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Living Proof


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Perfect hair Day (PhD)


SKU# R1201

Free shipping & returns

Free shipping & returns


A revolutionary weightlessly nourishing conditioner that lets you condition your way to beautiful, healthy hair, powered by our patented Healthy Hair Molecule (OFPMA), which:

  • delivers the five benefits for a perfect hair day - smoothness, volume, conditioning, strength and polish
  • helps you wash your hair less often
  • improves hair health instantly and gets better over time 

For all hair types. Sulfate-free, silicone-free and oil-free. Safe and formulated for color and chemically treated hair. 


After using PhD Shampoo, apply PhD Conditioner to clean, wet hair. Spread evenly throughout hair. Rinse. Style with PhD 5-in-1 Styling Treatment.


The Problem: Traditional conditioners contain silicones and oils, which build up on hair, attracting dirt and oil, and weigh it down. 

The Solution: PhD Conditioner is a revolutionary conditioner that is silicone and oil-free and is powered by our Healthy Hair Molecule (OFPMA), which creates a weightless shield around each hair strand that:

  • repels dirt & oil allowing you to wash your hair less often
  • promotes stronger, healthier and more manageable hair 
  • provides instant results that get better over time 

View the product ingredient list here.


Who is PhD Conditioner for?

Perfect hair Day (PhD) is for anyone that wants more perfect hair days. Whether you have multiple hair concerns or consider yourself to have “normal” hair, PhD is for women that seek a balance of smoothness, volume, conditioning, strength and polish.

How is PhD Conditioner different than No Frizz, Full and Restore?

PhD Conditioner was specifically formulated to give the ideal balance of the 5 benefits women seek for beautiful, healthy hair—smoothness, volume, conditioning, strength and polish. PhD is for women with multiple hair concerns or those that consider themselves to have “normal” hair. Our No Frizz, Full and Restore conditioners are formulated to focus on a specific concern. 

  • No Frizz Conditioner eliminates frizz by blocking humidity. 
  • Full Conditioner maximizes thickness, fullness and volume. 
  • Restore Conditioner repairs and protects dry or damaged hair. 

What is the fragrance in PhD Conditioner?

All of our products have a light, fresh, citrusy fragrance.

styles & tips

It is easy to get your favorite hairstyles using Perfect hair Day (PhD) Conditioner. Choose a look below to see the techniques our stylists used to create it. Effortless beauty is only a click away.


  • Allure
    2014 Allure, Best of Beauty Awards, Best Shampoo and Conditioner, Normal Hair
  • Cosmo for Latinas Beauty Awards
    2014 Cosmo for Latinas Beauty Awards, Best of Hair
  • Swedish Beauty Awards
    2014 Swedish Beauty Awards, Best Innovation
  • Cosmo for Latinas Beauty Awards
    2015 Cosmo for Latinas Beauty Awards, Best for Country: Shampoo and Conditioner
  • The Knot
    2016 The Knot, 2016 Beauty Awards: Hair- Shampoo & Conditioner

you are the Living Proof

4.75 Average rating

Perfect hair Day (PhD) collection

When the complete Perfect hair Day line is used together as a regimen, hair stays cleaner, longer. It looks and feels, well, perfect.

Learn more

Other products in the Perfect hair Day (PhD) family: