Using Hydrolyzed Keratin (Liquid, Deodorized) in Shampoo/Conditioner

Based on the properties of Hydrolyzed Keratin (Liquid, Deodorized), it is a water-soluble ingredient suitable for hair care products like shampoo and conditioner.

1. Can you mix it directly into existing shampoo/conditioner?
   Yes, you can mix Hydrolyzed Keratin (Liquid, Deodorized) directly into your regular shampoo or conditioner. It is designed to be mixed into the water phase of formulations, and finished shampoo/conditioner is primarily water-based.
   Your proposed ratio of 2.5g in 250g (which is 1%) is within the recommended usage rate range of 0.1-5.0% (with 2.0% being recommended for rinse-off products like shampoo/conditioner). So, adding 1% is acceptable.

2. If mixed, just shake the bottle?
   Yes, after adding the Hydrolyzed Keratin (Liquid, Deodorized) to your shampoo or conditioner, close the bottle tightly and shake well to help disperse the liquid evenly throughout the product.

Adding Hydrolyzed Keratin can help protect and restore damaged hair, making it stronger, more moisturized, and shiny.

Since mixing directly is possible, a new shampoo formulation isn't strictly necessary based on your question's condition.