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In the case of suspected vitamin A deficiency, it is recommended to take it in a daily dose of 10,000 IU (one capsule) for no longer than 2 months. This dose effectively makes up the deficiency and, among others, improves the eyesight and has a beneficial effect on the condition of the skin. The formula contains also vitamin D. The vitamins in the supplement act synergistically and supports the overall body function.
Both vitamin A and vitamin D are fat-soluble compounds. It is thus recommended to take them with a fat-containing meal.
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Vitamin A (retinol) is present in foods of animal origin (fish of the sea, fish, eels, liver, pork and beef, eggs, butter). In the plant products it is present as provitamin A (b-carotene), a powerful antioxidant. The food products containing pro-vitamin A are fruits in yellow and red, including apricots, tomatoes. Necessary in process of building and assimilation of proteins, affects the normal growth of bones and helps the treatment of eye diseases.Iinhibits the excessive action of the thyroid hormone - thyroxine, which simultaneously prevents the deposition of excess vitamin A. Necessary in the sports diet of in the form of food, such as dietary supplements and nutritional supplements.
Vitamin A deficiency causes growth inhibition, flaking and dryness of the skin, impaired night vision (i.e. Night blindness).
Excess of vitamin A leads to calcification of the bones and some soft tissues, and abnormalities in the functioning of glomerulonephritis
Dosage: Specified in IU and it is 5000 IU per day.
Retinyl palmitate - ester of vitamin A, especially valued in cosmetology. It is considered the gentlest form of this vitamin, therefore it is recommended to people with sensitive skin. It is also characterized by good assimilability in oral application, it is de-esterified without any problems in the small intestine to retinol, a fully active biological form of vitamin A.
Retinol demonstrates a wide range of activities in the human organism. Vitamin A is especially popular due to its positive influence on epithelial cells. It is responsible for proper, nourished state of skin, hair and nails. Apart from this, proper supply of retinol is also incredibly important for the health of the skeletal system, as vitamin A is a regulator of growth of bone tissue.
Vitamin A is also essential to maintain proper functions of eyesight. Its derivative, by binding with opsin, creates rhodopsin, which is responsible for stimulating the activity of rod cells located on eye retina. Thanks to this, it is possible to maintain proper vision in the conditions of poor lighting.
Some sources also suggest immunity functions of vitamin A. It may decrease the risk of pathogen permeation in the epithelium of the respiratory system.
Vitamin D belongs to fat soluble vitamins, occurs in three forms: calciferol (vitamin D1) ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3), it is formed under the action of sunlight for at least 15 minutes per day. In the absence of sunlight it should be administered in the diet in the form of fish oil (Vitamin A + D3) and fish oils. It is responsible for the absorption of calcium and phosphorus. It is the building substance of bone tissue particularly necessary during pregnancy, childhood, and for athletes. It is a component of dietary supplements and nutrients among competetive athletes. Deficiency of vitamin D causes children growth inhibition, and rickets.
For adults - deficiency causes osteomalacia.
Excess of vitamin D causes headaches, alopecia, nausea, drowsiness, blurred vision, pain in the long bones, the deposition of calcium deposits.
Dosage: 400 IU units during the day.
Cholecalciferol, or vitamin D3, is an organic chemical that belongs to the family of D vitamins. It is naturally found in fatty fish, fish oil, egg yolks, milk and dairy products. It is also synthesized in the human body. It is formed from 7-dehydrocholesterol present in the keratinocytes of the spinous and the basal layers of the epidermis, and a pre-requisite for initiating this process is the action of 290-315 nm wavelength UVB radiation on the skin.
Cholecalciferol is a biologically inactive compound. In the body, it undergoes enzymatic hydroxylation – first in the liver, with the participation of 25-hydroxylase, when calcidiol is formed and secondly in the kidneys, where under the influence of 1-α-hydroxylase, calcidiol is converted into the final active form – calcitriol.
The most important role of vitamin D3 in the body is the regulation of calcium-phosphate metabolism, which directly affects normal skeletal mineralization. In addition, it is involved in cell proliferation and differentiation, insulin secretion, as well as in some functions of the nervous, endocrine and immune systems.
Cholecalciferol is the most popular form of vitamin D used in dietary supplements. Studies show that supplementation with vitamin D in this form most effectively and rapidly raises the level of 25 (OH) D3 – a metabolite that is a marker of the level of vitamin D in the body.
Dosage: according to RDI standards for individual age groups.
Lanolin is obtained in the process of cleaning of raw sheep wool from the so-called wool fat, protecting it from getting wet and unbeneficial weather conditions.
Lanolin is commonly used for the production of ointments and creams with lubricating and softening effect, however, it also found application in the production of dietary supplements and more precisely vitamin D3.
In order to obtain vitamin D3 from lanolin, it undergoes cleaning and crystallization and then proper chemical processes, as a result of which 7-dehydrocholesterol is produced - a precursor of vitamin D3, the same which is produced in skin under the influence of UV radiation. 7-dehydrorocholesterol obtained from lanolin is then subjected to the above mentioned radiation, being transformed to vitamin D3.
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