Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

189 questions · 191 findings · 14 reviews

No studies found 50 · 26.2%GRADE not reported 1 · 0.5%Very low 48 · 25.1%Low 52 · 27.2%Moderate 30 · 15.7%High 10 · 5.2%

Glycolic acid (alpha‐hydroxy acid) vs salicylic‐mandelic acid

Participants' global self‐assessment of acne improvement Fair to good improvement (long term: treatment duration > 8 weeks) · participants with acne

Glycolic acid (alpha‐hydroxy acid) showed no clear difference in participants' global self‐assessment of acne improvement Fair to… compared with salicylic‐mandelic acid (low certainty).

1 finding from 1 review

Glycolic acid (alpha‐hydroxy acid) vs salicylic‐mandelic acid

Minor adverse events · participants with acne

It is very uncertain whether glycolic acid (alpha‐hydroxy acid) changes total number of participants who experienced at least one minor… compared with salicylic‐mandelic acid (very low certainty).

1 finding from 1 review

Azelaic acid vs adapalene

Participants' global self‐assessment of acne improvement · participants with acne

It is very uncertain whether azelaic acid changes participants' global self‐assessment of acne improvement Improved to… compared with adapalene (very low certainty).

1 finding from 1 review

Azelaic acid vs tretinoin

Participants' global self‐assessment of acne improvement Good to excellent improvement (long term: treatment duration > 8 weeks) · participants with acne

Azelaic acid showed no clear difference in participants' global self‐assessment of acne improvement Good to… compared with tretinoin (moderate certainty).

1 finding from 1 review

Azelaic acid vs benzoyl peroxide

Participants' global self‐assessment of acne improvement Good or very good improvement (long term: treatment duration > 8 weeks) · participants with acne

Azelaic acid probably leads to lower participants' global self‐assessment of acne improvement Good or… compared with benzoyl peroxide (moderate certainty).

1 finding from 1 review