Comfrey has toxic substances that can cause severe liver damage and even death. You should never take comfrey by mouth. The toxic substances in comfrey can be absorbed by the skin. Even creams and ointments should be used for only a short time, and only under a doctor’s supervision.

Why is comfrey toxic?

When taken by mouth: Comfrey is LIKELY UNSAFE for anyone when taken by mouth. It contains chemicals (pyrrolizidine alkaloids, PAs) that can cause liver damage, lung damage, and cancer. The FDA has recommended that all oral comfrey products be removed from the market.

Is comfrey poisonous to dogs?

The Merck Veterinary Manual lists comfrey as an especially risky herb because of its pyrrolizidine alkaloids, which have been linked to liver damage. The alkaloids are actually produced by the herb to fend off bugs, but the insecticide can be harmful to a dog.

What is the herb comfrey used for?

Comfrey is an herbal supplement used for conditions such as bronchitis, bruises (topical use), cancer, cough (persistent), fractures (topical use), peptic ulcer, rheumatism, skin ulcers (topical use), sprains (topical use), wound healing (topical use), gastritis, ulcers, excessive menstrual flow, and to gargle for gum

Is comfrey safe to take internally?

Comfrey is not recommended for internal use because of the liver damage caused by its pyrrolizidine alkaloids. Patients with hypersensitivity or allergic reactions to the plant should also avoid external use.

Is comfrey poisonous to livestock?

Livestock Feed. You wouldn’t think animals would not like to eat comfrey because of the tiny hairs on comfrey leaves, but sheep, pigs and chickens don’t mind. Even rabbits and cattle will eat comfrey when it’s wilted or dried as hay, according to the University of Minnesota Agricultural Experiment Station.

Can you eat comfrey?

Today, eating or taking any form of comfrey by mouth isn’t recommended. It’s considered unsafe, due to the pyrrolizidine alkaloids that comfrey contains. These are dangerous chemicals that can cause cancer, severe liver damage, and even death when you consume them.

Why do dogs eat comfrey?

Comfrey can relieve pain and produce anti-inflammatory properties that can help your dog manage joint pain. Although comfrey also contains pyrrolizidine alkaloids, primarily on the root, which cause liver problems when ingested in large quantities.

Is comfrey poisonous to chickens?

Like the chicken, Comfrey has many beneficial uses. It’s edible, medicinal, is a great nitrogen source for the compost pile, and it’s a low fiber, high protein feed for chickens and other livestock.

Is comfrey poisonous to horses?

What can I do with it and can I overdose my horse with too much? A. Comfrey is common in this country and tends to thrive in damp areas. When fed in excess comfrey can become toxic due to the presence of pyrrolizidine alkaloids, which are also present in ragwort.

What is comfrey good for in the garden?

Use as a mulch. Chop up comfrey leaves with grass cuttings, and place a 5cm layer on the surface of the soil around all plants. This will slowly rot down to provide nutrients, and act as a mulch to keep in moisture and help control weeds. Add fresh cut leaves to your leaf mould heap.

What can I do with comfrey leaves?

7 Best Uses for Comfrey
Vigorous comfrey plants regrow after greens are harvested for compost or mulch.Garlic is tucked in with a double mulch of chopped comfrey and rotted hay.A comfrey root poultice can speed healing of sprains and bruises.Use dried leaves to make comfrey tea for houseplants.

Which is better comfrey root or leaf?

Comfrey preparations are made from the leaves or other parts of the plant grown above the ground. New leaves tend to have more of the poisonous pyrrolizidine alkaloids than older leaves. Some preparations were also made from the roots, but roots contain up to 16 times the amount of pyrrolizidine alkaloids.

Which comfrey is medicinal?

For over 2,000 years, comfrey root and other parts of the herb have been used to treat a variety of ailments. The plant (Symphytum officinale L) belongs to the family Boraginacea and has been valued in traditional medicine for its anti-inflammatory, analgesic and astringent properties.

Is comfrey poisonous to cattle?

Common comfrey (Symphytum officinale) – along with other members of the borage family which include a number of major weeds in southern Australia – can poison cattle and sheep.

Is comfrey poisonous to cows?

The extensive hairs on comfrey leaves restricts its use as a forage. Fresh leaves are eaten by pigs, sheep, and poultry, but are frequently unpalatable to cattle and rabbits.

Is comfrey good for cattle?

Great for Dairy Animals

Comfrey is especially good for animals you are milking. It gives does, cows and ewes a nutritional boost. You can even dry it and then feed it to your animals in the winter. Some people say it improves milk production and increases the amount of cream in the milk (from the protein probably).