Sea buckthorn oil is a red–orange oil derived from

sea buckthorn ''Hippophae'' is the genus of sea buckthorns, deciduous shrubs in the family Elaeagnaceae. The name sea buckthorn may be hyphenated to avoid confusion with the unrelated true buckthorns (''Rhamnus'', family Rhamnaceae). It is also referred to a ...

plants. The most commonly used species for this purpose is '' Hippophae rhamnoides''. Species belonging to this genus accumulate lipids in the

mesocarp Fruit anatomy is the plant anatomy of the internal structure of fruit. Fruits are the mature ovary or ovaries of one or more flowers. They are found in three main anatomical categories: aggregate fruits, multiple fruits, and simple fruits. A ...

(the fruit pulp), so the oil can be extracted from either the seeds or the pulp. The resulting oils (seed oil and pulp oil, also called fruit or berry oil) are used in

dietary supplements A dietary supplement is a manufactured product intended to supplement one's diet by taking a pill, capsule, tablet, powder, or liquid. A supplement can provide nutrients either extracted from food sources or that are synthetic in order ...

nutraceuticals A nutraceutical or bioceutical is a pharmaceutical alternative which claims physiological benefits. In the US, "nutraceuticals" are largely unregulated, as they exist in the same category as dietary supplements and food additives by the FDA, un ...

cosmetics Cosmetics are constituted mixtures of chemical compounds derived from either natural sources, or synthetically created ones. Cosmetics have various purposes. Those designed for personal care and skin care can be used to cleanse or protec ...

and skin care products.

Chemical constituents

Oil content in seeds of sea buckthorn is on average 7-11 % while oil content of the fruit pulp is around 1.5-3 % (per fresh weight). Seed oil is characterized by high contents of

polyunsaturated fatty acid Polyunsaturated fatty acids (PUFAs) are fatty acids that contain more than one double bond in their backbone. This class includes many important compounds, such as essential fatty acids and those that give drying oils their characteristic proper ...

s while pulp oil contains monounsaturated fatty acids and

carotenoid Carotenoids (), also called tetraterpenoids, are yellow, orange, and red organic pigments that are produced by plants and algae, as well as several bacteria, and fungi. Carotenoids give the characteristic color to pumpkins, carrots, parsnips, cor ...

s. Both oils also contain dense amounts of tocopherols, tocotrienols and plant sterols.

Fatty acids

Oils from sea buckthorn seeds and pulp differ considerably in

fatty acid In chemistry, particularly in biochemistry, a fatty acid is a carboxylic acid with an aliphatic chain, which is either saturated or unsaturated. Most naturally occurring fatty acids have an unbranched chain of an even number of carbon atoms, ...

composition. While

linoleic acid Linoleic acid (LA) is an organic compound with the formula COOH(CH2)7CH=CHCH2CH=CH(CH2)4CH3. Both alkene groups are ''cis''. It is a fatty acid sometimes denoted 18:2 (n-6) or 18:2 ''cis''-9,12. A linoleate is a salt or ester of this acid. L ...

and

α-linolenic acid ''alpha''-Linolenic acid (ALA), also known as α-Linolenic acid (from Greek ''alpha'' meaning "first" and ''linon'' meaning flax), is an ''n''−3, or omega-3, essential fatty acid. ALA is found in many seeds and oils, including flaxseed, waln ...

are the major fatty acids in seed oil, sea buckthorn pulp oil contains approximately 65% combined of the monounsaturated

, palmitoleic acid, and the saturated fatty acid,

palmitic acid Palmitic acid (hexadecanoic acid in IUPAC nomenclature) is a fatty acid with a 16-carbon chain. It is the most common saturated fatty acid found in animals, plants and microorganisms.Gunstone, F. D., John L. Harwood, and Albert J. Dijkstra. The ...

. This results in a major difference between the sea buckthorn oil extracted from seeds and the sea buckthorn oil extracted from the fleshy part of the fruit, in term of appearance and consistency. Sea buckthorn fruit oil is dark orange in color and has a thick consistency (it is liquid at room temperature, but becomes much thicker if refrigerated), whereas the seed oil is pale yellow and does not solidify under refrigeration. Few other

vegetable oils Vegetable oils, or vegetable fats, are oils extracted from seeds or from other parts of fruits. Like animal fats, vegetable fats are ''mixtures'' of triglycerides. Soybean oil, grape seed oil, and cocoa butter are examples of seed oils, o ...

contain a similar quantity of these fatty acids. The high proportion of unsaturated fatty acids are also responsible for the relatively poor

shelf life Shelf life is the length of time that a commodity may be stored without becoming unfit for use, consumption, or sale. In other words, it might refer to whether a commodity should no longer be on a pantry shelf (unfit for use), or no longer on a ...

, as they cause sea buckthorn oil to turn rancid quickly.

Tocopherols and tocotrienols

α-Tocopherol α-Tocopherol is a type of vitamin E. It has E number "E307". Vitamin E exists in eight different forms, four tocopherols and four tocotrienols. All feature a chromane ring, with a hydroxyl group that can donate a hydrogen atom to reduce free r ...

is the major

vitamin E Vitamin E is a group of eight fat soluble compounds that include four tocopherols and four tocotrienols. Vitamin E deficiency, which is rare and usually due to an underlying problem with digesting dietary fat rather than from a diet low in vitami ...

compound in sea buckthorn. Seed oil also contains considerable amounts of gamma-tocopherol. The total amount of

tocopherol Tocopherols (; TCP) are a class of organic chemical compounds (more precisely, various methylated phenols), many of which have vitamin E activity. Because the vitamin activity was first identified in 1936 from a dietary fertility factor in rat ...

s and

tocotrienol The vitamin E family comprise four tocotrienols (alpha, beta, gamma, delta) and four tocopherols (alpha, beta, gamma, delta). The critical chemical structural difference between tocotrienols and tocopherols is that tocotrienols have unsaturated is ...

s is roughly 64–300 mg/100 g in seed oil and 100–481 mg/100 g in pulp oil.

