The Journal
Research-backed articles on lipid science, oral care, skincare and the ingredients behind every CallNature formula.
Dental Health
Can Gum Disease Cause High Blood Pressure? What the Link Really Is — and the Two-Way Street With Your Meds
Gum disease and high blood pressure often travel together. What the link really is, what gum treatment can and can't change — and the meds that affect gums.…
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Dental Health
Does Vaping Cause Bad Breath? What Three Studies Found — and What None of Them Measured
Does vaping cause bad breath? One 7,973-person survey says higher odds, a small pilot says no smoke smell, and…
Skin / Anti-aging
Why Am I Getting Jowls? Bone, Fat, Ligament or Skin — the 3-Check Jawline Test and What Each Layer Actually Responds To
Jowls form from four layers: bone, fat, ligaments and skin. Try the 3-check jawline test, then see what trials…
Dental Health
Is a Hydrogen Peroxide Rinse Safe for Your Gums? The 1:1 Dilution Rule, the 7-Day Limit — and What the Fizz Really Means
Diluted to 1–1.5% and kept to a week, a peroxide rinse is generally safe. Get the 1:1 dilution math, the 7-day…
Nails
Why Are My Nails Thin and Peeling After Gel Polish? Where the Damage Really Comes From — and the 3-Question Triage
Nails thin and peeling after gel? What a 2,118-person survey found, where AAD and Cleveland Clinic disagree on…
Nails
Are UV Nail Lamps Safe? What the Gel-Manicure Studies Actually Measured — and the 5-Step Hand-Protection Routine
UV nail lamps emit UVA, and a 2023 cell study found DNA damage. Here is what each study really measured, who s…
Scars & Stretch Marks
Why Does My Scar Hurt When the Weather Changes? What the Weather Studies Show — and the 4-Week Log That Finds Your Trigger
Scar aches in cold or damp weather are common, but the science is thin. What the weather-pain and cold-intoler…
Dental Health
Do Electric Toothbrushes Really Help With Gum Disease? What the Evidence Shows, Which Features Matter — and What the Motor Can't Do
Electric toothbrushes help gums in trials — modestly. What the evidence shows, the features that matter (press…
Dental Health
Do Face Mists Actually Work? The 3 Jobs a Spritz Does Well — and the Seal-It-or-Lose-It Rule
Face mists do work — for quick comfort, makeup refresh and damp-skin prep. What a spritz can't do, how to choo…
Dental Health
Is Jojoba Oil Really Similar to Your Skin's Sebum? Why It's Technically a Wax — and What That Actually Does for Your Skin
Jojoba isn't a true oil — it's liquid wax esters, the same family as part of your skin's sebum. What that real…
Dental Health
Can Dry Skin Cause Acne? How a Stripped Barrier Clogs Pores — and the Routine That Helps Both
Yes — dry skin can break out. See how a stripped barrier clogs pores, why over-washing feeds the cycle, and th…
Skin / Anti-aging
Why Do I Have Horizontal Lines on My Neck? Fold, Sun Damage or Both — the 3-Check Mirror Test That Tells You Which
Horizontal neck lines come from thin skin, sun and repeated folding. Try the 3-check mirror test, then see wha…
Scars & Stretch Marks
Why Is My Scar Numb? Will the Feeling Come Back — What Studies Show at 6 Months and 2 Years
A numb scar is usually cut skin nerves, not damage. In one study the numb patch shrank about 70–77% by 6 month…
Dental Health
Do Tongue Scrapers Really Work? The Honest Benefits, the Gag-Free Technique — and What a Scraper Can't Fix
Do tongue scrapers really work? What the coating is, what a Cochrane review found, the gag-free technique — an…
Dental Health
Can Treating Gum Disease Lower Your Blood Sugar? What 35 Trials Found — and What a 0.4-Point A1c Drop Really Means
Does a deep cleaning lower A1c? A 2022 Cochrane review of 35 trials found about a 0.43-point drop at 3–4 month…
Scars & Stretch Marks
Why Does My Scar Feel Tight or Pulling? Normal Tightening, a “Stuck” Scar or Contracture — the 3-Test Check
A tight, pulling scar is common while it matures — but over a joint it can limit movement. The 3-test check, w…
Nails
Why Do My Cuticles Grow Over My Nails? Cuticle, Nail Fold or Pterygium — the 4-Look Check, and Why Cutting Isn’t the Answer
Why do cuticles grow over your nails? The cuticle, the nail fold and a pterygium are three different things — …
Nails
Why Do My Nails Break More in Winter? What the Evidence Really Shows — and the 30–50% Humidity Check Most Guides Skip
Do nails really break more in winter? A 2026 study, nail-water science and dermatologist advice sorted into wh…
Nails
Is Dip Powder Worse for Your Nails Than Gel? What’s Actually in the Jar — and the Double-Dip Rule
Dip powder vs gel: what the jar contains, why damage comes from prep and removal, the allergy and shared-pot r…
Dental Health
Why Does My Breath Smell After a Tooth Extraction? Healing, Food Trap, Dry Socket or Infection — the Day-by-Day Check
Bad breath after a tooth extraction? Odour alone can’t tell healing from dry socket or infection — the pain tr…
Dental Health
Can Diet Really Improve Gum Health? The 3 Dials Your Menu Controls — and Why Sugar Timing Matters More Than Sugar Amount
Can diet improve gum health? Food can't remove plaque — but sugar timing, saliva, and repair nutrients like vi…
Dental Health
Why Are My Gums Pale or White? The 6 Patterns — and the Wipe-and-Spread Test That Shows Which Need a Doctor
Pale or white gums: the 6 patterns — natural variation, anaemia, thrush, lichen planus, leukoplakia and hormon…
Dental Health
Does Dry Skin Cause Itching? Why Dryness Lowers Your Itch Threshold — and How to Break the Itch-Scratch Cycle
Dry skin is one of the most common causes of itch. Why a parched surface makes nerves fire at a light touch, w…
Dental Health
Can You Remineralize Teeth Naturally? What Re-Hardens, What Doesn't — and the Daily Plan That Tips the Balance
Early enamel softening can re-harden — a cavity can't. The daily plan that tips the balance: acid timing, sali…