HRIPT · Study 26T-0706-18
Sting-Less Scar Gel: Clinically Tested With Zero Reactions to the Gel
- Clinically Tested
- Dermatologist Supervised
- Non-Irritant
- Hypoallergenic
Sting-Less Scar Gel is clinically tested for skin safety. We sent it to Evalulab, an independent clinical testing lab, for a Human Repeat Insult Patch Test (HRIPT). This is the standard test for whether a skincare product causes irritation or allergic reactions. Here's what they did and what they found.
- 52 adults completed the study
- 0 reactions to Scar Gel
- 520 skin readings, every one scored “no visible reaction”
The test
What is an HRIPT?
Skin allergies often don't appear the first time you use something. They build up with repeated use. So this test applies the product over and over, takes a break, and then applies it one more time to fresh skin to see if an allergy has developed.
An HRIPT checks two things:
-
Irritation
Does the product cause redness, swelling, or other damage where it touches the skin?
-
Sensitization
Does repeated contact cause the body to develop an allergy to it?
Method
How the study worked
-
3 weeks
Repeated exposure
Scar Gel was applied under a patch on each participant's upper back 3 times a week for 3 weeks, for a total of 9 applications. Each patch stayed on for 24 to 48 hours. Lab staff checked and scored the skin every time before a new patch went on.
-
10–20 days
Rest period
No product was applied. This gives the immune system time to develop a sensitivity if the product is going to cause one.
-
48 hours
Challenge patch
A final patch went on a new, untouched area of skin for 48 hours. Then lab staff removed it and examined the skin. A reaction at this stage is the classic sign of a developed allergy.
How skin was scored
Every reading for Scar Gel was 0.
Lab staff graded each patch site on a six-step scale, from no visible reaction to severe. Here is where all 520 Scar Gel readings landed.
Scar Gel readings
-
0+ Barely noticeable redness
-
01 Mild redness
-
02 Moderate redness with slight swelling
-
03 Marked redness, swelling, and small blisters
-
04 Severe redness, blisters, and open sores
Participants
Who was tested
Healthy men and women across a wide span of ages and every skin type on the Fitzpatrick scale.
Enrolled
52 of 55 completed
Completed Did not finish
Ages
20–84 years
Men and women, average age 52
Skin types
6 of 6 Fitzpatrick types
- I
- II
- III
- IV
- V
- VI
Very fair,
always burns
Deeply pigmented,
rarely burns
Findings
The results
-
0
Reactions to Scar Gel
No reactions to Scar Gel were observed at any point in the study.
-
0
Reactions to the control
No reactions to the Vaseline control were observed.
-
0
Severe adverse events
No severe adverse events occurred.
Final report
The lab's conclusion
“Under the conditions of the study described herein, the test product ‘Scar Gel (Sting-Less)’ has produced no signs of cutaneous irritation or skin sensitization. It is therefore considered non-irritant and hypo-allergenic.”
Because the study was supervised by a dermatologist, Scar Gel may carry the claim “Tested under the control of a dermatologist.”
The bottom line
Sting-Less Scar Gel is clinically tested and showed zero reactions across 52 adults, ages 20 to 84, on all six skin types.
Takeaways
What this means for you
What the results show
With repeated contact on healthy skin, across a wide range of ages and skin types, Scar Gel caused no irritation and no allergic response.
What the results don't show
- No test can guarantee that nobody will ever react. Anyone can be sensitive to any ingredient.
- If you have sensitive skin or known allergies, try a small area first.
- Always follow the directions on the tube.
For the record
Study details
- Study number
- 26T-0706-18
- Testing lab
- Evalulab Inc., Mont-Royal, Quebec, Canada
- Lab quality system
- ISO 9001 registered
- Supervising dermatologist
- Dr. Michel Journet, M.D., F.R.C.P.(C)
- Study dates
- July 6 to August 12, 2026
- Final report issued
- August 28, 2026
- Product lot tested
- 7319
- Study design
- Open-label, single site, conducted under Good Clinical Practice
- Ethics oversight
- Protocol and consent forms approved by an independent ethics committee
- Patch type
- Semi-occlusive, hypoallergenic medical-grade patch
- Control
- Pure Vaseline USP
Questions
FAQ
What does “clinically tested” mean for Scar Gel?
Scar Gel went through a supervised clinical study at an independent lab. 55 adults enrolled, 52 completed, and a dermatologist oversaw the results. The study tested for skin irritation and allergic reactions, and Scar Gel caused neither.
Who ran the test?
Evalulab Inc., an independent clinical testing lab in Quebec, Canada. A dermatologist, Dr. Michel Journet, M.D., F.R.C.P.(C), supervised the study and signed the report's summary.
What does “hypoallergenic” mean here?
It's the lab's conclusion based on the study: no participant developed an allergic reaction to Scar Gel. There's no single federal standard for the term in the U.S., so we're showing you the actual data behind it.
Was this a test of how well Scar Gel works on scars?
No. An HRIPT tests whether a product is gentle on healthy skin. It measures irritation and allergy potential, not results on scars.
Can I see the full report?
The original lab report lists personal information about the people who took part in the study, so we don't share copies of it. We created this page to show you the results while protecting the privacy of everyone who participated.
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