: Does Mederma for scar removal really work? I've heard both good and bad things about Mederma. They claim to be the most recommended product (by doctors and pharmacists) for scar removal but my dermatologist said that there's

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From what I found they may have some benfit on the appearance of scars. But the info available is contradictory.

It is featured in a article on ncbi.nlh.nih.org called: Snake oil for the 21st century

Effect of Mederma on hypertrophic scarring in the rabbit ear model

Improvement in dermal organization of collagen
No significant difference in dermal vascularity or inflammation

Computer analysis of the scar photographs demonstrated no significant
reduction in scar erythema with Mederma treatment

A New Proprietary Onion Extract Gel Improves the Appearance of New Scars

once-daily application of the proprietary advanced formulation of
onion extract gel is safe for use on new scars and significantly
improves their overall appearance, redness, softness, and smoothness
compared to control scars.

Hypertrophic Scarring and Keloids: Pathomechanisms and Current and Emerging Treatment Strategies

States that available data is contradictory

A comprehensive evidence-based review on the role of topicals and dressings in the management of skin scarring

Two randomised studies by Draelos in 2008 (n = 60) and 2012 (n = 44),
following shave excision of seborrheic keratoses, concluded that
Mederma® improved the appearance, signs and symptoms of the healed
wounds compared with untreated controls [42, 43]; however, both these
studies note that funding was provided by the manufacturer Merz
Pharmaceuticals.

As for the Amazon product I cannot find where it was sponsored or approved for safety.