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Castor oil
Castor oil
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This vegetable oil promotes hair and nail growth.
This oil is very nourishing: it moisturizes the scalp, making hair shinier and more supple. But that's not all: it also accelerates growth and regrowth. Be careful not to overuse it, though; this plant-based oil is greasy, and your scalp could quickly become accustomed to it! Use it as a mask once a week, massaging it into your scalp. You'll quickly see the difference, especially if you color your hair frequently or if it's recently been exposed to the sun.
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Details
Manufacturing: ECOCert
Oxidative potential of vegetable oils and butters:
Some fatty acids are more fragile than others. Under certain conditions, they degrade, and the vegetable oil loses its properties. Among the main sources of degradation are:
oxidation
degradation by heat: hydrogenation (above 180 °C),
Lipolysis: the breakdown of fatty acids in the presence of enzymes (lipase…)
Here we are interested in the phenomenon of oxidation, which is the most frequently encountered phenomenon for the cosmetic use of vegetable oils.
The oxidative potential of a vegetable oil and a butter depends on the nature and concentration of the fatty acids composing it.
Generally speaking, the more double bonds a fatty acid has, the higher its oxidation rate. The oxidation of fatty acids leads to their transformation into molecules that can be toxic to the body.
In practice, this oxidation phenomenon is easily identifiable because it is responsible for a change in the appearance of the vegetable oil (rancid smell, change in color).
Several factors accelerate this oxidation but are not necessary or sufficient to trigger the oxidation process: oxygen, light (UV), contact with pro-oxidant metals (iron or copper: beware of the conditioner!), the presence of pigments like chlorophyll, the presence of enzymes (lipases, etc.), and especially heat, which acts as a catalyst for these reactions. That is to say, it accelerates the chemical reactions. Other factors slow down this process, notably the oil's natural vitamin E content.
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