Mederma

Mederma Advanced Scar Gel with Allantoin.

Moisturizers

About this product

A topical scar treatment cream containing onion extract, allantoin, and sodium hyaluronate designed to help fade the appearance of scars.

Guru Score

51%

Nay

5 experts · Moderate agreement

What the gurus are saying

Fragrance in the formula risks irritating scars rather than improving them, and the active ingredients deliver mixed to underwhelming results compared to plain medical-grade silicone or silicone sheets. The bigger concern is that people with sensitive skin may be more likely to develop an allergic reaction to this cream than to see any real scar fading, so dermatologists generally suggest skipping it in favour of silicone-based options instead.

Synthesized from 5 expert reviews · most recent take July 2025

What they flagged

High risk of allergic contact dermatitis
Fragrance can irritate and worsen scars
Onion extract lacks proven scar benefit

Type

MoisturizersGel

Where to buy

Amazon → Google → iHerb →

Opens a store search. We may earn from these links.

Scan it in the shopFree iPhone app. Scores in the aisle.

What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored

The Budget Dermatologist

724k subs

✕Nay

"The fourth product I do not want you to buy is a fancy scar cream, Mederma or vitamin E or anything super fancy because again I think we have a theme here: allergic contact dermatitis. You are more likely to get an allergic reaction to this cream than any benefit you hope to be getting to fade your scar."

Dr. Daniel Sugai

722k subs

✕Nay

"I like this more than vitamin E or onion extract with Mederma, those have very mixed results to not impressive results."

Dr Dray

2.69M subs

✕Nay

"You'd be much better off with just the plain medical grade silicone"

All 3 takes from Dr Dray

*BEST* Skincare For Scars: Dermatologist's Picks

"You'd be much better off with just the plain medical grade silicone"

Dermatologist Approved Skincare From The Drugstore

"Mederma Advanced Scar Gel with Allantoin has the onion bulb extract which in theory is helpful for healing. It also has a dry quick dry oil in it with onion bulb extract as well along with a variety of other oils which are relevant and may help smooth the scar surface and cut down on frictional forces."

Drugstore Skincare NOT WORTH THE PRICE

"Mederma's Advanced Scar Gel has onion bulb extract. There's one small study looking at this that didn't really seem to make much of a difference. Allantoin is moisturizing though and a skin protectant but I would go with silicone that's more evidence-based."

Dr. Shereene Idriss

1.73M subs

✕Mixed

"Maderma also has allantoin in it I'm not sure the percentage of it something for you guys to look for"

Doctorly

3.59M subs

✕Nay

"There was a good paper that came out on the benefits of this onion extract that's in Mederma to help with scars. And then later on, they did the meta-analysis that analyzed Mederma and found that it probably does not have benefit. The benefits that people are probably seeing are just because they're keeping the wound moist rather than the actual onion extract doing something for the skin."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Frequently asked.

What is Mederma Advanced Scar Gel with Allantoin?

A topical scar treatment cream containing onion extract, allantoin, and sodium hyaluronate designed to help fade the appearance of scars.

Is Mederma Advanced Scar Gel with Allantoin worth it?

Mostly no. None of the 5 gurus who reviewed it came away sold, leaving it a Guru Score of 51%.

What is Mederma Advanced Scar Gel with Allantoin's Guru Score?

Mederma Advanced Scar Gel with Allantoin holds a Guru Score of 51%. That is our read on how warmly the experts talk about it, based on the verdicts of 5 expert reviewers we have collected.

Mederma Advanced Scar Gel with Allantoin.

51%

What the gurus are saying.

What the evidence says.

Frequently asked.

What is Mederma Advanced Scar Gel with Allantoin?

Is Mederma Advanced Scar Gel with Allantoin worth it?

What is Mederma Advanced Scar Gel with Allantoin's Guru Score?

Cheaper alternatives the gurus rate.

Similar products worth a look.

This product, in the news.

This week's top beauty news, in your inbox.