Percentage of Sodium Lauroyl Methyl Isethionate Flakes in Shampoo vs. Facial Wash and Hand Dryness

Regarding your question about the percentage of Sodium lauroyl methyl isethionate flakes for shampoo compared to facial wash:

Based on the issue of hand dryness you experienced with 10% flakes, cosmeceutical7 recommended reducing the concentration to 4-5%, and potentially even 3-4%. While a facial wash might use around 5% of this ingredient, the optimal concentration for shampoo can vary depending on the overall formulation, the combination with other surfactants (like Cocamidopropyl Betaine), and the desired cleansing performance and mildness for hair and scalp.

The suggestion to reduce the percentage is specifically aimed at mitigating the dryness you observed on your hands. Starting with the lower percentages recommended by cosmeceutical7 (4-5% or 3-4%) is the correct approach to find a balance that cleans effectively without causing excessive dryness.