Abstract: The invention is to a carotenoid composition comprising:a) a carotenoid in an oil solvent wherein the weight of carotenoid in the carotenoid composition is up to 12%;b) a dispersion of a water dispersible matrix and a stabilizer, and optionally a non-oil solvent; andc) an emulsifier,wherein the carotenoid, non-oil solvent, water dispersible matrix, stabilizer and emulsifier all either exist naturally or are derived from natural sources without the use of chemical or synthesized compounds, nor chemically modified using processes of synthetic chemistry.

Abstract: The invention is a carotenoid agent for inhibiting the conversion of epithelial cells to tumours, the agent including an effective amount of a water insoluble carotenoid component in a suitable non-toxic carrier medium.

Abstract: The present invention provides a therapeutic agent for the treatment of a melanoma or melanomas by injection or intravenously including a mixture of: (a) a water soluble dispersible component; (b) an emulsifier component; and (c) a water insoluble carotenoid component in a suitable carrier medium.

Abstract: A method for harvesting algae of the genus Dunaliella from suspensions thereof in brines containing sodium chloride at a concentration of about 3M or above, wherein the algal suspension is contacted with an adsorbent having a hydrophobic surface so as to adsorb the algae thereon, and the adsorbent with the algae adsorbed thereon is separated from the brine..beta.-carotene and other useful cell components may be extracted from the adsorbed algae by treatment with a suitable solvent.