Carotenoids

As carotenoids are the pigments that give sea buckthorn berry its distinctive orange-red color, these compounds are present in considerable amounts both in pulp oil and in seed oil; the average carotenoid content of pulp oil is 350 mg per 100 grams, as compared to 67.5 mg per 100 grams in seed oil. The total content of carotenoids in pulp oil varies (300–2000 mg/100 g) greatly between different growth locations and subspecies, and between components, where total carotenoids were up to 85 mg/100 g in seed oil, and up to 1000 mg/100 g in pulp oil. In general, the main

s present in pulp oil are beta-carotene,

zeaxanthin Zeaxanthin is one of the most common carotenoids in nature, and is used in the xanthophyll cycle. Synthesized in plants and some micro-organisms, it is the pigment that gives paprika (made from bell peppers), corn, saffron, goji (wolfberries), ...

and

lycopene Lycopene is an organic compound classified as a tetraterpene and a carotene. Lycopene (from the neo-Latin '' Lycopersicum'', the tomato species) is a bright red carotenoid hydrocarbon found in tomatoes and other red fruits and vegetables. Occ ...

Plant sterols

Both seed and pulp oil also contain considerable amounts of plant sterols (12-23 g/kg and 10-29 g/kg of oil, respectively).

Beta-sitosterol β-sitosterol (beta-sitosterol) is one of several phytosterols (plant sterols) with chemical structures similar to that of cholesterol. It is a white, waxy powder with a characteristic odor, and is one of the components of the food additive E ...

is the major

sterol Sterol is an organic compound with formula , whose molecule is derived from that of gonane by replacement of a hydrogen atom in position 3 by a hydroxyl group. It is therefore an alcohol of gonane. More generally, any compounds that contain the g ...

compound throughout the berry which constitutes 57-83% of total sterols.

Uses

Sea buckthorn oil is frequently used in cosmetic products, especially topical products marketed for aging skin and

dry skin Xeroderma, xerosis or xerosis cutis, or simply dry skin, is a skin condition characterized by excessively dry skin. The medical term ''xeroderma'', meaning "dry skin", derives from modern Latin, ''xero-'' 'dry' + Greek ''derma'' 'skin'. In most ...

. Sea buckthorn oil is used in some

shampoos Shampoo () is a hair care product, typically in the form of a viscous liquid, that is used for cleaning hair. Less commonly, shampoo is available in solid bar format. Shampoo is used by applying it to wet hair, massaging the product into the ...

and other hair care products. It has sometimes been used as a type of

topical medication A topical medication is a medication that is applied to a particular place on or in the body. Most often topical medication means application to body surfaces such as the skin or mucous membranes to treat ailments via a large range of classes ...

for

skin disorder A skin condition, also known as cutaneous condition, is any medical condition that affects the integumentary system—the organ system that encloses the body and includes skin, nails, and related muscle and glands. The major function of this s ...

s, although there is no high-quality research proving effectiveness or safety of any such uses. Taking sea buckthorn oil as a

dietary supplement A dietary supplement is a manufactured product intended to supplement one's diet by taking a pill, capsule, tablet, powder, or liquid. A supplement can provide nutrients either extracted from food sources or that are synthetic in orde ...

does not help with

eczema Dermatitis is inflammation of the skin, typically characterized by itchiness, redness and a rash. In cases of short duration, there may be small blisters, while in long-term cases the skin may become thickened. The area of skin involved can v ...

. It has been used in Asian and Russian

traditional medicine Traditional medicine (also known as indigenous medicine or folk medicine) comprises medical aspects of traditional knowledge that developed over generations within the folk beliefs of various societies, including indigenous peoples, before th ...

for centuries. In a few East Asian countries, the fruit pulp oil is put on

skin burns A burn is an injury to skin, or other tissues, caused by heat, cold, electricity, chemicals, friction, or ultraviolet radiation (like sunburn). Most burns are due to heat from hot liquids (called scalding), solids, or fire. Burns occur main ...

Research directions

Preliminary research on sea buckthorn oil has been conducted for its potential biological properties, but there is no high-quality evidence as of 2018 that it has any confirmed benefits. Sea buckthorn oil is under preliminary research for its possible effects on

blood pressure Blood pressure (BP) is the pressure of circulating blood against the walls of blood vessels. Most of this pressure results from the heart pumping blood through the circulatory system. When used without qualification, the term "blood pressur ...

cholesterol Cholesterol is any of a class of certain organic molecules called lipids. It is a sterol (or modified steroid), a type of lipid. Cholesterol is biosynthesized by all animal cells and is an essential structural component of animal cell membr ...

, and blood

triglycerides A triglyceride (TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids (from ''tri-'' and '' glyceride''). Triglycerides are the main constituents of body fat in humans and other vertebrates, as ...

, and for its use by oral intake to improve

antioxidant Antioxidants are compounds that inhibit oxidation, a chemical reaction that can produce free radicals. This can lead to polymerization and other chain reactions. They are frequently added to industrial products, such as fuels and lubricants ...

status by increasing blood levels of beta-carotene and vitamin E.

References

{{DEFAULTSORT:Sea Buckthorn Oil Vegetable oils Hippophae Fruit