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This is not a reason to dismiss the studies, but it is a reason to read them critically: several trials were funded or conducted by companies with a commercial interest in the result, sample sizes are typically in the dozens, follow-up rarely extends beyond a few months, and publication bias toward positive cosmetic outcomes is a recognized concern

So we all know how brutal the Texas heat is, Coufal said

Studies with unclear experimental methods, insufficient sample sizes, or unvalidated outcome measures were excluded for quality filtering

Many patients report increased hair fall a few months after starting treatment

C., Yin, M

That post-acne spot hangs on