Efficacy of subcutaneous injection of platelet-rich plasma in alopecia: A clinical and histological pilot study on a rat model with a six-month long-term follow-up experience.

Purpose: To assess the potential of platelet-rich plasma (PRP) subcutaneous injection of to treat alopecia and to evaluate local toxicity.

Materials-methods: Twelve Hairless rats were used. At D0, we performed systematic clinical examination and divided the rat back into four quadrants (Q).