Hawthorn
Hawthorne berries are gathered from the small tree Crataegus laevigata of the family Rosaceae. Also known as Mayblossom and Whitehorn, Hawthorne was known to Dioscorides in the first century AD, but was not widely used until recent times. The edible berries are often made into marmalade, and herbal preparations made from the flowers, fruits, and leaves are very prominent in contemporary European medicine.

Hemoglobin
Component of blood that carries oxygen to body tissue.

Hepatitis
A general term for inflammation of the liver. It can result from infection or exposure to toxins.

Hesperidin
Hesperidin is one of the bioflavonoids, naturally occurring nutrients usually found in association with Vitamin C. Some symptoms originally thought to be due to Vitamin C deficiency such as bruising due to capillary fragility were found in early studies to be relieved by crude vitamin C extract but not by purified Vitamin C. The bioflavonoids, sometimes called Vitamin P, were found to be the essential component in correcting this bruising tendency and improving the permeability and integrity of the capillary lining. These bioflavonoids include Hesperidin, Citrin, Rutin, Flavones, Flavonals, Calechin, and Quercetin.

Histamine
A chemical released by the immune system that acts on various body tissues. It has the effect of constricting the smooth bronchial tube muscles, dilating small blood vessels, allowing fluid to leak from various tissues, and increasing the secretion of stomach acid.

Histidine
Intricately involved in a large number of critical metabolic processes, ranging from the production of red and white blood cells to regulating antibody activity. Histidine also helps to maintain the myelin sheaths, which surround and insulate nerves. In particular, Histidine has been found beneficial for the auditory nerves, and a deficiency of this vital amino acid has been noted in cases of nerve deafness.

Hormones
Powerful substances manufactured by the endocrine glands and carried by the blood to body tissues and organs. Hormones determine growth and structure of many organs and also control may vital body functions.

Hydrochloric acid
A strong, corrosive inorganic acid that is produced in the stomach to aid in digestion.

Hydrolyzed protein
A protein that has already been broken down, usually by enzymes, and is a mixture of free-form, di-peptide, and tri-peptide amino acids.

Hydroxycitric acid (HCA)
Acid found in Garcinia Cambogia that affects fat and carbohydrate metabolism. Studies have shown it reduces the conversion of carbs into body fat. See: Citrimax

Hypercalcemia
The presence of abnormally high amounts of calcium in the blood.

Hypertension
High blood pressure. Generally, hypertension is defined as a regular resting pressure over 140/90.

Hypoallergenic
Having a low capacity for inducing hypersensitive (allergic) reactions.

Hypocalcemia
The presence of abnormally low amounts of calcium in the blood.

Hypoglycemia
A term meaning low blood sugar. It's a set of symptoms that point to irregularities in the way the body handles glucose, the sugar that circulates in the blood. Symptoms of hypoglycemia include sweating, trembling, anxiety, fast heartbeat, headache, hunger, weakness, mental confusion, and on occasion, seizures and coma. However, it occurs rarely because the body has a lot of backup systems preventing it.

Hypotension
Low blood pressure.