Peter Thomas Roth Collagen Skinjection Plumping & Firming Serum

Plumping Firming: Peter Thomas Roth Collagen Skinjection is a lightweight face serum formulated with plant-derived exosomes, growth factor and stem cells, alongside collagen, elastin, hyaluronic acid and glycerin. The listing positions it for a plumper, firmer-looking complexion and recommends applying it twice daily, followed by moisturizer.

At a glance

Lightweight fluid serum with plant-derived exosomes, growth factor and stem cells, according to the listing.
Also contains collagen, elastin, hyaluronic acid and glycerin. The listing describes the latter two as humectants that help draw in water.
Suggested use is twice daily on a cleansed face, followed by moisturizer.
The brand describes one-week and four-week studies involving 30 women ages 31 to 70. These are manufacturer-reported claims, not independent verification.

Price

$45.50Save 30%

Reference price: ~~$65.00~~

Price checked: Nov 14, 2026

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Often bought together

Peter Thomas Roth | Peptide Skinjection™ Moisture Infusion Cream, Refillable Moisturizer, For Loss of Firmness and Elasticity, Fine Lines & Wrinkles, Dryness, 21 Amplified Peptides & Neuropeptides

$55.00

Peter Thomas Roth | Peptide Skinjection™ Amplified Wrinkle-Fix Serum, Clinically Proven Refillable Serum for Anti-Aging and Loss of Firmness, Matrixyl and Argireline, For All Skin Types

$65.00

Pros and cons

Pros

Combines plumping and firming-focused ingredients with hyaluronic acid and glycerin, which the listing says help skin feel hydrated.
The supplied routine is straightforward: apply to cleansed skin twice daily and follow with moisturizer.

Technical specifications

2 specifications

Identity
Brand	Peter Thomas Roth

Dimensions and listing details
Dimensions listed	1.8 x 1.8 x 4.5 inches; 6 ounces

What to know before buying

The listed dimensions entry includes a weight of 6 ounces but does not clarify whether that is product weight, shipping weight or another measurement. The listing also does not specify the serum's fill volume or full ingredient list in the supplied details.

Who is it for?

A good fit for

Shoppers looking for a face serum marketed for plumpness, firmness and the appearance of collagen loss.
People who want a lightweight serum featuring hyaluronic acid and glycerin as part of a twice-daily routine.

Less suited to

Shoppers who need a stated fill volume or a complete ingredient list to compare products, since neither is supplied in the available listing details.

Peter Thomas Roth Collagen Skinjection Plumping & Firming Serum · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 55 ratings

5 stars74%74%
4 stars7%7%
3 stars5%5%
2 stars4%4%
1 star10%10%

The supplied material includes aggregate customer ratings but no written review summaries. The rating distribution is mostly five-star, with a smaller one-star share, so overall ratings lean positive while still showing some variation. These figures do not explain customers' reasons or establish specific product strengths or drawbacks.

Frequently asked questions

How often does the listing recommend using this serum?

The suggested routine is to apply it to a cleansed face twice daily with continued use, then follow with moisturizer.

Which ingredients are highlighted?

The listing names plant-derived exosomes, growth factor, stem cells, collagen, elastin, hyaluronic acid and glycerin.

What does the supplied study information establish?

The brand reports one-week and four-week studies involving 30 women ages 31 to 70. The provided information does not independently verify the claimed results.

How much serum is in the container?

The supplied listing details do not state the fill volume. They provide dimensions and a 6-ounce measurement without clarifying what that weight represents.