The Journal
Research-backed articles on lipid science, oral care, skincare and the ingredients behind every CallNature formula.
Scars & Stretch Marks
Can You Massage a Scar Too Much? The Blanch Test — and the 5 Signs You're Overdoing It
By S. C. Aris about the author Last updated: 18 August 2026 Quick answer Yes — a scar can be massaged too much, and there are three separate ways to overdo it. Too soon (on a scar …
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Dental Health
Is Alcohol-Free Mouthwash as Effective as Regular Mouthwash?
⚡ Quick Answer: For everyday use, an alcohol-free mouthwash works just as well as a regular one — provided the…
Nails
Why Do I Have a Ridge Down the Middle of My Thumbnail? The 3 Causes — and the 10-Second Side-Ridge Test
By S. C. Aris about the author Last updated: August 17, 2026 Quick Answer A groove running down the centre of …
Dental Health
How Do You Soothe Sore Gums at Home? A Simple Step-by-Step Plan
⚡ Quick Answer: To soothe sore gums at home, clean them gently but thoroughly — a soft-bristled brush angled 4…
Dental Health
What Does the Start of Receding Gums Look Like? The 4 Subtle Signs Most People Miss
⚡ Quick Answer: The start of receding gums looks like four subtle changes, usually on the canines and premolar…
Skin / Anti-aging
Is Phenoxyethanol Bad for Your Skin? The 1% Rule — and How to Read the Dose Off the Label
Quick Answer For almost everyone, no. Phenoxyethanol is a preservative, and the two bodies that have formally …
Dental Health
Why Is My Mouthwash Staining My Teeth Brown? How to Tell Which Ingredient Is Doing It
Quick Answer Two mouthwash ingredients are documented causes of brown tooth staining: chlorhexidine gluconate …
Skin / Anti-aging
Why Are My Pores Getting Bigger as I Get Older? (The Round-vs-Teardrop Test)
By S. C. Aris about the author Last updated: 14 August 2026 Quick answer Your pores are almost certainly not g…
Dental Health
Are My Bleeding Gums Hormonal — or Gum Disease? The Two-Cycle Test That Tells Them Apart
⚡ Quick Answer: Bleeding gums are hormonal when the bleeding rises and falls with your cycle and returns to a …
Scars & Stretch Marks
Do Silicone Scar Sheets Work on Old Scars? The Redness Test That Tells You
By S. C. Aris about the author Last updated: August 11, 2026 Quick answer Silicone sheets have their best-docu…
Nails
Why Do I Keep Getting Hangnails? The Real Causes — and How to Break the Cycle
⚡ Quick Answer: Recurring hangnails are rarely bad luck they're a skin-barrier problem. A hangnail is a small …
Skin / Anti-aging
Is “Fragrance” in Skincare Bad for Your Skin? What “Parfum” on the Label Actually Hides
By S. C. Aris about the author Last updated: August 8, 2026 Quick Answer Not for most people — but the label i…
Skin / Anti-aging
Can You Use Retinol on Stretch Marks While Pregnant? What the Evidence Actually Says
By S. C. Aris about the author Last updated: August 9, 2026 Quick Answer The standard advice is to avoid it, a…
Skin / Anti-aging
Do Face Oils Actually Absorb Into Your Skin — or Just Sit on Top? What Penetration Studies Show
By S. C. Aris about the author Last updated: August 7, 2026 Quick Answer Both — and it depends on the oil. Pee…
Dental Health
Why Does My Breath Smell With Clear Aligners or a Retainer? The 60-Second Test
By S. C. Aris about the author Last updated: 6 August 2026 Quick Answer If your breath smells since you starte…
Dental Health
Why Did My Gums Start Bleeding After I Quit Smoking? (The Unmasking Effect)
By S. C. Aris about the author Last updated: 5 August 2026 Quick answer If your gums started bleeding in the w…
Scars & Stretch Marks
Can You Use Scar Oil and Silicone Gel Together? The Order That Actually Works
Quick answer Yes but not stacked on top of each other in the same moment. Silicone gel and silicone sheeting d…
Nails
Are White Spots on Your Nails Really a Calcium Deficiency? What They Actually Mean
⚡ Quick Answer: Almost certainly not. Despite one of the most persistent myths in nail care, white spots on yo…
Nails
Is "10-Free" Nail Polish Actually Safer? What the Numbers Mean — and What Was Really in the Bottles
Quick Answer 10-Free is a marketing claim, not a regulated standard there is no legal definition of it anywher…
Skin / Anti-aging
Why Is My Chest Crepey When My Face Isn't? (The "Thinner Skin" Myth, and What's Really Going On)
By S. C. Aris about the author Last updated: 31 July 2026 Quick answer If your face still looks smooth but you…
Scars & Stretch Marks
Why Does My Silicone Scar Sheet Itch? What's Actually In It — and What the Redness Means
Quick answer An itch under a silicone scar sheet is common, and in most cases it is not an allergy to silicone…
Skin / Anti-aging
Why Do My Fine Lines Look Worse at the End of the Day? (And How to Tell If They're Really Wrinkles)
Quick answer If a line looks shallower at 8am and deeper at 8pm, that line is being driven mostly by water not…
Dental Health
Why Does My Floss Smell Bad in One Spot? The 4 Real Causes
By S. C. Aris about the author Last updated: 30 July 2026 Quick answer If your floss smells bad in one specifi…
Dental Health
Why Do My Gums Look Like an Orange Peel? What Gum Stippling Really Means
Quick answer That fine, dimpled, orange-peel texture on your gums has a name: gingival stippling . It is a nor…