INCI declaration of the ingredients:

Alcohol, Aqua, Isopropyl Alcohol, Lactic Acid, VA/Crotonates/Vinyl Neodecanoate Copolymer, Sodium Hydroxide, Biotin, Panthenol, Aminomethyl Propanol

Further explanations of the ingredients:

Alcohol:
Ethyl alcohol: Body identical. Has a refreshing and antibacterial effect. Also serves as a solvent for other ingredients. Contrary to claims to the contrary, there is no risk of a drying effect on the skin at normal application concentrations!

Aqua:
Water. It accounts for around 65% of the weight of the human body and is therefore of fundamental importance for bodily functions, including those of the skin. In many cosmetic products (aqueous solutions, cleansers, emulsions), water is the ingredient with the largest proportion of the formulation in terms of quantity and forms the basis of the aqueous phase in emulsions. Water is a good solvent for polar (hydrophilic) substances such as alcohols, water-soluble vitamins or salts. For use in cosmetic products, the water used is generally pre-treated to remove microorganisms that could lead to spoilage of the product or dissolved salts that may impair the stability of emulsions or gels (sterilization and desalination).

Isopropyl Alcohol:
Iso-propanol: Has a disinfectant effect like ethanol, but unlike ethanol it also dissolves natural fats.

Lactic Acid:
Lactic acid. Occurs as a metabolic product in the body and on the skin, has a peeling effect on the horny layer in higher concentrations and at a low pH value of 2 to 3, supports the moisture content in buffered form (physiological pH value of the skin approx. 5.5) and preserves the skin's protective acid mantle.

VA/Crotonates/Vinyl Neodecanoate Copolymer:
Film formers in hair styling products

Sodium Hydroxide:
Sodium hydroxide. Used to adjust the pH value of cosmetic products. Sodium and hydroxide ions are identical to the body.

Biotin:
Vitamin H, important for the normal function of skin and hair

Panthenol:
D-panthenol = provitamin B5: Improves and increases the skin's ability to retain moisture, has an anti-inflammatory effect, reduces or inhibits itching. Stimulation of epithelialization: Small wounds (shaving), skin abrasions, blisters heal better. When used in hair care products, it is not only deposited on the hair and scalp, it also penetrates them and has a long-term effect. As pantothenic acid is an important component of healthy hair, the precursor D-panthenol serves as “food for the hair” according to scientific studies. It provides the hair with long-lasting moisture, improves the combability of the hair, reduces the formation of split ends, improves the condition of damaged hair, thickens the hair and gives it shine. The brittleness of fingernails is reduced.

Aminomethyl Propanol:
Neutralizing agent for gelling agents and resins