The invention provides recombinant polynucleotides comprising a nucleic acid encoding a CYP76AD6 or related gene and their use for producing L-DOPA from tyrosine and treating dopamine-responsive disorders, such as Parkinson's Disease. The invention also provides recombinant polynucleotides comprising a nucleic acid encoding a CYP76AD1 and/or CYP76AD6, a nucleic acid encoding a DOPA 4,5-dioxygenase (DOD) enzyme, such as Beta vulgaris DODA1, and, in some cases, a nucleic acid encoding betalain related glucosyltransferase, such as M. jalapa gene cyclo-DOPA 5-O-glucosyltransferase (cDOPA5GT), and their use for producing betalains. Finally, the invention provides chimeric polypeptides, expression vectors, cells, compositions, and organisms, including plants, and their uses in various methods of the invention.

Compositions in the form of an oil-in-water emulsion composition include an oil phase that includes a flavorant; and a continuous aqueous phase that includes water, a preservative, and an emulsifying agent, and optionally an emulsifier adjuvant; wherein the preservative includes one or more vitamins and/or salts thereof.

Compositions in the form of an oil-in-water emulsion composition include an oil phase that includes a flavorant; and a continuous aqueous phase that includes water, a preservative, and an emulsifying agent, and optionally an emulsifier adjuvant; wherein the preservative includes one or more vitamins and/or salts thereof.

Compositions in the form of an oil-in-water emulsion composition include an oil phase that includes a flavorant; and a continuous aqueous phase that includes water, a preservative and a phospholipid emulsifying agent, and optionally an emulsifier adjuvant; wherein the phospholipid emulsifying agent includes a low content of primary ammonium functional groups.

Compositions in the form of an oil-in-water emulsion composition include an oil phase that includes a flavorant; and a continuous aqueous phase that includes water, a preservative and a phospholipid emulsifying agent, and optionally an emulsifier adjuvant; wherein the phospholipid emulsifying agent includes a low content of primary ammonium functional groups.