Clinical Trials

To fully substantiate our claims and results, all CULT51 products undergo fully independent clinical trials before launch. These are carried out by Princeton Consumer Research, a leading clinical testing facility with branches in the US and UK.

The full, in-depth details of our clinical trials and how they are conducted are outlined below. We invite you to explore and compare your own results against the outcome of our trials.

Study procedure

Full independent clinical testing was carried out by Princeton Consumer Research across a six-week period. All participants were selected by the test centre and were assessed at regular intervals throughout the trial: baseline, fifteen minutes (where claimed), one hour, twelve hours, four weeks and six weeks. CULT51 had no involvement in the trial from start to finish, to ensure a fair and unbiased outcome.

The results were measured using various medical instruments and thorough expert visual assessment.

All subjects were advised to discontinue use of any topical lightening or exfoliating products containing hydroquinone, glycolic acid, alpha-hydroxyl acids, salicylic acid, retinol, peptides and vitamin C (including derivatives) at least seven days prior to the study start date, and to wash the study site areas using only a simple soap product provided by the test centre.

Blind testing of products

The test products were labelled by the sponsor in a blinded fashion, using labels that provided usage instructions only. We sent all test products directly to the clinical facility prior to the start of the study, in compliance with current Good Manufacturing Practices.