The GLP Besties

Name: The GLP Besties
Brand: Duo
SKU: BS-TGLPB-2.0
Price: 249.0 USD
Availability: InStock
Rating: 5.0 (244 reviews)

Scalp Serum + RET+

5.0

Rated 5.0 out of 5 stars

244

Meet the duo every GLP journey deserves. Our GLP Besties Duo brings together our powerhouse retinaldehyde, Ret+, and our advanced exosome-powered Scalp Serum to help address two of the most common concerns during GLP-1 journeys: skin laxity and visible hair thinning. Together, they create a proactive, high-performance pair to visibly restore skin firmness and hair fullness to help keep your hair and skin feeling as healthy and confident as the new you.

*Please Note: We’re evolving our look through 2026. During this transition, you may receive either our signature pink packaging or our new design. Rest assured, the size of the packaging and the formula inside will remain the same, with the quality and results you love.

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Recommended For

All skin and hair types, including dry, normal, combination, sensitive, and oily skin types

How To Apply

RET+

After washing face thoroughly with a cleanser, apply up to 3 pumps of RET+ to face and massage gently into skin. Feather onto jawline and neck. Top with moisturizer and be sure to use SPF the following morning!

SCALP SERUM

Apply 3–5 pre-measured droppers directly onto the scalp once daily. Use 2 droppers at the crown and hairline, and 1–2 droppers at the back of the scalp. For areas needing extra support, apply directly to the spot for targeted benefit.

You can apply on wet or dry hair. Gently massage the serum into your scalp with fingertips to ensure even distribution. Do not rinse. If applying to damp hair, allow it to air dry. Avoid blow-drying or heat styling immediately after application. Style as usual once dry.

When To Use

RET+

Apply in the evenings before your moisturizer.

SCALP SERUM

Apply once daily in the morning or evening

Texture

RET+

Buttery-soft formula

SCALP SERUM

Feels like a lightweight, non-greasy serum that melts into the scalp—delivering lasting hydration and an invigorating boost without any residue

Ingredients

RET+

Cyclopentasiloxane, Dimethicone Crosspolymer, Jojoaba Esters, Butyrospermum, Parkii (Shea) Butter, Hydrogenated Polyisobutene, Chamomilla Recutita (Matricaria), Flower Extract, Dimethicone/PEG-10/15 Crosspolymer, Glyceryl Caprylate, Methyl Methacrylate/Glycol Dimethacrylate Crosspolymer, Palmitoyl, Tripeptide -5, Retinal, Silica, Tetrahexyldecyl ascorbate, Tocopheryl Acetate, Dimethicone, Helianthus Annuus (Sunflower) Seed Oil, Glycerin, Potassium Sorbate, Sodium Benzoate, Bisabololo, Mica, Water (Aqua), Tocopherol, Dipropylene Glycol, BHT

SCALP SERUM

Purified Water, Glycerin, Butylene Glycol, Human Platelet Extract, Camellia Sinensis Leaf Extract, Trifolium Pratense (Clover) Flower Extract, Glycyrrhiza Glabra (Licorice) Root Extract, Serenoa Serrulata Fruit Extract, Citrus Paradisi (Grapefruit) Fruit Extract, Citrullus Lanatus (Watermelon) Fruit Extract, Pisum Sativum (Pea) Sprout Extract, Rosmarinus Officinalis (Rosemary) Leaf Oil, Mentha Piperita (Peppermint) Oil, Arginine HCl, Sodium Benzoate, Panthenol, Caffeine, Nicotiana Benthamiana Hexapeptide-40 sh-Polypeptide-76, Chlorophyll, Copper Tripeptide-1, 1,2-Hexanediol, Caprylyl Glycol, Dextran, Acetyl Tetrapeptide-3, Biotinoyl Tripeptide-1, Nicotiana Benthamiana Hexapeptide-40 sh-Oligopeptide-1, Ethoxydiglycol, Phospholipids, Polysorbate 20, Leuconostoc/Radish Root Ferment Filtrate, Disodium EDTA, Phenoxyethanol.

The GLP Besties

$249.00 ~~$277.00~~

What GLPs shift… We support.

GLP medications can lead to skin laxity and visible hair thinning.

