Skin & Glow-up

1. Skin & Glow-upwell supported · human dataAdded 30 September 2026

   Eczema carries double the odds of depression and anxiety

   Adults with atopic dermatitis had roughly double the odds of depression and anxiety in pooled studies, and suicidal ideation was over four times more likely among adults and adolescents with the condition. Children with atopic dermatitis also showed higher odds of depression.

   ⚠What it shows: A consistent and sizeable link, but it comes from pooling studies that followed people rather than testing anything, so it cannot prove the skin condition causes the distress. The included studies also used differing definitions of depression and anxiety and rarely measured how severe the eczema was.Meta-analysis · J Am Acad Dermatol

   Full breakdown →Association of atopic dermatitis with depression, anxiety, and suicidal ideation in children and adults: A systematic review and meta-analysis. J Am Acad Dermatol 2018
2. Skin & Glow-uppreliminary · human dataAdded 27 September 2026

   Isotretinoin's depression link vanishes in two big health databases

   In cohort studies comparing 7195 isotretinoin users in Canada and 340 in the UK against acne patients on oral antibiotics, isotretinoin was not associated with increased risk of depression, psychosis, suicide or attempted suicide; relative risks were around 1.0.

   ⚠What it shows: Reassuring rather than final: researchers followed acne patients in two large health databases rather than testing the drug in a trial, comparing 7195 isotretinoin users in Canada and 340 in the UK against antibiotic users. Rare or small effects cannot be completely ruled out this way.Meta-analysis · Arch Dermatol

   Full breakdown →Isotretinoin use and risk of depression, psychotic symptoms, suicide, and attempted suicide. Arch Dermatol 2000
3. Skin & Glow-uppreliminary · human dataAdded 26 September 2026

   Probiotics did little for acne at 4 weeks, by 12 the picture changed

   Oral probiotics made only a slight difference to acne after 4 weeks, but by 12 weeks they had reduced severity grading and cut total lesion counts by an average of 10.4 versus control, in pooled results from randomised trials covering 623 patients.

   ⚠What it shows: Encouraging but thin: the results pool 9 trials with 623 people in total, and the improvement in severity scores only just scraped past chance, so larger trials could still shrink or erase the effect.Meta-analysis · Clin Exp Dermatol

   Full breakdown →Probiotics explained →Efficacy of oral probiotics in patients with acne: a systematic review and meta-analysis of randomized trials. Clin Exp Dermatol 2025
4. Skin & Glow-upwell supported · human dataAdded 25 September 2026

   Vitamin D pills eased eczema in trials of children and adults

   Across 11 randomised trials with 686 participants, vitamin D supplementation reduced the severity of atopic dermatitis in children and adults compared with control groups.

   ⚠What it shows: One of the better-tested supplement findings: results pooled from 11 trials in 686 children and adults all point the same broad way, though the trials differed somewhat from each other and the authors still want larger, longer studies before calling it settled.Meta-analysis · Nutrients

   Full breakdown →Vitamin D explained →Vitamin D Supplementation for Treating Atopic Dermatitis in Children and Adults: A Systematic Review and Meta-Analysis. Nutrients 2024
5. Skin & Glow-upwell supported · human dataAdded 24 September 2026

   The mental toll of acne shows up clearly across 42 pooled studies

   People with acne showed a significant association with both depression and anxiety in results pooled from 42 studies, with the strength of the link shifting by age, study setting and geographic region.

   ⚠What it shows: A consistent link, not proof that acne causes low mood: results pooled from 42 studies comparing people with and without acne. The underlying studies measured acne and mental health inconsistently, and some had no comparison group at all.Meta-analysis · J Am Acad Dermatol

   Full breakdown →Acne vulgaris and risk of depression and anxiety: A meta-analytic review. J Am Acad Dermatol 2020
6. Skin & Glow-upwell supported · human dataAdded 23 September 2026

   Only some probiotic strains calmed adult eczema

   Probiotic supplements reduced eczema severity scores in adults in pooled results from nine trials, with the largest benefit from Lactobacillus salivarius and in moderate-to-severe disease; L. fermentum showed no benefit, and quality of life scores did not meaningfully improve.

