Alastin INhance Post-Injection Serum® Review

Alastin INhance Post-Injection Serum with TriHex Technology® is a physician-dispensed serum designed to support skin recovery after treatments such as dermal filler, neuromodulator injections, microneedling or RF. Applied with its cooling metal tip, it's formulated with peptides and botanicals including Arnica to help calm treated skin and support the appearance of a smoother, more even complexion during recovery.

What is INhance Post-Injection Serum?

Skin can look and feel different for a few days after an injectable or energy-based treatment — some redness, mild swelling and occasional bruising are a normal part of the process. INhance Post-Injection Serum is Alastin's answer to that window: a lightweight, physician-dispensed formula designed to be applied directly to treated areas, using a built-in cooling metal applicator tip that's intended to provide immediate soothing contact on tender skin. It sits alongside Alastin's wider TriHex Technology® range, which also includes leave-on treatments for everyday use. For the full range, see our Alastin reviews hub.

Key ingredients

The formula is built around Alastin's TriHex Technology®, a peptide-antioxidant complex the brand also uses across its Restorative range, designed to support the skin's own process of clearing damaged collagen and elastin so it can be replaced with new, healthy protein. In INhance, that base is combined with:

• Acetyl Hexapeptide-38 and Palmitoyl Hexapeptide-12, peptides included to support the skin's natural repair signalling
• Arnica (Arnica Montana Flower Extract), a botanical long used in skincare to help calm the look of stressed skin
• Ledum Palustre (Labrador Tea) Extract, another calming botanical extract
• Tripeptide-1 and Sodium Hyaluronate Crosspolymer, supporting actives in the wider formula

Alastin references published research in the Journal of Drugs in Dermatology in support of this formula's post-procedure benefits. We haven't independently reviewed that study, so we've kept the specific percentage figures out of this page — see the data gap note below.

What it's formulated to help with

INhance is designed to be used in the days immediately following a procedure, to help:

• Support the skin's appearance during the bruising and swelling window after injectables
• Provide a cooling, soothing sensation on tender, recently treated skin
• Support the skin's natural repair processes alongside professional aftercare
• Help improve the appearance of skin texture and hydration as treated areas settle

How and when to use it

INhance is typically applied directly to treated areas in the days following a procedure, using the cooling applicator tip, as advised by the treating clinician — frequency and duration vary by treatment type, so we'd always defer to your practitioner's specific aftercare instructions rather than a generic schedule. It's designed to be gentle enough for use around the eyes and lips, where filler and neuromodulator treatments are common.

INhance vs Regenerating Skin Nectar

Alastin also makes Regenerating Skin Nectar, a broader everyday TriHex Technology® serum aimed at general skin quality rather than post-procedure recovery specifically. If you're only looking for short-term aftercare around a single treatment, INhance is the more targeted choice; if you want an ongoing TriHex serum for daily use, Regenerating Skin Nectar is the better fit. See our full comparison for the detail.

Recovering from a procedure and building a wider aftercare routine? Our round-up of the best post-procedure skincare in the UK covers where INhance sits alongside other aftercare options.

Who it's suitable for

INhance is positioned for anyone undergoing dermal filler, neuromodulator (Botox-type), microneedling, RF microneedling or similar in-clinic treatments, and is described as suitable for all skin types including oily, combination and dry skin. As it's typically physician-dispensed, it's worth checking with your treating clinic on the specific aftercare protocol they'd like you to follow alongside it.

If you're pregnant or breastfeeding, please contact our team for advice before use.

Our verdict

INhance Post-Injection Serum is a purpose-built aftercare step rather than a general-purpose serum — its cooling applicator and peptide-botanical formula make sense specifically in the days around an injectable or energy-based treatment. It's not a substitute for your practitioner's own aftercare advice, but as a dedicated recovery product it fills a genuine gap most routines don't otherwise cover.

FAQs

How soon after treatment can I use INhance?

Timing depends on the specific procedure and your clinician's protocol, so we'd always follow the aftercare instructions given by whoever carried out your treatment rather than a general rule.

Can I use INhance on its own, without other Alastin products?

Yes — it's formulated as a standalone aftercare step and doesn't require the rest of the TriHex Technology® range, though it can be layered into a wider routine once your clinician confirms it's appropriate to resume normal skincare.

Is INhance the same as Regenerating Skin Nectar?

No. INhance is formulated specifically for the post-procedure window, while Regenerating Skin Nectar is a broader everyday TriHex Technology® serum. See our full comparison for how they differ.

Is it safe to use during pregnancy?

If you're pregnant or breastfeeding, please contact our team for advice before use.