Personal care compositions with glutathione precursor comprising 4-substituted resorcinols and amino acids

A personal care composition comprising:

• a. glutathione precursor comprising, by weight of the composition:
• i. from about 0.001% to about 2% of cystine;
• ii. optionally, from about 0.01 to about 10% of glycine;
• iii. from about 0.01 to about 10% of pyroglutamic acid or a salt or ester thereof;
• and
• iv. from about 0.001 to about 3% of a resorcinol selected from 4-hexylresorcinol, 4-ethylresorcinol, and 4-isopropylresorcinol;
• b. from about 0.005% to about 2% of a retinoid;
• and
• c. a cosmetically acceptable carrier;
• wherein the pH of the composition is in the range of from about 3.5 to about 8.5, and
• wherein the composition is in the form of a water-in-oil emulsion comprising cystine in an aqueous phase, wherein 90% of water droplets have a diameter within the size range of from 100 nm to 20 microns.