Pathologies

16 problèmes de santé avec recherche fondée sur les preuves en matière de compléments alimentairespathologies avec recherche fondée sur les preuves concernant les compléments alimentaires

We evaluate supplements across specific hair and scalp conditions. Each condition page ranks ingredients by evidence grade, helping you find what research actually supports for your particular concern.

How We Grade Evidence

Chaque page de pathologie classe les ingrédients de compléments selon la solidité des preuves cliniques. Voici la signification de chaque note :

Strong Evidence

Multiple randomized controlled trials (RCTs) or meta-analyses with consistent positive results and large sample sizes.

Good Evidence

At least one RCT with mostly consistent results across studies. Evidence suggests benefit but more research may be needed.

Some Evidence

Small studies or observational data with some positive signals. Promising but insufficient for strong recommendations.

Very Early Research

In vitro studies, case reports, or pilot studies only. Early-stage research that requires clinical validation.

Alopecia Areata

2% lifetime risk

Circular bald patches Exclamation point hairs Nail pitting

Alopécie Androgénétique

50% of men by age 50, 25% of women by age 50

Receding hairline Crown thinning Widening part +1

Alopécie de Traction

Common in certain hairstyle practices

Hairline recession Broken hairs Folliculitis

Amincissement Capillaire Lié à l'Âge

Near-universal over age 60

Gradual density reduction Finer hair texture Slower growth rate

Perte Capillaire Féminine

40% of women by age 50

Widening central part Diffuse crown thinning Preserved frontal hairline

Perte Capillaire Liée à la Thyroïde

4-10% of general population has thyroid dysfunction

Diffuse thinning Dry brittle hair Loss of outer eyebrows

Perte Capillaire Liée au Stress

Increasingly common; associated with telogen effluvium

Diffuse shedding Hair thinning Slower regrowth

Perte Capillaire par Carence en Fer

Affects up to 60% of premenopausal women with hair loss

Diffuse thinning Increased shedding Fatigue +1

Perte Capillaire par Carence Nutritionnelle

Common in restrictive diets and malabsorption conditions

Diffuse thinning Dry dull hair Slow growth +1

Perte Capillaire par Psoriasis du Cuir Chevelu

45-56% of psoriasis patients have scalp involvement

Thick scales Red patches Itching +1

Perte Capillaire Post-Partum

Affects 40-50% of women postpartum

Excessive shedding Thinning around temples Reduced hair density

Telogen Effluvium

Second most common cause of hair loss

Diffuse thinning Excessive shedding Reduced ponytail volume

Chemotherapy-Induced Hair Loss

Affects 65-85% of chemotherapy patients depending on regimen

Rapid diffuse shedding Complete scalp hair loss Eyebrow and eyelash loss +1

Hormonal Hair Changes (PCOS & Menopause)

PCOS affects 6-12% of women; menopause-related thinning affects 40%+ of postmenopausal women

Diffuse thinning Changes in hair texture Hirsutism (PCOS) +1

Brittle Hair and Nails Syndrome

Affects approximately 20% of the general population

Dry, splitting hair Increased breakage Brittle, peeling nails +1

Scalp Inflammation (Folliculitis & Dermatitis)

Seborrheic dermatitis affects 3-5% of adults; scalp involvement very common

Scalp redness Itching and flaking Pustules around follicles +1

Avertissement FDA: Ces déclarations n'ont pas été évaluées par la Food and Drug Administration. Les produits et informations sur ce site ne sont pas destinés à diagnostiquer, traiter, guérir ou prévenir quelque maladie que ce soit. Les notes de preuve présentées sont basées sur notre analyse de la recherche publiée et évaluée par des pairs et ne constituent pas un avis médical. Consultez toujours votre professionnel de santé avant de commencer tout régime de compléments alimentaires.