How is Perfect hair Day (PhD) Shampoo different than No Frizz, Full and Restore? Amazon. Living Proof Perfect Hair Day Dry Shampoo. 99 ... Target the roots, then distribute the product with fingers or a comb, throughout the rest of the hair. PhD Shampoo was specifically formulated to give the ideal balance of the 5 benefits women seek for beautiful, healthy hair… EWG scientists reviewed the Living Proof Perfect Hair Day Dry Shampoo product label collected on March 02, 2020 for safety according to the methodology outlined in our Skin Deep Cosmetics … Product Title Living Proof ($25 Value) Living Proof Perfect Hair Day Dry Shampoo, 4 Oz Average Rating: ( 4.7 ) out of 5 stars 37 ratings , based on 37 reviews Current Price $19.99 $ 19 . Runner-Up, Best Volumizing: Living Proof Perfect Hair Day Dry Shampoo Buy on Sephora Buy on Ulta This fan-favorite dry shampoo contains a molecule (called OFPMA) that’s effective at protecting hair from frizz and oil, so—as the name suggests—you can have a perfect hair day every single day. After years of testing hundreds of different iterations of the stuff, I can confidently say that Living Proof Perfect Hair Day (PhD) Dry Shampoo ($25) is the best that money can buy.