Ideal for most hair types.
It's powered by their patented Healthy Hair Molecule (OFPMA), which in this formula does four things: smooths hair, polishes and protects strands, creates visibly healthier hair over time and helps repel dirt and oil to keep hair cleaner, longer. Living Proof Perfect Hair Day (PhD) Shampoo 2oz Living Proof Perfect hair Day (PhD) Shampoo is a revolutionary shampoo that helps deliver beautiful healthy looking hair, while helping hair feel cleaner, longer.