Journal September 26, 2026 6 min read

How Is Microneedling Measured?

Microneedling is measured through clinical scoring indices, histological endpoints, and device parameters. This page summarises how those measurements are defined and applied in registered research studies.

peptides-pro Editorial

Microneedling is formally described in the research literature as a minimally invasive procedure in which fine needles create controlled micro-injuries in the skin or mucosa. It is also referred to as percutaneous collagen induction, microneedling therapy, or fractional microneedling when the injury pattern is deliberately spaced. The procedure is a technique rather than a compound, so it has no sequence, formula, or molecular weight. What is measured instead are the clinical, histological, and device-related variables that the technique is intended to change. In registered trials, those variables include validated severity scores, tissue-level growth factor concentrations, and physical device parameters such as needle length and treatment interval [1][2][6].

The pathway most often examined in this work is the wound-healing cascade, with particular attention to platelet-derived growth factor (PDGF) and connective tissue growth factor (CTGF) as markers of the fibrotic and remodelling response [6].

Research Studies

Microneedling and tranexamic acid in striae rubra

A registered trial evaluates microneedling with topical tranexamic acid versus microneedling with placebo in striae rubra. One side of the affected area receives topical tranexamic acid at 100 mg/mL followed by a microneedling session; the contralateral side receives 0.9% normal saline followed by microneedling performed in the same manner. Sessions are conducted every three weeks, up to a maximum of five sessions. The split-side design allows each participant to serve as their own control, which reduces between-subject variability in the measurement of striae severity [1].

Microneedling-assisted agents in melasma

A randomized, parallel-group trial compares microneedling-assisted topical metformin, topical tranexamic acid, and modified Kligman's formula against microneedling-assisted saline in adult women with melasma. Eighty participants are randomly assigned to one of four treatment groups. The primary outcome is the change in Melasma Area and Severity Index (MASI) score from baseline to the end of follow-up. MASI is a validated clinical scoring instrument, and its use as the primary endpoint illustrates how microneedling studies quantify change through ordinal severity scales rather than through direct tissue measurement [2].

Microneedling and glutathione gel in gingival depigmentation

A split-mouth clinical trial compares gingival depigmentation using microneedling alone versus microneedling with glutathione gel. The trial is framed around the colour of the gingiva as a determinant of smile aesthetics, and gingival depigmentation has gained popularity among periodontal plastic surgical procedures. The split-mouth design is used here for the same reason it is used in the striae trial: it permits within-subject comparison of treated and control sites [4].

Microneedling and hyaluronic acid in thin gingival phenotype

A trial evaluates microneedling alone versus microneedling with hyaluronic acid in thin gingival phenotype. The periodontal phenotype is defined as the combination of gingival phenotype and buccal bone plate thickness, and while the full periodontal phenotype cannot be fully assessed, gingival phenotype can be evaluated through a standard and reproducible method. Gingival recession is usually observed with trauma and inflammation in thin phenotypes, whereas pocket formation has been reported in thick phenotypes. Established soft tissue augmentation procedures include sub-epithelial connective tissue graft, free gingival graft, modified roll technique, and acellular dermal matrix, all of which carry drawbacks such as a second surgical site. This trial positions microneedling as an alternative measured against those established procedures [5].

Fractional microneedling radiofrequency and hypertrophic scars

A trial compares fractional microneedling radiofrequency versus intralesional steroid injection with and without microneedling, with respect to tissue levels of PDGF and CTGF in hypertrophic scars. This is a tissue-level endpoint rather than a clinical score, and it directly addresses the growth factor pathway named above. The comparison of a device-based intervention against a pharmacological injection, with and without microneedling as an adjunct, allows the contribution of the microneedling component itself to be isolated [6].

Microneedling and topical multivitamin serum

A study of topical multivitamin serum describes skin boosters as injectable and topical treatments designed to improve dermal quality and restore skin health. These products typically include hyaluronic acid formulations, biostimulatory agents, platelet-rich plasma, growth factors, and polynucleotides. One category of interest is polynucleotide-based therapies, most notably polydeoxyribonucleotide (PDRN), derived from the DNA of salmon or trout, which exhibits dual regenerative and anti-inflammatory properties and promotes tissue repair by supplying nucleotides essential for DNA synthesis. Where such a serum is applied after microneedling, the microneedling step functions as a delivery enhancement rather than as the measured intervention itself [3].

Comparison of measurement approaches

Study	Primary measurement	Design
Microneedling with tranexamic acid in striae rubra [1]	Clinical severity of striae rubra	Split-side, within-subject control
Microneedling-assisted agents in melasma [2]	Change in MASI score	Randomized, parallel-group, four arms
Microneedling with glutathione gel in gingival depigmentation [4]	Gingival colour	Split-mouth
Microneedling with hyaluronic acid in thin gingival phenotype [5]	Gingival phenotype parameters	Comparative clinical trial
Fractional microneedling RF in hypertrophic scars [6]	Tissue PDGF and CTGF levels	Comparative, with and without microneedling

Permeability and delivery measurement

An ex vivo evaluation of skin permeability enhancement used human-derived skin tissue models. The stratum corneum presents a significant barrier to transdermal delivery, and a cooling-assisted delivery device was developed to enhance skin penetration, with potential synergistic effects when combined with microneedling systems such as the Turtle pin (0.5 mm) and MTS (1.5 mm). This work is ex vivo and therefore does not establish in vivo clinical outcomes; it measures penetration rather than therapeutic effect [9].

Adjacent clinical contexts

Two further clinical investigations provide context for how skin endpoints are measured in this field. A multicenter clinical investigation evaluated complementary day and night serums in sensitive skin, a condition linked to oxidative stress, barrier dysfunction, and disrupted skin biorhythms, with the skin's daytime defense and nighttime repair cycles providing the rationale for temporally optimized formulations [7]. A separate review addresses practical therapeutic strategies for acne-induced hyperpigmentation across all skin types, noting that post-inflammatory hyperpigmentation and post-inflammatory erythema are common sequelae of acne, particularly in individuals with skin of colour, and that up to 85% of patients with Fitzpatrick phototypes IV-VI develop post-inflammatory hyperpigmentation following inflammatory acne lesions [8]. Neither of these is a microneedling study, and neither is used here to support a claim about microneedling outcomes.

If you are reading this for personal health reasons

The materials described on this page are sold for laboratory research only, and we do not provide dosing or medical guidance. Nothing here is a recommendation for use in humans. Anyone considering a compound or procedure for themselves should speak to a licensed clinician.