CBD, this new trendy active ingredient in cosmetics.

The cannabidiol (C21H30O2), more commonly known by the acronym CBD, is an organic terpenic compound from the phytocannabinoid family, naturally present in all varieties of hemp (Cannabis sativa L.), predominantly in the flowers and adjacent leaves. It resembles the cell signalling molecules of the human body's endocannabinoid system to regulate a state of homeostasis, thus being able to bind to receptors.

It is one of the major constituents of hemp, up to 5% depending on the variety, following tetrahydrocannabinol (THC), which is classified as a narcotic. However, CBD is non-psychoactive, presents no risk of physical dependency, and is not considered harmful to health, as evidenced by the decisions of the World Health Organisation (WHO) and the anti-doping agency.

In 1940, CBD was first isolated from cannabis by Roger ADAMS. Its molecular structure was not fully elucidated until 1963 by the Israeli doctor Raphaël MECHOULAM. For many years, research was primarily focused on THC, declared as the active principle of cannabis, almost completely excluding CBD. It was only in 2018 that the substance gained popularity following its legal authorisation for sale, recognised for its wide range of biological activities.

Often misunderstood due to its plant-based origin, the consumption of cannabis has frequently been linked to certain deficiencies. However, studies have shown that CBD lends itself to various beneficial applications. Lauded as a relaxant, analgesic, anti-epileptic, anti-spasmodic, anti-emetic, and more, therapeutic claims of CBD have been made. Indeed, it acts as a homeostatic regulator of various biological systems.

In recent years, thanks to the evolution of the legislative framework, the growing popularity of CBD has sparked numerous studies on its various benefits to the body and its positive impacts in managing many conditions (chronic diseases, anxiety, neurological disorders, sleep disorders, etc.). Some cannabidiol-based medications are even already available on the pharmaceutical market. The CBD has also become a promising avenue for skin diseases due to the numerous virtues it possesses.

• Soothing and calming effect: CBD has the ability to interact with the TRPV receptor, leading to its desensitisation. This ability to activate these receptors then results in analgesic effects, helping to combat pain. It can therefore be useful in relieving itching, irritation and discomfort, as well as helping to calm sensitive and reactive skin;

• Regulatory impact of CBD on the production of reactive oxygen species (ROS): CBD can lead to a decrease in the enzymatic activity of Nox, a producer of ROS, and an increase in the activity of superoxide dismutase (SOD), capable of eliminating ROS. It can therefore help to protect the skin against damage caused by free radicals. This may contribute to preventing signs of premature ageing;

• Diminishing effect on inflammation : Cells, rodents, humans... several studies have shown the ability of CBD to modulate the immune system and reduce inflammation through various means: inhibition of the COX2 enzyme involved in the immune response, reduction of the effects of pro-inflammatory mediators and increase in the levels of anti-inflammatory signals. This property would thus help to soothe and reduce inflammation and redness associated with various chronic inflammatory diseases (acne, eczema, psoriasis);

• Bactericidal mechanism: CBD can reduce the growth of certain bacterial strains (Staphylococcus aureus, Streptococcus pneumoniae and Clostridioides difficile)by altering the membrane. This helps to prevent the proliferation of bacteria that lodge on the epidermis and contribute to the exacerbation of inflammation;

• Regulation of Sebum Production: A Hungarian study has demonstrated a direct effect of CBD on the cellular proliferation of sebocytes, which are responsible for sebum production. It is also capable of inhibiting lipogenesis (the synthesis of fatty acids). Thus, CBD is able to regulate the sebum production process by the sebaceous glands, a beneficial action for individuals with oily skin as well as acne-prone skin.

The CBD market has significantly expanded due to numerous clinical studies demonstrating the effects of "therapeutic" use, as well as decriminalisation and/or legalisation in certain regions of the world. Infusion, CBD oil, e-liquid, cream, capsule... there are various methods of administering CBD.

• When used sublingually in the form of CBD oil or paste, it provides a quick and effective result due to optimal absorption through the oral mucosa and the absence of its metabolisation by the liver;

• Administered orally in soluble form, as an infusion (tea, herbal tea) or in tablets (capsules, pills, gummies) with a slower and longer-lasting effect than sublingual administration, as well as a lower absorption of CBD by the body;

• In transdermal application with the use of cosmetic products in various galenic forms (cream, balm, oil...) or CBD patches, implicated for targeted issues, for absorption at the skin surface level without going through the bloodstream.

At Typology, we have developed a range of products containing CBD: a soothing botanical blend and a balm-mask.

• Through respiratory route by inhalation (e-liquid) or vaporisation, a method of administration that allows for almost immediate effects.

Is the use of CBD legal?

Neither toxic, performance-enhancing, nor psychoactive, CBD is legal in France since November 2020, as well as in most countries of the European Union. However, its sale is only legal in France in compliance with certain conditions.

• The CBD must come from a specific variety of hemp, the cultivation of which complies with the rules set by the Common Agricultural Policy, applicable since 1st January 2023;

• All products containing CBD must have a THC content of less than 0.3%, otherwise they risk being subject to the anti-drug policy under the decree of 30th December 2021;

• It is forbidden to claim therapeutic virtues on any CBD product, except for those authorised as a medicine, under penalty of criminal sanctions.