We used 10% gelatin solution for this purpose as it shows pseduoplastic behavior
and forms clear solutions.
Citric acid was added to adjust the pH to the desired level.
Lemon juice (1 mL) was also added as natural antioxidant, chelating agent and antidandruff agent to maintain the acidic pH of formulation.
Shampoo was further preserved by the addition of little amount of methyl paraben.
Final formula of the prepared shampoo is presented in Table 1.