   ⚠What it shows: Real but strain-specific and incomplete: results pooled from nine trials show severity scores fell, especially in worse eczema, yet people's quality of life did not meaningfully improve. Nobody yet knows the right strain dose or how long to take it.Meta-analysis · Clin Exp Dermatol

   Full breakdown →Probiotics explained →Effects of probiotic supplementation in adult with atopic dermatitis: a systematic review with meta-analysis. Clin Exp Dermatol 2023
7. Skin & Glow-uppreliminary · human dataAdded 15 September 2026

   Old sunscreens linked to higher melanoma odds far from the equator

   Pooling 17 studies, sunscreen use showed no overall association with melanoma, but in populations living more than 40 degrees from the equator it was associated with 1.6 times the odds of melanoma, possibly because common formulations absorbed UVB almost completely while transmitting large quantities of UVA.

   ⚠What it shows: A provocative pattern, not proof: pooled results from 17 studies that followed people rather than testing sunscreen on them, spanning 1966 to 2007, and the studies disagreed with each other strongly. It cannot separate the sunscreen from the sun habits of the people who used it.Meta-analysis · Ann Epidemiol

   Full breakdown →Broad-spectrum SPF explained →Do sunscreens increase risk of melanoma in populations residing at higher latitudes?. Ann Epidemiol 2007
8. Skin & Glow-uppreliminary · human dataAdded 10 September 2026

   Eczema carries a higher risk of depression at every age

   A pooled analysis of 39 studies covering 234 306 people with atopic dermatitis and 10 935 459 comparison individuals found a significantly higher risk of depression in adults, and the same raised risk in children and adolescents. Findings varied substantially between the individual studies.

   ⚠What it shows: Consistent in direction, vague on size: results pooled from 39 studies of 234 306 people with atopic dermatitis against nearly eleven million comparison individuals, but the studies disagreed substantially and no single risk figure is reported. They tracked people rather than testing anything, so this cannot say which condition drives the other.Meta-analysis · J Paediatr Child Health

   Full breakdown →Inflammation explained →Risk of depression in patients with atopic dermatitis: An updated systematic review and meta-analysis of children, adolescent and adult groups. J Paediatr Child Health 2024
9. Skin & Glow-uppreliminary · human dataAdded 7 September 2026

   Probiotics eased eczema severity scores in adults, but the itch stayed put

   In pooled results from six randomised trials in 241 adults with atopic dermatitis, probiotics significantly lowered overall SCORAD severity scores and improved quality of life. Itch severity, skin severity, a standard dermatology life-quality index and immune markers showed no significant change.

   ⚠What it shows: A mixed picture worth holding loosely: only six trials with 241 adults, the studies disagreed with each other heavily, and the itch itself did not improve even as overall severity scores fell. None of the trials reported side-effect data.Meta-analysis · J Health Popul Nutr

   Full breakdown →Probiotics explained →The role of probiotics in the treatment of adult atopic dermatitis: a meta-analysis of randomized controlled trials. J Health Popul Nutr 2022
10. Skin & Glow-upwell supported · human dataAdded 6 September 2026

    The combined pill clears acne, and the brand matters less than you'd think

    In a Cochrane review of 25 randomised trials, combined oral contraceptive pills reduced facial acne lesion counts, severity grades and self-assessed acne compared with placebo, with few clear differences in effectiveness between pill types.

    ⚠What it shows: Strong evidence for the basic effect: results pooled from 25 trials where women were assigned treatments at random showed the pill beat placebo for acne, but comparisons between pill formulations rested on limited and sometimes conflicting data, and how the pill stacks up against other acne treatments is unknown.Meta-analysis · Cochrane Database Syst Rev

    Full breakdown →Combined oral contraceptive pills for treatment of acne. Cochrane Database Syst Rev 2009
11. Skin & Glow-uppreliminary · human dataAdded 2 September 2026

    Probiotics eased adult eczema in pooled trial data

    Probiotic supplements reduced eczema severity in adults in a pooled analysis of nine trials with 402 participants, with benefits in both the short and long term, and improved long-term quality of life. A mixture of Lactobacillus salivarius LS01 and Bifidobacterium BR03 ranked as the most promising combination.

