush among several herbs.

Less common forms are tinctures, which are alcohol extracts, and bottled essential oil.

The essential oil is for scent and repellent use. It is far stronger than tea and is not a drink.

Standardised capsules are rare. When a product does not state how much plant is in it, you cannot judge the strength.

If you forage, correct plant identification matters. Several shrubs look similar once the leaves are off.

Where it comes from:

Spicebush was a staple of American household medicine in the 1700s and 1800s.

Several Native American nations used the twigs, bark and berries in teas and washes. Settlers took up the plant and called it fever bush. The name reflects the main use, which was hot tea during colds and fevers.

Eclectic physicians of the 1800s listed it in their materia medica. They described it as a warming, sweat-promoting remedy. They also used it for gas, worms and sluggish digestion.

During the Civil War, blockades cut off imported spices and drugs. Spicebush berries stood in for allspice, and the tea stood in for pricier febrifuges, which were fever drugs of the day.

It faded from medical use as modern drugs arrived. It stayed on as a forager's tea and seasoning, which is its main role today.

These records show what people did. They do not show that it worked.

What does Spicebush help with?

• Fevers and common colds: This is the classic use, and it is the source of the name fever bush. Tradition held that the hot tea brought on a sweat and broke the fever. No trial has tested spicebush in people with fever or colds. Warm fluids do soothe a sore throat and loosen mucus a little. That comfort comes from the heat and the water. Spicebush is not a treatment for fever. A high or lasting fever needs a doctor, not tea.
• Coughs and chest congestion: Folk use included steam and hot tea for a stuffy chest. The strong aroma was thought to open the airways. There is no human evidence here. Aromatic steam can make breathing feel easier for a short time. That effect is mild and short-lived. Do not use it for breathing trouble, wheeze or a cough lasting more than three weeks. Those need medical review.
• Gas, bloating and upset stomach: Eclectic writers called spicebush a carminative, meaning a herb that eases gas. Aromatic plants in general have that reputation. No study has tested spicebush for digestive symptoms in people. Warm spiced drinks can feel settling after a meal, which is a real but small comfort. If stomach pain is severe, repeated or comes with weight loss or blood, see a doctor.
• Intestinal worms (historic claim): Older sources list spicebush as a vermifuge, a remedy meant to expel worms. There is no evidence that it clears worm infections in people. Lab work on the oil does not fill that gap. Worm infections are diagnosed with a stool test and treated with specific drugs that work well. Do not try to self-treat them.
• Aches and rheumatic pain (historic claim): Bark and twig preparations were rubbed on or drunk for joint and muscle pain. No human study supports this. Any warmth or rub can distract from pain for a while, whatever is in it. Ongoing joint pain and swelling deserve a proper diagnosis.
• Itchy skin, as a wash (historic claim): Cooled tea was used as a wash for rashes, bites and itching. There is no trial evidence for this use. Plant washes can also cause rashes in people who react to the plant. Stop at once if the skin gets redder, sore or more itchy.
• Culinary spice and flavouring: This use needs no medical claim, and it is the best-supported one. Dried, ground spicebush berries taste close to allspice with a citrus edge. Cooks have used them that way for centuries. Food amounts are small and widely eaten without trouble. That is not the same as a daily medicinal dose.

Which foods are rich in Spicebush?

Spicebush is not a nutrient, so no food is "rich in it". The dried berries are themselves a food, used as a wild stand-in for allspice. Culinary amounts are small.

What are the side effects of Spicebush?

• Nausea or stomach upset, mainly from strong tea
• Heartburn from the spicy, aromatic taste
• Mouth or throat irritation
• Allergic rash or itching from skin washes
• Loose stools in some people
• Rare allergic reaction with swelling or trouble breathing

Good to know:

Spicebush has a long record of use as a food spice without obvious harm.

That said, side effects have never been tracked in a study. What we have is kitchen and foraging experience, not safety data.

Most reported problems are mild and stomach-related, and they settle when you stop. Allergic reactions are rare but possible, as with any plant.

The real risk sits with concentrated products. Essential oil and strong extracts are a different thing from tea and are not safe to swallow.

How much Spicebush should you take?

• Recommended daily: There is no established dose for spicebush, because it has not been studied in people. Tea labels and foraging guides commonly describe about one teaspoon of dried twig or leaf steeped in a cup of hot water, once or twice a day. Culinary use is a pinch to a quarter teaspoon of ground berry in a dish. Those are the amounts products carry. They are not advice for you, and they are not tested doses. Do not swallow the essential oil at any amount. Concentrated oils from aromatic laurel-family plants can be far more harmful than the tea.
• Best time of day: Timing does not matter much for a food-strength tea. Tradition favoured a hot cup in the evening, so the drinker could sweat under blankets. That is habit, not science. If the spice feels harsh on your stomach, a daytime cup with food is gentler.
• With or without food: Either is fine for culinary amounts. Strong tea on an empty stomach can feel sharp or cause mild nausea. Having it with or after food usually helps. If it still upsets your stomach, stop using it.
• Time to effect: Any comfort from a hot cup comes within minutes. That is the heat and steam more than the plant. For the traditional claims, such as fever, worms or joint pain, there is no known time to effect. It may well do nothing at all. Do not keep waiting on it while a real illness gets worse.
• How long to take it: Traditional use was short, during a cold or an upset stomach, over a few days. No one has studied what long daily use does. There is no safety record for taking it for weeks or months. If you are using it for a symptom and nothing changes within about a week, it is not working. Carrying on will not fix that.