A combination of N-acetyl-L-cysteine, selenium in the form of selenomethionine and melatonin, and a medical product or pharmaceutical composition comprising such combination, useful for the treatment of a variety of diseases and conditions is described. The combination of N-acetyl-L-cysteine, selenium in the form of selenomethionine and melatonin is also useful for cosmetic treatment of skin and as an antibacterial agent.

Described herein are compositions and methods for the treatment of meibomian gland dysfunction. Said compositions and methods comprise keratolytic agents, such as salicylic acid, selenium disulfide, or the like. Topical administration of said compositions to the eyelid margin or surrounding areas provides therapeutic benefit to patients suffering from meibomian gland dysfunction.

Described herein are compositions and methods for the treatment of meibomian gland dysfunction. Said compositions and methods comprise keratolytic agents, such as salicylic acid, selenium disulfide, or the like. Topical administration of said compositions to the eyelid margin or surrounding areas provides therapeutic benefit to patients suffering from meibomian gland dysfunction.

A method of protecting the internal protein of hair from damage by ultraviolet light, comprising the step of applying, to the hair, a hair treatment composition comprising a lactone, a disaccharide, an inorganic salt and an organic acid or salt thereof, having a pH in the range of from 3 to 6.5 prior to the application of an ultraviolet light to the hair, and a use of such a hair treatment composition, in the treatment of hair, to protect hair from damage by ultraviolet light.

A method of protecting the internal protein of hair from damage by ultraviolet light, comprising the step of applying, to the hair, a hair treatment composition comprising a lactone, a disaccharide, an inorganic salt and an organic acid or salt thereof, having a pH in the range of from 3 to 6.5 prior to the application of an ultraviolet light to the hair, and a use of such a hair treatment composition, in the treatment of hair, to protect hair from damage by ultraviolet light.

Disclosed are a composition containing a transition metal, as well as a method of treatment of bacterial, or of fungal diseases using such composition. The composition functions as novel bactericides and antifungal agents. The transition metal may be in either soluble or insoluble form.

The present invention concerns a cosmetic method for dyeing or making up keratin fibres, in particular eyelashes and/or eyebrows and preferably eyebrows, comprising the application, to the keratin fibres, of at least: a) A dyeing cosmetic composition A comprising, in a physiologically acceptable medium, one or more natural dye(s) chosen from the group consisting of neoflavonoids, gallic tannins and catechic tannins, and/or proanthocyanidins and the derivatives of same and the mixtures thereof, or preferably one or more plant extracts containing same, and advantageously an antioxidant, b) A revealing cosmetic composition B comprising, in a physiologically acceptable medium, at least one iron salt and/or one aluminium salt, in particular an iron gluconate or an iron sulphate, composition A being applied before or after composition B, and preferably before composition B.

The present invention concerns a cosmetic method for dyeing or making up keratin fibres, in particular eyelashes and/or eyebrows and preferably eyebrows, comprising the application, to the keratin fibres, of at least: a) A dyeing cosmetic composition A comprising, in a physiologically acceptable medium, one or more natural dye(s) chosen from the group consisting of neoflavonoids, gallic tannins and catechic tannins, and/or proanthocyanidins and the derivatives of same and the mixtures thereof, or preferably one or more plant extracts containing same, and advantageously an antioxidant, b) A revealing cosmetic composition B comprising, in a physiologically acceptable medium, at least one iron salt and/or one aluminium salt, in particular an iron gluconate or an iron sulphate, composition A being applied before or after composition B, and preferably before composition B.

A reductive composition, suitable for the dental industry, which utilizes sodium dithionite may be provided when it is combined with either polyethyloxazoline or polyvinylpyrrolidone. Other dithionite molecules, such as potassium dithionite, may be used. Likewise, the methods described herein may be applied to other reductive agents.

A reductive composition, suitable for the dental industry, which utilizes sodium dithionite may be provided when it is combined with either polyethyloxazoline or polyvinylpyrrolidone. Other dithionite molecules, such as potassium dithionite, may be used. Likewise, the methods described herein may be applied to other reductive agents.