Q&A: Can I use sodium lauroyl sarcosinate in place of SCI in a creamy cleanser?

In the July Q&A, Tessa asked, So here’s where I need help: How to substitute surfactants. There’s a formula that calls for 5% SCI (powder) and I’d like to use Sodium Lauroyl Sarcosinate instead. But how can I know what % of this ingredient to use so I can get the same cleansing effect as...

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