Question: It is desired to develop a day cream with sun-blocking, antioxidant, and moisturizing functions. The cream has to be transparent because it is used indoors.

It is desired to develop a day cream with sun-blocking, antioxidant, and moisturizing functions. The cream has to be transparent because it is used indoors. The skin has a variety of antioxidants localized in the epidermis and, to a certain extent, in the dermis to protect skin against damaging effects from reactive oxygen species. The supplementation of a sunscreen cream with antioxidants provides a rational approach to ameliorate the solar UV-induced skin damage. The cream has to be water based so that the cream does not feel oily even with a moisturizing agent. Perform the following tasks for this product development project:

(a) Prepare a comprehensive review of the technical background for this product emphasizing the role of antioxidants.

(b) Summarize the desired product attributes for this day cream.

(c) Identify antioxidant candidates.

(d) Perform a competitive analysis for this day cream.

(e) Create an objective-time chart for the overall project.

(f) Generate the RAT $^{2}$ IOs for the main tasks in the objective-time chart in (e).

(g) Provide process flowsheet alternatives for manufacturing this cream.

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