    ⚠What it shows: Early and small: results pooled from nine trials with 402 adults, and the short-term benefit only just crossed the line for significance. The best-strain ranking comes from statistical modelling, not head-to-head tests.Meta-analysis · J Dermatolog Treat

    Full breakdown →Probiotics explained →The efficacy of probiotics supplementation for the treatment of atopic dermatitis in adults: a systematic review and meta-analysis. J Dermatolog Treat 2022
12. Skin & Glow-uppreliminary · human dataAdded 25 August 2026

    Probiotic capsules made a modest dent in acne, but the evidence is thin

    Pooled results from three double-blind trials in 231 people suggest oral probiotics modestly reduced inflammatory acne lesions compared with placebo, with no serious adverse events reported. The trials disagreed with each other, and the authors note future studies may plausibly find no meaningful effect.

    ⚠What it shows: Promising but thin: results pooled from just three trials in 231 people, and the trials disagreed with each other. The researchers' own analysis says future studies could plausibly find no meaningful effect at all.Meta-analysis · Medicina (Kaunas)

    Full breakdown →Probiotics explained →Oral Probiotics in Acne vulgaris: A Systematic Review and Meta-Analysis of Double-Blind Randomized Clinical Trials. Medicina (Kaunas) 2025
13. Skin & Glow-uppreliminary · human dataAdded 21 August 2026

    GLP-1 drugs linked to 40% higher risk of hair loss

    GLP-1 drugs were associated with a 40% higher risk of non-scarring hair loss in pooled data covering 1,091,743 patient-exposures, driven by telogen effluvium and pattern hair loss. Safety-report signals were strongest for semaglutide and tirzepatide.

    ⚠What it shows: A strong signal, not proof of cause: results pooled from 17 studies covering over a million patients' worth of drug use, most of which followed people rather than testing the drugs against a control. Rapid weight loss and the nutrient shortfalls it brings, rather than the drug itself, may be what triggers the shedding.Review · Skin Appendage Disord

    Full breakdown →GLP-1 explained →GLP-1 Receptor Agonists and Alopecia: A Systematic Review and Meta-Analysis of Incidence, Risk, Subtypes, and Mechanisms. Skin Appendage Disord 2026
14. Skin & Glow-upwell supported · human dataAdded 21 August 2026

    The sunscreen-causes-melanoma scare does not survive the data

    Pooled data from 18 studies show no association between sunscreen use and melanoma, with earlier alarming findings explained by failure to adjust for sun sensitivity. There was no dose-response pattern with frequency or years of use.

    ⚠What it shows: Reassuring and consistent: results pooled from 18 studies found no link, and the supposed harm vanished once studies accounted for sun-sensitive skin. All of the studies followed people rather than testing sunscreen directly, and the authors note it may take decades to detect any protective effect of newer formulations, so the benefit side stays open.Meta-analysis · Ann Intern Med

    Full breakdown →Broad-spectrum SPF explained →Sunscreen use and the risk for melanoma: a quantitative review. Ann Intern Med 2003
15. Skin & Glow-uppreliminary · human dataAdded 15 August 2026

    Oral collagen improved skin elasticity in placebo-controlled trials

    Across 11 randomised placebo-controlled trials in 805 people, oral collagen supplements improved skin elasticity, hydration and dermal collagen density, with no adverse events reported. Most trials used collagen hydrolysate at 2.5 g to 10 g a day for 8 to 24 weeks.

    ⚠What it shows: Promising but early: a sweep of all the placebo-controlled trials found 11, totalling 805 people, and they varied in product, dose and duration. The reviewers themselves call the results preliminary, and the best dosing regimen is still unknown.Systematic review · J Drugs Dermatol

    Full breakdown →Collagen explained →Oral Collagen Supplementation: A Systematic Review of Dermatological Applications. J Drugs Dermatol 2019
16. Skin & Glow-upwell supported · human dataAdded 10 August 2026

    Collagen supplements really did smooth wrinkles in pooled trials

    Oral hydrolysed collagen taken for 90 days reduced wrinkles and improved skin hydration and elasticity compared with placebo in a meta-analysis of 19 randomised, double-blind trials with 1,125 participants aged 20 to 70, 95% of them women.

