Begin with the cause of hair loss
Androgenetic alopecia, sudden diffuse shedding and inflammatory scalp disease are different research questions. A study of androgenetic alopecia should not be generalized to every form of hair loss. The first consultation goal is to clarify the diagnosis and compare available options.
How should positive signals be read?
A 2025 study in 16 men followed a topical preparation after microneedling for up to 12 months and reported increased hair density. Without a control arm, the EV preparation’s contribution cannot be isolated.
Another pilot randomized trial in 20 men compared a formulation containing plant extracts with placebo. Its result belongs to that mixture; it does not validate all human-cell-derived EV products. A 2025 systematic review also highlights differences in sources, preparation and follow-up that limit comparisons.
What would demonstrate progress?
Larger research should contribute more than additional before-and-after photographs. Fixed-area hair counts, blinded assessment, recording of concurrent treatment and adequate follow-up help establish the size of an effect. A defined preparation is essential for reproducibility.
This field has potential to develop new supportive options. Translating that potential into an individual care decision depends on the diagnosis and human evidence for the specific preparation.