The Journal
Research-backed articles on lipid science, oral care, skincare and the ingredients behind every CallNature formula.
Dental Health
Can Dry Skin Cause Acne? How a Stripped Barrier Clogs Pores — and the Routine That Helps Both
⚡ Quick Answer: Yes — dry skin can cause acne. Breakouts start when dead skin cells stop shedding evenly and plug a pore, forming an invisible microcomedone weeks before any visibl…
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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
Quick answer Horizontal neck lines are creases where thin, sun-worn skin folds in the same place again and aga…
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…
Skin / Anti-aging
Why Do I Have Horizontal Lines Across My Forehead? The 4 Causes — and the Eyelid Clue Most Guides Skip
Horizontal forehead lines come from the frontalis muscle, sun damage — or from lifting your brows to hold up h…
Dental Health
Does Mouthwash Raise Your Blood Pressure? What the Human Trials Found — and Which Rinses Actually Matter
Antiseptic mouthwash raised systolic blood pressure by about 2–3.5 mmHg in small trials. See which rinse ingre…
Nails
Why Do My Nails Curve Down at the Tips? Normal Curve, Ageing or Clubbing — the 3-Check Side-View Test
Nails curving down at the tips can be a harmless family trait, normal ageing or clubbing. The 3-check side-vie…
Scars & Stretch Marks
Why Is My Scar White? Pale, Depigmented or Something Else — the 3-Question Check, and What Colour Can Realistically Come Back
A white scar means the pigment cells in that spot were injured or lost. Pale vs milk-white, the 3-question che…
Skin / Anti-aging
Is Dimethicone Bad for Your Skin? Why “Suffocating” Is a Myth — and a Label Decoder for Every Silicone Name
Does silicone suffocate or clog skin? What the safety review and human tests show about dimethicone, where the…
Scars & Stretch Marks
Does Onion Extract Actually Work on Scars? Why It’s Listed as an “Inactive” Ingredient — and What 13 Trials Found
Onion extract scar gels beat doing nothing in short trials but not other topicals. See what the label, FDA rul…
Dental Health
Can Stress Really Cause Gum Disease? The 5 Pathways From a Hard Month to Bleeding Gums — and the Two-Minute Floor That Protects You
Stress doesn't cause gum disease on its own — plaque does. The 5 pathways a hard month uses to reach your gums…
Skin / Anti-aging
Do Natural Peptides in Skincare Actually Work? What a Peptide Cream Can Change, What It Can't — and What 'Natural' Really Means
What peptides can do for your skin, what 'natural peptides' really means on a label, how long results take — a…
Skin / Anti-aging
Is Plant-Based Hyaluronic Acid Really Made From Plants? What Vegan HA Actually Is — and How to Read the Label
Most plant-based hyaluronic acid isn't extracted from plants — it's the same molecule, brewed by fermentation.…
Skin / Anti-aging
Why Is the Skin Under My Eyes Crepey? Thin, Slack or Hollow — the 3-Check Mirror Test That Tells You Which
Crepey under-eye skin is thin skin, slack skin or lost volume — and each needs a different fix. Try the 3-chec…