    ⚠What it shows: Stronger than most supplement claims: results pooled from 19 placebo-controlled trials in 1,125 people, where neither participants nor researchers knew who got the real thing. Almost all participants were women aged 20 to 70, so the evidence says little about men.Meta-analysis · Int J Dermatol

    Full breakdown →Collagen explained →Effects of hydrolyzed collagen supplementation on skin aging: a systematic review and meta-analysis. Int J Dermatol 2021
17. Skin & Glow-upwell supported · human dataAdded 8 August 2026

    No link between topical retinoids and birth defects in pooled pregnancy data

    Across eight studies and 3,632,118 pregnancies, first-trimester exposure to topical retinoids was not associated with increased risk of major congenital malformations or spontaneous abortion.

    ⚠What it shows: Meta-analysis of eight observational studies, no randomised evidence, and the null result was driven mainly by a single large registry study. Says nothing about oral retinoids, whose risks are established.Systematic review · Front Drug Saf Regul

    Full breakdown →Retinoids explained →Topical retinoids and risk of major congenital malformations and spontaneous abortion: a systematic review and meta-analysis. Front Drug Saf Regul 2026
18. Skin & Glow-upwell supported · human dataAdded 6 August 2026

    Eczema linked to higher risk of death from all causes

    A meta-analysis of nine cohort studies found atopic dermatitis was associated with higher all-cause mortality (hazard ratio 1.222), along with raised risks of death from infectious, respiratory and gastrointestinal disease and cancer.

    ⚠What it shows: Meta-analysis of nine observational cohort studies; association, not causation. Results varied by study design and region, and the data cannot show whether treating eczema changes mortality risk.Meta-analysis · Expert Rev Clin Immunol

    Full breakdown →All-cause mortality explained →All-cause and cause-specific mortality in atopic dermatitis patients: a systematic review and meta-analysis. Expert Rev Clin Immunol 2026
19. Skin & Glow-uppreliminary · human dataAdded 6 August 2026

    Psoriasis: weight lost mattered more than fasting

    In a systematic review comparing dietary strategies for psoriasis, ketogenic and continuous calorie-restriction cohorts lost 10-25.6 kg and showed significant falls in Psoriasis Area and Severity Index scores, whereas intermittent fasting cohorts lost 0-2 kg and did not; no serious adverse effects were recorded with any approach.

    ⚠What it shows: A systematic review published in protocol form: it reports no number of included trials or participants, includes no head-to-head comparisons, and the authors flag heterogeneity and limited follow-up. The pattern links the amount of weight lost to skin severity rather than proving one diet beats another.Study · J Drugs Dermatol

    Full breakdown →Energy balance explained →Calorie Deficit Calculator →Impact of Intermittent Fasting, Keto Diet vs Continuous Caloric Restriction on Psoriasis Severity: A Systematic Review and Meta-Analysis Protocol. J Drugs Dermatol 2026
20. Skin & Glow-uppreliminary · human dataAdded 1 August 2026

    Patients saw stretch-mark gains; blinded doctor didn't

    In a 20-patient trial where each person had four comparable skin areas randomised, fractional radiofrequency plus topical tretinoin was the only stretch-mark treatment patients rated significantly better than untreated skin after 20 weeks. A blinded dermatologist saw only a non-significant tendency towards improvement.

    ⚠What it shows: Small single-centre randomised trial in 20 patients using within-person comparison of four skin areas over 20 weeks; the significant result was patient-reported and unblinded, while the blinded dermatologist and 3D photography found only subtle non-significant tendencies.RCT · Lasers Med Sci

    Full breakdown →Retinoids explained →Treatment of striae albae with combination of fractional radiofrequency and topical tretinoin: A randomized controlled trial. Lasers Med Sci 2026
21. Skin & Glow-upwell supported · human dataAdded 30 July 2026

    Antihistamines barely touch eczema itch, review finds

    A network meta-analysis of 47 randomised trials in 6230 children and adults found that adding oral antihistamines to eczema treatment cut severity and itch scores by amounts well below what patients would notice as important, and probably did not improve sleep disturbance or flare-ups. First-generation antihistamines probably increase cognitive impairment.

    ⚠What it shows: Systematic review and network meta-analysis of 47 randomised trials (6230 children and adults, mostly moderate to severe atopic dermatitis); certainty was moderate for the severity, itch and cognitive-impairment findings but only low for sleep and exacerbations, and the trials were largely in more severe disease.Meta-analysis · BMJ

    Full breakdown →Meta-analysis explained →Sleep Calculator →Antihistamines for atopic dermatitis (eczema): systematic review and network meta-analysis of randomised trials. BMJ 2026

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