Abstract: In the instant disclosure relates to a leave-on hair treatment composition and to methods for treating hair using the hair treatment composition. The hair treatment composition include: (a) water; (b) about 5 to about 40 wt. % of one or more polyols chosen from glycerin, ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, pentylene glycol, diethylene glycol, dipropylene glycol, 1,3 propanediol, and a mixture thereof; (c) at least 20 wt. % of one or more oils; and (d) at least 0.5% of one or more C1-C9 non-polymeric and non-thiol, mono-, di-, and/or tri-carboxylic acids; and the ratio of ((a)+(b)) to (c) is about 1:1 to about 1:5. The composition imparts durability, hydration, and moisturization to hair in addition to desirable styling effects.

Abstract: The present invention provides a biomolecular composite which is a ghost cell which has been emptied of all or substantially all of the cytosolic contents of the cell including the nucleus and nuclear contents, preferably further having been fused with exogenous amphipathic molecules, wherein said composite has a hydrodynamic diameter of less than 6 ?m. The biomolecular composite may contain a cargo molecule and be capable of targeting a cell or tissue. Also provided are methods of preparing ghost cells, methods of preparing biomolecular composites and methods for their use.