Injections for Redness After Acne: What a Split-Face Trial Tested

A procedure offered for redness after acne should be assessed against that goal. Ask what the clinician has diagnosed and which evidence concerns the proposed product. The words “hyaluronic acid” alone do not tell you whether a study tested an injection, a topical serum or a treatment for a different concern.

What the split-face trial tested

Zhang and colleagues' May 2026 Beijing trial enrolled 25 people; 23 completed treatment, including 19 women. Completers were aged 18–30. Active acne was excluded. One facial side received three Hi Body 2.5 injection sessions four weeks apart; the other was untreated. The formulation included non-cross-linked hyaluronic acid, L-carnosine, amino acids and vitamins. [1]

At week 12, four weeks after the final session, mean clinician redness scores were 1.8 on the treated side and 2.3 on the control side, P=0.042, on a 0–4 scale. This does not isolate hyaluronic acid from the mixture or procedure. [1]

All participants experienced temporary treatment-related redness, usually resolving within one to three days. No serious adverse events were reported. Two participants withdrew after acne relapse. The small study had no sham injection and cannot establish GLP-1-related facial-volume restoration. Beijing and national Chinese science foundations funded it; authors declared no conflicts. [1]

Identify the change before choosing the procedure

The American Academy of Dermatology distinguishes flat color changes left after acne from scars with changes in skin structure. It explains that acne scars may be depressed or raised and that discoloration can fade while a scar remains. [2]

Point out each area you want assessed. Ask whether it is lingering redness, pigmentation, active acne, a scar or another condition. Describe when it appeared and whether it changes, hurts or develops new bumps. Do not assume that a procedure described for redness also treats an indentation or a change in facial contour.

Our acne-scar assessment guide covers naming the mark before selecting treatment. If the concern developed during GLP-1 care, bring that treatment timeline without treating timing alone as a diagnosis.

Ask what is in the proposed injectable

Request the product name, manufacturer, full ingredients and patient information before paying for a course. Ask the clinician to explain whether the product and treatment purpose match the cited research, and which local authorization or prescribing arrangements apply. The study above does not answer the status of a different product in your country.

Ask what the clinician expects to change and how it will be measured. For redness, a dated clinical assessment may answer a different question from a general claim that skin looks better. Confirm when the review occurs relative to the final session, and how the plan changes if new acne appears.

Obtain the full price and the arrangements if treatment is deferred or stopped. A discounted package should still identify each procedure, the follow-up included and who answers questions afterward.

Check the procedure and follow-up arrangements

CDC states that needles and syringes must never be reused between patients. A single-dose vial is for one patient for one procedure or injection; accessing a multi-dose vial requires a new needle and syringe to prevent contamination. [3]

Ask how the clinic handles injection equipment and medication containers, who performs the procedure and who provides the clinical assessment. Keep the complete product details with the procedure date and treating professional's contact information.

Before proceeding, request written aftercare and instructions for a symptom that needs prompt assessment. Ask which changes are expected, how long they should last and whom to contact outside office hours. Follow the instructions given for your procedure rather than copying a study's injection settings or aftercare onto another product.

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This article provides general education, not a diagnosis or an individual treatment plan. Medication information refers to US sources. Discuss medication, nutrition and cosmetic treatment decisions with qualified clinicians.