Elm bark is obtained from the common elm, Ulmus campestris, Linn. (N.O. Urticaceae), freed from the dark, outer portion. It occurs in rather thick, flattened pieces, usually 10 to 15 centimetres long and 2.5 to 5 centimetres wide, consisting of secondary bast. The outer surface is pale, yellowish-brown, marked with patches of the dark brown, outer portion; inner surface longitudinally striated. Fracture, rather tough and short, but not very fibrous. The bark is odourless, but has a slightly mucilaginous and astringent taste.

Constituents.—The chief constituent of elm bark is tannin; it also contains starch and a little mucilage.

Action, Medical Uses, and Dosage.—Elm bark is nutritive, expectorant, diuretic, demulcent, and emollient, and is a very valuable remedial agent. In mucous inflammations of the lungs, bowels, stomach, bladder, or kidneys, used freely in the form of a mucilaginous drink (1 ounce of the powdered bark to 1 pint of water), it is highly beneficial, as well as in diarrhoea, dysentery, coughs, pleurisy, strangury, and sore throat, in all of which it tends powerfully to allay the inflammation. A tablespoonful of the powder boiled in a pint of new milk, affords a nourishing diet for infants weaned from the breast, preventing the bowel complaints to which they are subject, and rendering them fat and healthy. Some physicians consider the constant use of it, during and after the seventh month of gestation, as advantageous in facilitating and causing an easy delivery; 1/2 pint of the infusion to be drank daily. Elm bark has likewise been successfully employed externally in cutaneous diseases, especially in obstinate cases of herpetic and syphilitic eruptions, and certainly possesses more efficient virtues than are commonly supposed. As an emollient poultice, the bark has been found very serviceable when applied to inflamed parts, suppurating tumors, fresh wounds, burns, scalds, bruises, and ulcers; and in the excruciating pains of the testes, which accompany the metastasis of mumps, whether of recent or long standing, the constant use of an elm poultice, regularly changed every 4 hours, will be found a superior remedy. Notwithstanding its general value as an application to ulcers, it will often be found injurious, especially when used as a cataplasm to ulcers of the limbs, rendering the ulcer more irritable and difficult to heal, and frequently converting a simple sore, which might be cured by astringent or other washes, into an almost intractable ulcer; much care is, therefore, required in the application of this bark externally. As an injection, the infusion will prove useful in diarrhoea, dysentery, tenesmus, and hemorrhoids, also in gonorrhoea and gleet. The powder, sprinkled on the surface of the body, will prevent and heal excoriations and chafings, and allay the itching and heat of erysipelas. As the bark increases in bulk by imbibing moisture, it has been recommended to form bougies and tents of it for the dilatation of strictures, fistulas, etc., but in urethral strictures it has proved troublesome, from the liability of the part behind the stricture breaking off in the attempt to withdraw it, and passing into the bladder. The infusion of the bark is the common form of administration, and may be drank ad libitum (J. King). (See Mucilago Ulmi.)

History and Description.—The slippery-elm is a large tree, common to this country, especially in the western states. It grows in woods and low grounds, along fences, and in rich, dry, or moist soils, flowering in April. The official part is the inner bark, which is generally separated from the tree in long strips. 

Rinse the herbs with cold running water; then soak it for 30min. Water : Herbs (3L : 100g) 
Bring to a boil, lower the hear and simmer for a further 2hours. 
Keep refridgerated and take 1cup 3times daily.(hot or cold)

Advice to consumers
Some individuals may have adverse reactions to certain plants, herbs, and other natural products. 
Just because something is natural does not mean it is safe for everyone. 
On any issue where no specific advice is given to consumers please follow this general advice if you are currently taking the product:

you are advised to discontinue use and consult your pharmacist or herbal medical doctor. 
when speaking to your doctor of pharmacist you may find it helpful to take a copy of this MHRA advice about the product with you
you should continue to take any medication prescribed by your doctor.

Frequently Asked Questions

Q: How much water should I boil with how much tea/herb?

Q: How do you calculate how much time you should boil water with tea/herb?

Q: Do you sell other tea/herbs not listed on the site?

Q: Can you mix household tea/herbs with leafnflower's tea/herbs?