Assuming you don’t have a bolt of silk fabric, yes. Hydrolyzed silk peptides, hydrolyzed silk amino acids, and hydrolyzed silk powder are all generally interchangeable. The difference is in the mesh of the powder. Powder is the coarsest, peptides are the middle of the road, and amino acids are the finest. The finer, the more easily absorbed, but unless otherwise stated they can be swapped for one another without noticing much (or any) difference in the final product.
Tussah silk is silk that’s still in fiber form—you’ll get it in a sort of lump of wispy fibers that you can pull apart. It isn’t hydrolyzed, which means it won’t dissolve in water. We need silk to dissolve in water to work with it in our concoctions, so tussah silk really isn’t very useful.
If you’ve got liquid silk, you can still use it, but only in recipes that contain water and are already liquid; things like lotion, soap, and conditioner are a go, but powdered cosmetics or 100% oil based things won’t work out.
Posted in: Ingredients