DermaColumn DermaColumn

Recent dermatology research

These are not columns written by doctors. The editorial team reads studies published in medical journals and summarises them, giving the journal, the citation and what the study could not answer. Where a claim you have seen in advertising is involved, we say how far the research actually goes.

Wegovy Wegovy · GLP-1
GLP-1 · hair loss

Does Wegovy cause hair loss? Reading the BMJ study

A July 2026 BMJ study found more hair-loss diagnoses among people taking GLP-1 drugs. The condition is uncommon to begin with, so absolute numbers stayed small, and the cohort was people with type 2 diabetes.

BMJ · 2026 Jul 22;394:e100077
Exosome Exosomes
Exosomes · microneedling

Exosome treatments: how far does the evidence actually go?

A April 2026 systematic review, read in full. Eight studies, 171 participants in total. Skin ageing and pigmentation produced measured differences; acne and pores rested on case reports of three patients each.

Journal of Cosmetic Dermatology · 2026 Apr;25(4):e70881
Polynucleotide Polynucleotide · filler
Tear trough · fillers

Hollow under-eyes: filler or a regenerative injectable?

A June 2026 comparative review. Hyaluronic acid is better at filling a lost space; polynucleotide is better at the texture and firmness of the skin itself.

Journal of Clinical Medicine · 2026 Jun 26;15(13):4971
RFMicroneedling RF microneedling
RF microneedling

RF microneedling: what changed over four weeks

A July 2026 prospective study. Twenty participants followed for 28 days. Wrinkles and elasticity improved, while hydration dropped early before recovering.

Annals of Medicine · 2026 Dec;58(1):2708398
Subcision Subcision · PRP
Acne scars

Atrophic acne scars: subcision combined with PRP

A 2026 study. Forty-four patients received three sessions at four-week intervals; 96% showed a good or better response. There was no control group.

Skin Health and Disease · 2026 May 26;6(4):477-484
Midfacevolume Weight loss · facial volume
GLP-1 · midfacial volume

How much facial volume goes with 10 kg of weight loss?

A study published in an American otolaryngology journal in August 2025. CT and MR imaging from 20 patients was compared before and after a GLP-1 prescription, and midfacial volume fell by about 7% for every 10 kg lost.

Otolaryngology-Head and Neck Surgery · 2025 Aug
Melasma Melasma · laser toning
Melasma · laser toning

Why repeated toning leaves melasma unchanged

A randomised placebo-controlled trial published in an American dermatologic surgery journal in March 2026. Each face was split in two and only one side was treated with toning; both sides improved about equally.

Dermatologic Surgery · 2026 Mar 1
PIH Post-laser hyperpigmentation
Post-inflammatory hyperpigmentation

What actually prevents pigmentation after a laser

A systematic review published in an Australian dermatology journal in May 2025. Fourteen studies and 369 cases of pigmentation were collected, and the one measure that reduced occurrence itself was sunscreen.

Australasian Journal of Dermatology · 2025 May
Masseter Masseter botulinum toxin
Masseter botulinum toxin

What repeated masseter botulinum toxin does to chewing

A randomised triple-blinded trial published in Scientific Reports in June 2024. The group given a second injection at three months had a thinner masseter at six months, while measured chewing performance did not change in either group.

Scientific Reports · 2024 Jun 24;14:14561