N-acetyl cysteine based compositions

A method of treating a disease or condition as disclosed herein comprising administering to a patient in need thereof a composition comprising

• n-acetyl cysteine;
• vitamin C;
• and
• a carotenoid selected from the group consisting of alpha carotene, beta carotene, lutein, zeaxanthin, and combinations thereof.

The method of claim 1, wherein the composition is contained in a delivery system comprising

• a two-piece bottle cap comprising two pieces, the two pieces defining a storage chamber, the storage chamber comprising the composition;
• and
• a bottle comprising a solvent,
• wherein the two pieces in the two-piece bottle cap are interconnected in an open state or in a closed state, wherein the composition in the storage chamber is released into the solvent in the bottle when the two pieces are interconnected in the open state, and wherein the composition in the storage chamber is not released into the solvent in the bottle when the two pieces are interconnected in the closed state,
• wherein the two-piece bottle cap comprises a composition delivery mechanism that switches the interconnection between the two pieces from the closed state to the open state.