Together, Ret+ and Scalp Serum create a high-performance routine designed to:

• Support visible firmness
• Help maintain collagen integrity
• Preserve visible hair density

OUR INGREDIENTS

The Science Behind Results

RET +:
Retinaldehyde 0.12% - Promotes skin cell turnover, minimizes fine lines, wrinkles, improves skin tone and texture, and fights acne and clogged pores

Bakuchiol - Helps boost collagen and smooth fine lines and wrinkles while minimizing dark spots

THD Ascorbate (Vitamin C) - Evens skin tone, reduces free radical damage, and supports healthy collagen and elastin production

Palmitoyl Tetrapeptide-72 - visibly improves the firmness & elasticity of the skin and reduces pore size

Niacinamide - Minimizes redness, evens skin tone, and reduces the appearance of large pores and dark spots

Resveratrol - Provides skin-soothing properties to minimize redness and inflammation

SCALP SERUM:

Exosomes – naturally occurring messengers that help support the natural hair cycle for thicker, fuller looking hair.

Copper Tripeptide-1 – Nourishes and conditions the scalp to help hair feel stronger and look naturally thicker over time.

Biotinoyl Tripeptide-1 – Fortifies the look of each strand for hair that appears stronger and more resilient.

Rosemary Oil – Invigorates the scalp and helps refresh follicles for a sense of renewed fullness.

Saw Palmetto – Supports the appearance of healthy, dense hair by helping maintain a balanced scalp environment.

Acetyl Tetrapeptide-3 – Works at the root to help minimize visible shedding and keep hair feeling anchored and resilient.

OUR INGREDIENTS

The Science Behind Results

RET +:
Retinaldehyde 0.12% - Promotes skin cell turnover, minimizes fine lines, wrinkles, improves skin tone and texture, and fights acne and clogged pores

Bakuchiol - Helps boost collagen and smooth fine lines and wrinkles while minimizing dark spots

Niacinamide - Minimizes redness, evens skin tone, and reduces the appearance of large pores and dark spots

Resveratrol - Provides skin-soothing properties to minimize redness and inflammation

Morning Routine

Cleanse / to wash and cleanse
Tonic / to brighten and Clarify
Vitamin C / to protect and brighten
Serum / to amplify results
Eye Cream / to depuff and fight wrinkles
Moisturizer / to hydrate and smooth
Sunscreen / to protect against UV damage

Evening Routine

Cleanse / to remove makeup and impurities
Tonic / to tighten and illuminate
Serum / to boost results
Eye Cream / to hydrate and restore
Retinoid / to support collagen and fight aging
Moisturizer / to hydrate and smooth
Scalp Serum / to revive and nourish

5.0

Rated 5.0 out of 5 stars

Based on 244 reviews

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244 reviews

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VW
Valerie W.
Verified Buyer
Reviewing
Scalp Serum
I recommend this product
Age 45-54
Concern Hair Thinning/Shedding
Hair Type Curly
Hair Texture Fine
Scalp Type Normal
Rated 5 out of 5 stars
3/3/26
Scalp serum
I have been using the scalp serum for a little over 3 months now. It seems to be working, my hair feels thicker at the roots and I am noticing less fallout in the shower. Doesn’t hurt that it smells great too!
Was this helpful?
CO
Colleen O.
Verified Reviewer
Reviewing
Scalp Serum
I recommend this product
Age 55+
Concern Hair Thinning/Shedding
Hair Type Straight
Hair Texture Fine
Scalp Type Normal
Rated 5 out of 5 stars
3/1/26
Recommend this hair serum
I recommend this hair serum to anyone experiencing hair loss or hair thinning. I am 70 years old and my daughter bought me this for Christmas and it has been the only thing that has helped me. I am absolutely thrilled!
Was this helpful?
M
Megan
Verified Reviewer
Reviewing
Scalp Serum
I recommend this product
Concern Hair Thinning/Shedding
Hair Type Straight
Hair Texture Medium
Scalp Type Normal
Rated 5 out of 5 stars
3/1/26
Most loved product!
I just added this new scalp serum to my daily routine and I’ve noticed such a difference! It’s hard to find one that doesn’t leave your hair greasy and this one does not! Highly recommend this product!
Was this helpful?
C
CJ
Reviewing
Scalp Serum
I recommend this product
Concern Hair Thinning/Shedding
Hair Texture Thick/Coarse
Rated 5 out of 5 stars
2/28/26
5 stars all around!
I have been using this for 4 months. I have tried so many hair growth serums and this is the only one that has worked for me. The best part is it doesn’t make your hair look greasy. Recommend to anyone that is experiencing hair loss.
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The GLP Besties

Scalp Serum + RET+

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The GLP Besties

What GLPs shift… We support.

What GLPs shift… We support.

OUR INGREDIENTS

The Science Behind Results

OUR INGREDIENTS

The Science Behind Results

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