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Living Proof

Perfect hair Day (PhD) High-Shine Gloss Hair Treatment

4.2 · 315 reviews
4,036 ₽

What it is: A silicone-free in-shower gloss that's designed to transform dull hair by delivering 2x the shine*, smoothness + vibrancy with lasting results.*Laboratory testing vs. untreated.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Dryness- Shine- Straightening and SmoothingKey Benefits: - Instantly adds high shine- Delivers an ultra-glossy, smooth finish- Leaves hair silky softHighlighted Ingredients:- Light-Enhancing Technology: Illuminates dull tresses with high shine.- Proprietary Smoothing Technology: Aligns hair fiber.- Ceramide-Like Emollient: Helps seal cuticles to smooth hair.Ingredient Callouts: This product is cruelty-free.What Else You Need to Know: This high-shine gloss is powered by our Light Enhancing Technology that converts non-visible shine to visible light. For brilliant shine that lasts through 3 washes.* Unlike most hair glosses that coat your hair with heavy silicone, our lightweight formula is silicone-free, leaving no residue behind.*Laboratory testing vs. Untreated.Clean at Sephora

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What it is: A silicone-free in-shower gloss that's designed to transform dull hair by delivering 2x the shine*, smoothness + vibrancy with lasting results.*Laboratory testing vs. untreated.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Dryness- Shine- Straightening and SmoothingKey Benefits: - Instantly adds high shine- Delivers an ultra-glossy, smooth finish- Leaves hair silky softHighlighted Ingredients:- Light-Enhancing Technology: Illuminates dull tresses with high shine.- Proprietary Smoothing Technology: Aligns hair fiber.- Ceramide-Like Emollient: Helps seal cuticles to smooth hair.Ingredient Callouts: This product is cruelty-free.What Else You Need to Know: This high-shine gloss is powered by our Light Enhancing Technology that converts non-visible shine to visible light. For brilliant shine that lasts through 3 washes.* Unlike most hair glosses that coat your hair with heavy silicone, our lightweight formula is silicone-free, leaving no residue behind.*Laboratory testing vs. Untreated.Clean at Sephora

Customer reviews

1.0
verified purchase
Waste of money

I tried it twice, each time it left a heavy, dry film on my hair and somehow made it look and feel more dull. No idea why this has such good reviews but for my blind virgin hair this was a waste.

7/4/2026
1.0
verified purchase
complete waste of money

This did absolutely nothing good for my hair. No shine or smoothing.

4/29/2026
1.0
verified purchase
Did nothing

Used 30 ml I got in one of the Sephora favorites sets. This thing did absolutely nothing for me. Zero impact. One star for the smell - it’s something like green tea. Otherwise, I’d prefer to give it 0.

4/12/2026
1.0
verified purchase
Not so good

It made my hair really dry, dull and frizzy. I don’t recommend.

2/7/2026
3.0
verified purchase
Middle of the road type product

I will start with the pros: most importantly, it does not weigh my hair down. I don't feel I need to wash my hair sooner when I use it, which is a relief. My hair doesn't look bad after using it. However... the biggest negative is that I am not sure it does anything? I take good care of my hair, so maybe it just doesn't need the boost, but I was very whelmed. I can't say that I think my hair looks any different when using this, versus only shampoo and conditioning.

10/13/2025
5.0
verified purchase

Great product! It leaves my hair smooth, soft, and glossy without feeling greasy or heavy.

10/6/2025
5.0
verified purchase
Good for fine, low porosity hair, not thick hair

Used this as a sample and I'm in love. Makes my hair sooo shiny and soft. I have fine, low porosity hair and it's not easy to find something that adds moisture and shine without weighing it down and feeling heavy. I'm guessing if it's making people's hair drier, it's probably just not the right product for your individual needs and may need something heavier with protein or keratin. But if you have hair like mine it's a dream.

8/3/2025
1.0
verified purchase
Made my hair frizzy

I thought I was doing something wrong but after my 3 try, my hair was drier and more frizzy. Glad to see I’m not the only one

8/2/2025
1.0
verified purchase
Just don’t

Did not do anything but dried and frizzed up my hair. The smell is horrendous and made me feel sick.

7/31/2025
1.0
verified purchase
Horrible

They need to reformulate this gloss. Followed the instructions but this doesn’t do what it claims. It doesn’t add shine and makes hair feel very dry and rough. Made the hair tangle more and look dull and damaged. Do not buy this.

9/13/2026