Herb and Spice of the Week - Sage

Flowers of Salvia officinalis

Salvia officinalis (sage, also called garden sage, or common sage) is a perennial, evergreen subshrub, with woody stems, grayish leaves, and blue to purplish flowers. It is a member of the family Lamiaceae and is native to the Mediterranean region, though it has naturalized in many places throughout the world. It has a long history of medicinal and culinary use, and in modern times as an ornamental garden plant. The common name "sage" is also used for a number of related and unrelated species.








Cultivars are quite variable in size, leaf and flower color, and foliage pattern, with many variegated leaf types. The Old World type grows to approximately 2 ft (0.61 m) tall and wide, with lavender flowers most common, though they can also be white, pink, or purple. The plant flowers in late spring or summer. The leaves are oblong, ranging in size up to 2.5 in (6.4 cm) long by 1 in (2.5 cm) wide. Leaves are grey-green, rugose on the upper side, and nearly white underneath due to the many short soft hairs. Modern cultivars include leaves with purple, rose, cream, and yellow in many variegated combinations.







Culinary use

Sage leaves

In Britain, sage has for generations been listed as one of the essential herbs, along with parsley, rosemary and thyme (as in the folk song "Scarborough Fair"). It has a savory, slightly peppery flavor. It appears in many European cuisines, notably Italian, Balkan and Middle Eastern cookery. In British and American cooking, it is traditionally served as sage and onion stuffing, an accompaniment to roast turkey or chicken at Christmas or Thanksgiving Day. Other dishes include pork casserole, Sage Derby cheese and Lincolnshire sausages. Despite the common use of traditional and available herbs in French cuisine, sage never found favor there.



Essential oil

Common sage is grown in parts of Europe for distillation of an essential oil, though other species such as Salvia fruticosa may also be harvested and distilled with it. The essential oil contains cineole, borneol, and thujone. Sage leaf contains tannic acid, oleic acid, ursonic acid, ursolic acid, carnosol, carnosic acid, fumaric acid, chlorogenic acid, caffeic acid, niacin, nicotinamide, flavones, flavonoid glycosides, and estrogenic substances.



Traditional medicine

Salvia and "sage" are derived from the Latin salvere (to save), referring to the healing properties long attributed to the various Salvia species. It has been recommended at one time or another for virtually every ailment by various herbals.

In traditional Tamil Siddha medicine, sage (Karpooravalli) is used for respiratory ailments like asthma and alleviating nasal discharge associated with upper respiratory infections. Sage leaves are crushed in boiling water and the fumes are inhaled.

In traditional Austrian medicine, S. officinalis herb has been used internally (as tea or directly chewed) for treatment of disorders of the respiratory tract, mouth, gastrointestinal tract, and skin.

Investigations have taken place into using sage as a treatment for Alzheimer's disease patients. Sage leaf extract may be effective and safe in the treatment of hyperlipidemia.

Health
A number of double-blind, placebo-controlled, randomized, balanced-crossover studies in healthy humans have demonstrated improved memory, attention/executive function, alertness and mood following single doses of cholinesterase-inhibiting sage extracts or essential oils. A single, double-blind, placebo-controlled trial in a small cohort (n = 30) of Alzheimer's disease patients also demonstrated improved cognitive functioning and behavioral function (Clinical Dementia Rating) following a 16-week administration of a Salvia officinalis alcoholic tincture.

According to Peter Rogers' team at Bristol University, researchers have concluded that extracts of sage can enhance cognitive performance. This was contrasted to the similar effect of the caffeine found in tea and coffee.

The seeds of sage\

In favorable conditions in the garden, S. officinalis can grow to a substantial size (1 square metre or more), but a number of cultivars are more compact. As such they are valued as small ornamental flowering shrubs, rather than for their herbal properties. Some provide low ground cover, especially in sunny dry environments. Like many herbs they can be killed by a cold wet winter, especially if the soil is not well drained. But they are easily propagated from summer cuttings, and some cultivars are produced from seeds.

Named cultivars include:

* 'Alba', a white-flowered cultivar
* 'Aurea', golden sage
* 'Berggarten', a cultivar with large leaves, which rarely blooms, extending the useful life of the leaves
* 'Extrakta', has leaves with higher oil concentrations
* 'Icterina', a cultivar with yellow-green variegated leaves
* 'Lavandulaefolia', a small leaved cultivar
* 'Purpurascens' ('Purpurea'), a purple-leafed cultivar
* 'Tricolor', a cultivar with white, yellow and green variegated leaves



Flowers of Salvia officinalis
Sage leaves
The seeds of sage