Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

10 questions · 10 findings · 1 reviews · Skin

No studies found 3 · 30%GRADE not reported 0 · 0%Very low 2 · 20%Low 3 · 30%Moderate 2 · 20%High 0 · 0%

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

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

Azelaic acid vs clindamycin

Participants' global self‐assessment of acne improvement Good or very good 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 or… compared with clindamycin (low certainty).

1 finding from 1 review

Salicylic acid vs tretinoin

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

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

1 finding from 1 review

Salicylic acid vs pyruvic acid

Participants' global self‐assessment of acne improvement Good to excellent improvement (medium term: treatment duration from 5 to 8 weeks) · participants with acne

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

1 finding from 1 review