We would suggest to conduct "VOLUME-2" study, as an extension of the ongoing "VOLUME" study with all subjects already included. After completion of VOLUME study, the study will be directly extend with an "open-label design". All participants, who agreed to pursue, with either "Placebo" or "CG428", will receive CG428 treatment for an additional six-month period. VOLUME-2 study would be ideal and timely by enabling no interruption of product use. The Primary Objective is to observe for a longer period the efficacy of CG428 (12 months : 6months Volume + 6 months Volume-2) in order to better discriminate later or non-responder populations. Secondary Objectives are : * Evaluate how far CG428 can improve hair-pattern (reach a plateau or constant progression) * Evaluate motivation and adherence of subjects * Long term safety
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Hair thickness
Timeframe: 6 months after intervention