Selênio para Perda Capilar Relacionada à Tireoide
ABaseado em 35 estudos (6 meta-analyses, 5 RCTs) com 10,466 participantes no total. Os resultados são variados entre os estudos.
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A
Conclusão
Despite selenium's role in thyroid function, research does not support supplementing with selenium to improve thyroid-related hair loss, and excess selenium may actually worsen hair problems.
- Mixed results across 35 studies — no consistent benefit for hair loss
- Selenium is important for thyroid health, but supplementation has not shown hair benefits
- Selenium toxicity is a known cause of hair loss — excess intake is risky
- Consult a healthcare provider before supplementing, especially for thyroid concerns
Key Study Findings
Observational Study
n=2582
Relationship Between Serum Vitamins and Cognitive Impairment in the Elderly: A Study Based on the …
Dose: None
vs: None
Outcome: Cognitive impairment risk
Efeito: OR=0.695 (Vit D); OR=0.777 (FA)
p=0.003 (Vit D); p=0.034 (FA)
População: Elderly participants aged 60+ from NHANES 2011-2014
Systematic Review and Meta-Analysis
n=7014
Trace Elements and Risk of Immune-Mediated Skin Disease: A Systematic Review and Meta-analysis.
Dose: None
vs: Placebo
Efeito: Standardized mean differences reported for each element and disease combination (specific values not
None
prospective controlled study
n=30
Investigation of ischaemia-modified albumin and antioxidant vitamins and minerals levels in alopecia areata patients and …
Dose: None
vs: Placebo
Efeito: None
None
Review
The role of trace elements for the function and health of the skin.
Dose: None
vs: Placebo
Efeito: None
None
Review
Medical Marijuana and Treatment Personalization: The Role of Genetics and Epigenetics in Response to THC …
Dose: None
vs: None
Outcome: None
Efeito: None
None
População: Review of pharmacogenomics of THC and CBD
Review
Minerals and Trace Elements: Key Protectors of Skin Health and Defenders against Skin Disorders.
Dose: None
vs: Placebo
Efeito: None
None
Key Statistics
38
Estudos
10748
Participantes
↔
Mixed
A
Nota
Referenced Papers
Brain and behavior
2026
Redox report : …
2025
8 citações
Minerals and Trace Elements: Key Protectors of Skin Health and Defenders against Skin Disorders.
Review
Current medicinal chemistry
2025
5 citações
Journal of trace …
2025
4 citações
Cutaneous and ocular …
2025
1 citações
Genes
2025
1 citações
Trace Elements and Risk of Immune-Mediated Skin Disease: A Systematic Review and Meta-analysis.
Meta-Analysis
Nutrition reviews
2025
Journal of cosmetic …
2024
7 citações
Micronutrients and Androgenetic Alopecia: A Systematic Review.
Systematic Review
Molecular nutrition & …
2024
7 citações
Journal of cosmetic …
2024
4 citações
The Cochrane database …
2023
47 citações
Arthritis care & …
2023
36 citações
Frontiers in pharmacology
2023
29 citações
Journal of the …
2023
20 citações
Bartter Syndrome: A Systematic Review of Case Reports and Case Series.
Systematic Review
Medicina (Kaunas, Lithuania)
2023
17 citações
Molecules (Basel, Switzerland)
2023
14 citações
Skin research and …
2023
11 citações
Medical cannabis and …
2023
9 citações
Safety and risks of CBD oils purchased online: unveiling uncertain quality and vague health claims.
Other
Frontiers in pharmacology
2023
8 citações
Italian journal of …
2023
3 citações
Journal of equine …
2022
6 citações
Therapeutic advances in …
2022
4 citações
Cannabis and cannabinoid …
2021
171 citações
The Journal of …
2021
162 citações
Journal of clinical …
2020
42 citações
Skin appendage disorders
2020
10 citações
Medical cannabis and …
2018
158 citações
Journal of dance …
2018
15 citações
American journal of …
2017
104 citações
Changes of serum trace elements level in patients with alopecia areata: A meta-analysis.
Meta-Analysis
The Journal of …
2017
31 citações
Acta dermatovenerologica Croatica …
2016
6 citações
Prostaglandins, leukotrienes, and …
2015
40 citações
[Vitamins and nutritional supplements in older persons: How to diagnose and when to substitute?].
Review
Der Internist
2015
3 citações
Inflammatory bowel diseases
2012
224 citações
Medycyna wieku rozwojowego
2011
Food and nutrition …
2008
83 citações
The New England …
2006
47 citações
Cardiovascular research
2006
42 citações
Acta dermato-venereologica
1986
53 citações
Dosage & Usage
mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units
Dosagens Comumente Utilizadas
- general:
- 55 mcg/day
Limite superior: 400 mcg/day
Dosagens Estudadas em Pesquisas
| Dosagem | Duração | Efeito | N |
|---|---|---|---|
| None | -- | Positive | 2582 |
| None | -- | Mixed | 7014 |
| None | -- | Neutral | 30 |
| None | -- | Mixed | -- |
| None | -- | Mixed | -- |
| None | -- | Positive | -- |
| NaSe 5.6ppm, Met 4.7ppm, DPDS 14.2ppm, NanoSe 2.7ppm | 4 weeks | Positive | 40 |
| not applicable | -- | Mixed | 180 |
Melhor horário: With meals for better absorption
Safety & Side Effects
Efeitos Colaterais Relatados
- ⚠ Hair loss at excessive doses (selenosis)
- ⚠ Brittle nails
- ⚠ Garlic-like breath odor at high doses
- ⚠ Nausea and diarrhea
Interações Conhecidas
- ● Statins (selenium may reduce statin effectiveness)
- ● Chemotherapy drugs (antioxidant effects may theoretically interfere)
- ● Niacin (may decrease HDL-raising effect when combined)
Ingestão máxima tolerável: 400 mcg/day
Consulte sempre o seu profissional de saúde antes de iniciar qualquer suplemento.Sempre consulte seu profissional de saúde antes de iniciar qualquer suplemento.
Frequently Asked Questions
Does Selênio help with Perda Capilar Relacionada à Tireoide?
Based on 38 studies with 10,748 participants, there is strong evidence from multiple clinical trials that Selênio may support Perda Capilar Relacionada à Tireoide management. Our evidence grade is A (Strong Evidence).
How much Selênio should I take for Perda Capilar Relacionada à Tireoide?
Studies have used various dosages. A commonly studied range is 55 mcg/day. Always consult your healthcare provider before starting any supplement regimen.
Are there side effects of Selênio?
Reported side effects may include Hair loss at excessive doses (selenosis), Brittle nails, Garlic-like breath odor at high doses, Nausea and diarrhea. Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.
How strong is the evidence for Selênio and Perda Capilar Relacionada à Tireoide?
We rate the evidence as Grade A (Strong Evidence). This rating is based on 38 peer-reviewed studies with 10,748 total participants. The overall direction of effect is mixed.
Related Evidence
Selênio para outras condições
Aviso Legal da FDA: Estas declarações não foram avaliadas pela Food and Drug Administration. Os produtos e informações neste site não se destinam a diagnosticar, tratar, curar ou prevenir qualquer doença. As notas de evidência apresentadas são baseadas em nossa análise de pesquisas revisadas por pares publicadas e não constituem aconselhamento médico. Sempre consulte seu profissional de saúde antes de iniciar qualquer regime de suplementação.