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Perfect hair Day (PhD)


SKU# R1101

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A revolutionary shampoo that lets you wash your way to beautiful, healthy looking hair. Powered by our patented Healthy Hair Molecule (OFPMA), Perfect hair Day (PhD) Shampoo is the first step to:

  • helping you wash your hair less often
  • making hair look healthier instantly and improves over time

Perfect hair Day (PhD) Shampoo is ideal for all hair types. It is sulfate-free and silicone-free. Safe formulated for colour and chemically treated hair.

Apply PhD Shampoo to wet hair. Massage into a rich lather. Rinse. Follow with PhD Conditioner.

Who is Perfect hair Day (PhD) Shampoo 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 Perfect hair Day (PhD) Shampoo different than No Frizz, Full and Restore?

PhD Shampoo 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 Shampoos are formulated to focus on a specific concern.

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

Are Living Proof Shampoos sulfate-free?

Yes, Living Proof shampoos, outside of our non-lathering Curl Conditioning Wash, are all sulfate-free and carefully designed to gently cleanse with a rich, creamy lather. 

Is Perfect hair Day (PhD) Shampoo sulfate-free?


Why should I care about sulfate-free?

Living Proof lathering shampoos are all sulfate-free. We carefully design our products to be gentle and create a rich creamy lather. Not all sulfate-free products can claim this.  We believe, if you are looking for a gentle cleansing alternative, it does make sense to consider sulfate free shampoos. While sulfates are very effective cleaning agents that create big lather, they create big lather; however, over use can strip hair of its natural surface oils and make it feel rough, dry and brittle. It can also strip the scalp of its natural oils, leading to dryness and irritation.  Examples of commonly used sulfate ingredients which provide big lather include Sodium Lauryl Sulfate, Sodium Laureth Sulfate, Ammonium Lauryl Sulfate, Sodium Laureth Sulfate. 

What is the fragrance in Perfect hair Day (PhD) Shampoo?

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


  • TotalBeauty.com Awards
    2014 TotalBeauty.com Awards, Editor's Pick - Best Shampoo
  • Allure
    2014 Allure, Best of Beauty Awards, Best Shampoo and Conditioner, Normal Hair
  • Prevention
    2014 Prevention, Beauty Awards, Best Shampoo
  • 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

love notes

1st time=love
Posted by Kelsey on April 28, 2017

I just got the shampoo and conditioner both phd in the mail today and had ordered it cause I just moved into a new place and I think the water was leaving stuff in my hair that was making it feel greasy right out of the shower and I used my phd today and my hair feels like it just came from the salon! I have very thick and heavy hair and it feels so light and free! I'm definitely a fan and don't see myself buying any other brand here on out!!

Well played, Living Proof. Well played.
Posted by AJ on September 16, 2016

I use this in conjunction with the PhD conditioner, 5-in-1, and Night Cap, along with the Full Thickening Cream. My hair has never looked or felt healthier, or taken less time to style. I have fine, wavy hair (and lots of it), and this gets it clean and helps it to stay hydrated and frizz-free without drying it out or weighing it down. My hair has improved over the time I've been using PhD, and really helps bring out the best in my hair. Definitely a keeper.

My fine, limp hair never had it so good!
Posted by Leslie on August 24, 2016

I grew up with an Aunt who was a hairdresser so I was able to try all kinds of shampoo & conditioner over the years. Never has my fine, limp hair had the body and manageability that it has when I use PHD. Better still, My hair looks as good at the end of the day as it does at the beginning. The search is over! I can't thank you enough Living Proof. XOX

| Love Notes 1-3 of 51 |

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: