Extracts of
New extracts of Nannochloropsis sp. and related species of Nannochloropsis are suggested, obtainable by treating said microalgae with a solvent selected from the group consisting of C 1 -C 1 aliphatic alcohols, ethyl acetate, water or their mixtures, removing the dissolved extracts from the residues and recovering the pure extracts from the solvent. The extracts show excellent properties particularly in modulating the metabolism of human skin and hair follicles.
1. A method for the treatment of a human hair or skin condition selected from the group consisting of human skin melanogenesis, skin hyperpigmentation, skin spots, hair loss, hypodermal disorders, cellulite, reducing growth of human hair, and adipocyte metabolism comprising topically administering on the skin or scalp of a subject in need thereof, an extract of Nannochloropsis sp. obtained by the steps of:
(a) bringing microalgae in contact with a solvent selected from the group consisting of C1-C4 aliphatic alcohols, ethyl acetate, and mixtures thereof, and mixtures of C1-C4 aliphatic alcohols with water, in an amount suitable to make active move into the solvent phase,
(b) removing the dissolved extract from the residue, and
(c) recovering the pure extract from the solvent,
in an amount effective for fighting or preventing disorder or dysfunction connected to human skin melanogenesis, or skin hyperpigmentation and spots, or
hypodermal disorders by modulation of adipocyte metabolism, or
cellulite,
in an amount effective for modulating
growth of human hair, or
the adipocyte metabolism, or
the skin melanogenesis.
2. The method according to claim 1 , comprising (a) extracting with a mixture of two or more of said solvents.
3. The method according to claim 1 , wherein (a) the solvent is ethyl acetate.
4. The method according to claim 1 , wherein (a) the solvent is ethanol.
5. The method according to claim 1 , wherein the extract of Nannochloropsis sp.is combined with a cosmetically acceptable carrier selected from the group consisting of C1-C4 aliphatic alcohols, polyols having 3 to 12 carbon atoms, oil components, water, and mixtures thereof.
6. The method according to claim 1 , wherein Nannochloropsis sp. are N. granulate, N. limnetica, N. oceanica or N. oculata.
7. A method for the treatment of a human hair or skin condition selected from the group consisting of human skin melanogenesis, skin hyperpigmentation, skin spots, hair loss, hypodermal disorders, cellulite, reducing growth of human hair, and adipocyte metabolism consisting of topically administering on the skin or scalp of a subject in need thereof, an extract of Nannochloropsis sp. obtained by the steps consisting of:
(a) bringing microalgae in contact with a solvent selected from the group consisting of C1-C4 aliphatic alcohols, ethyl acetate, and mixtures thereof, and mixtures of C1-C4 aliphatic alcohols with water, in an amount suitable to make active move into the solvent phase,
(b) removing the dissolved extract from the residue, and
(c) recovering the pure extract from the solvent,
in an amount effective for fighting or preventing
disorder or dysfunction connected to human skin melanogenesis, or
skin hyperpigmentation and spots, or
hypodermal disorders by modulation of adipocyte metabolism, or
cellulite,
in an amount effective for modulating
growth of human hair, or
the adipocyte metabolism, or
the skin melanogenesis.