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A firming serum is a leave-on skincare product formulated to support a firmer-looking, lifted appearance by hydrating the skin and supporting its surface over time. It is a cosmetic, not a treatment: it works on how the skin looks and feels, and it does not change the deeper structures that a facelift, HIFU, radiofrequency or threads act on.
Firmness comes from the support layer beneath the surface. A reference study of normal skin measured that skin collagen decreases with age, and that the amount of collagen tracks dermal thickness. Ultraviolet light adds to this: a review of the mechanisms of photoageing describes how sun exposure drives the breakdown of collagen and the build-up of damaged fibres, which is why sun-exposed skin loses firmness earlier than covered skin. See why skin sags and how to firm it for the causes in detail.
So what is a firming serum designed to do? Three things: keep the surface well hydrated, which on its own makes skin look smoother and more taut; deliver plant-based actives that are designed to support the skin as it maintains itself; and give the result of a procedure a daily routine to live in. What it is not designed to do is replace a procedure. If you have noticeable laxity or jowling, a serum is the maintenance step, not the lift.
That is how the True Glow Ultimate Facelift Serum is positioned on this page: Step 2 of the ritual, for daily maintenance after the Post Laser Intensive Recovery Serum has done its work in the first days after treatment.

The directions on this page are short: begin 2 days after your procedure, and use twice a day for ongoing maintenance. In practice the ritual runs like this.
Immediately after a laser, HIFU, Morpheus8, extraction or cleansing facial, the skin is reactive and the aim is calm and hydration. The recovery serum after laser is applied 2 to 3 times a day on its own during this window.
Once the surface has settled, the Ultimate Facelift Serum is added as Step 2, morning and evening. Apply a few drops to clean, dry skin, press and smooth outward across the cheeks, jawline and neck rather than rubbing, and let it absorb before moisturiser and, in the morning, sunscreen. Keep the recovery serum going for as long as your clinic advises.
Lifting treatments are usually repeated, and the serum is intended to be used continuously between them, not only in the fortnight afterwards. Our guides to recovery after HIFU and maintaining a non-surgical facelift cover the timeline for each treatment.
The serum can also be used on its own, twice a day, as a maintenance step for skin that is starting to lose bounce. Judge it over weeks of consistent use, not days.

These are general points, whichever product you choose.
For his own patients, Dr Sin Yong chooses the RAI True Glow Post Laser Intensive Recovery Serum and Ultimate Facelift Serum for recovery and lifting. After a non-surgical lifting treatment he uses the Intensive Recovery Serum first, and the Ultimate Facelift Serum is then used twice daily for maintenance. For patients having HIFU or skin-tightening sessions, he recommends the Ultimate Facelift Serum to maintain firmness between sessions.
A firming serum is a leave-on product formulated to support a firmer-looking, more lifted appearance through hydration and plant-based actives applied daily. It is a cosmetic, so it works on the look and feel of the surface rather than the deeper tissue a procedure treats. Use it consistently, twice a day, alongside daily sunscreen.
Within its limits, yes: a well-formulated serum used twice daily can make skin look smoother, more hydrated and more taut, and it gives the result of a lifting treatment a routine to live in. It will not lift noticeable laxity on its own. If sagging is your main concern, book an assessment before deciding on products.
Energy-based procedures such as HIFU, radiofrequency and lasers act on the deeper support layer and change firmness faster than any serum, with results usually judged at two to three months. A serum is the daily maintenance step around those treatments, not a faster alternative. Discuss which option suits you with your treating doctor.
No. A serum is a cosmetic that supports the appearance of the skin's surface; a facelift, HIFU or radiofrequency treatment changes the structures underneath it. The sensible way to think about the Ultimate Facelift Serum is as Step 2 of the ritual that maintains a procedure's result. Follow your treating doctor's instructions on timing.
The directions on this page say to begin 2 days after your procedure and use it twice a day for ongoing maintenance. For the first 2 days use only the Post Laser Intensive Recovery Serum, 2 to 3 times a day. If your skin is still raw or weeping at day 2, wait. Follow your treating doctor's instructions.