Environmentally responsible personal cleansing compositions with high performance

A method of formulating a personal cleansing composition, comprising:

• selecting at least one primary surfactant;
• determining whether the at least one primary surfactant has a natural and renewable resource origin, and if it does not, then selecting instead at least one different primary surfactant that has a natural and renewable resource origin;
• selecting at least one secondary amphoteric and/or nonionic surfactant;
• determining whether the at least one secondary amphoteric and/or nonionic surfactant has a natural and renewable resource origin, and if it does not, then selecting instead at least one different secondary amphoteric and/or nonionic surfactant that has a natural and renewable resource origin;
• selecting at least one humectant;
• determining whether the at least one humectant has a natural and renewable resource origin, and if it does not, then selecting instead at least one different humectant that has a natural and renewable resource origin;
• selecting at least one polymeric and/or quaternary conditioner;
• determining whether the at least one polymeric and/or quaternary conditioner has a natural and renewable resource origin, and if it does not, then selecting instead at least one different polymeric and/or quaternary conditioner that has a natural and renewable resource origin;
• combining the selected primary and secondary surfactants with the at least one selected humectant and the at least one selected conditioner in a final composition including the combined primary and secondary surfactants at less than about 14 wt. %, and further including the combined at least one humectant and at least one conditioner at less than 5.5 wt. %;
• ensuring that the final composition has a total carbon percentage no greater than about 11.5%;
• ensuring that the final composition has carbon dioxide emissions that do not exceed about 2.5 g per 5 g of product dose or usage;
• and
• ensuring that the final composition having an optimum performance index (OPI) of at least about 5.450, calculated by the formula:
• OPI=3÷((solids wt. %+Zein score)÷performance grade).