The CIEH report references commonly used legislation to regulate non-surgical cosmetic procedures. There are various pieces of legislation, with significant local variation. This includes:

The consultation is hosted via an online platform owned by SurveyOptic, who are a contracted supplier of DHSC. SurveyOptic will delete any personal data in line with the retention and disposal periods outlined below, or earlier if instructed to do so by DHSC.

However, the link between particle size and important parameters such as the elastic and viscous moduli, or long‐term performance, is not obvious.

Across the studies reported in the literature, it is clear that the viscoelastic properties vary substantially between products. Many factors can explain these differences: HA concentration, molecular weight, crosslinking technology and amount of free HA present in the final product.

Non-ablative lasers cause controlled tissue injury in the dermis but leave the epidermis intact. Fully ablative lasers completely remove the epidermis and some of the dermis by vaporising skin cells.

Licensed aesthetic practitioners must have relevant oversight by a named regulated healthcare professional (who has gained an accredited qualification to prescribe, administer and supervise aesthetic procedures).

Data about respondents’ job role, work location, age, sex and gender, qualifications, data on organisations that respondents may be responding on behalf of, and information on any non-surgical cosmetic procedures they have undergone will be used in the analysis of the consultation to help the department understand how people from different groups respond to the consultation’s proposals.

A strong correlation between “dilution durability” and gel‐to‐fluid ratio was observed: the more fluid (i.e., soluble HA) in the product, the higher extent to which the product can swell before phase separation occurs.

It should be noted that this is the first consultation on the licensing scheme. In this consultation, we are seeking views on:

Red: procedures with the highest risk of complications. In line with the proposal on CQC regulation of cosmetic procedures outlined above, bringing specified high-risk procedures into CQC regulation, so that they fall outside of the scope of the here licensing scheme.

gel cohesion is the sum of internal forces that unite the solid and liquid phases; if a gel is cohesive, then the gel remains monophasic when placed in an aqueous solution. Fagien et al.

The Health and Care Act 2022 included definitions of those procedures considered to have the highest potential to cause harm, while also allowing flexibility for new procedures to be covered through regulations in the future. The drafting of the act is as follows:

Permanent or dissolvable threads are inserted underneath the skin of the face to tighten it, induce collagen production and define facial contours.

The proprietary crosslinking technology of the HA gels influence the gel properties in many ways. Dermal fillers discussed in this review have been manufactured using three different methods: Resilient Hyaluronic Acid (RHA®),