Magnesium Supplementation as a Nutritional Intervention in Sarcopenia (SARCOMAG)
Effects of Magnesium Supplementation on Muscle Strength, Muscle Mass, and Physical Performance in Sarcopenic Individuals
Sarcopenia is a progressive condition common in older adults and is characterized by loss of muscle strength, muscle mass, and physical performance. It is associated with an increased risk of falls, disability, reduced independence, and poorer quality of life. Nutritional interventions are recommended as part of sarcopenia management; however, evidence regarding the role of specific micronutrients remains limited. Magnesium is an essential mineral involved in muscle contraction, neuromuscular function, energy production, and inflammation regulation. Low magnesium status is frequent in older adults and may contribute to muscle impairment and physical decline.
This study aims to evaluate the effects of magnesium supplementation on muscle strength, muscle mass, and physical performance in older adults with sarcopenia living in the eastern Algarve region of Portugal. In addition, the study will assess the prevalence of low magnesium status and sarcopenia in this population.
The study will be conducted in two phases. In the first, observational phase, community-dwelling adults aged 70 years or older will be assessed for sarcopenia according to established diagnostic criteria. Blood samples will be collected to measure serum and erythrocyte magnesium levels and C-reactive protein as an inflammatory marker. Participants diagnosed with sarcopenia and presenting low magnesium levels will be eligible for the second phase.
In the second phase, eligible participants will be randomly assigned to receive either oral magnesium supplementation (400 mg/day of magnesium citrate) or a placebo for 12 weeks, in a double-blind and controlled design. After the intervention period, participants will be reassessed for muscle strength, muscle mass, physical performance, magnesium status, and inflammation.
The results of this study are expected to clarify the role of magnesium supplementation as a nutritional strategy in sarcopenia. Findings may contribute to improving nutritional recommendations and supporting interventions aimed at preserving muscle health, physical function, and quality of life in older adults.
Visão geral do estudo
Status
Status
Condições
Condições
Intervenção / Tratamento
Intervenção / Tratamento
Tipo de estudo
Tipo de estudo
Inscrição (Estimado)
Inscrição
Estágio
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
Contato de estudo
- Nome: Dina F João
- Número de telefone: +351961647475
- E-mail: drjoao@ualg.pt
Locais de estudo
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Faro District
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Faro, Faro District, Portugal, 8005-139
- Escola Superior de Saúde - Universidade do Algarve
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Contato:
- Dina F João
- Número de telefone: +351961647475
- E-mail: drjoao@ualg.pt
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Investigador principal:
- Dina F João
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Critérios de participação
Critérios de elegibilidade
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto mais velho
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- Adults aged 70 years or older
- Community-dwelling individuals residing in the eastern Algarve region of Portugal
- Not hospitalized at the time of recruitment
- Ability to participate in study assessments, regardless of mobility status
- Ability to provide written informed consent, either personally or via a legally authorized representative when applicable
- Adequate cognitive ability to collaborate with study procedures, as determined by screening assessment
Exclusion Criteria:
- Alcoholism
- Acute gastrointestinal conditions with symptoms of diarrhea and/or vomiting
- Presence of conditions associated with magnesium imbalance, including: Electrolyte disorders, Hyperthyroidism, Type 1 diabetes mellitus, Renal disease, Hyperaldosteronism, Short bowel syndrome or history of intestinal resection, Gastric bypass surgery
- Use of medications known to affect magnesium metabolism, including: Loop or thiazide diuretics (e.g., furosemide, thiazides), Proton pump inhibitors (e.g., omeprazole, pantoprazole, esomeprazole), Cytotoxic agents (e.g., cisplatin, carboplatin, gallium nitrate), Antimicrobial agents such as aminoglycosides, Immunosuppressive agents, Beta-adrenergic agonists (e.g., theophylline, salbutamol, rimiterol), Cetuximab, Cyclosporine A, Pamidronate.
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Dobro
Número de braços
Armas e Intervenções
Grupo de Participantes / BraçoGrupo de Participantes / Braço |
Intervenção / TratamentoIntervenção / Tratamento |
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Comparador de Placebo: Placebo
Participants assigned to the placebo comparator group will receive an oral placebo administered daily for 12 weeks.
The placebo consists of capsules containing microcrystalline cellulose, an inert substance with no known biological effects.
The placebo capsules are identical in appearance, taste, and packaging to the magnesium supplement, ensuring blinding of participants and investigators.
Participants will be instructed to take the capsules according to the same schedule as the intervention group.
Adherence will be monitored through capsule count at follow-up visits.
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Participants assigned to the placebo comparator arm will receive an oral placebo administered daily for 12 weeks.
The placebo consists of capsules containing microcrystalline cellulose, an inert substance with no known physiological or therapeutic effects.
The placebo capsules are identical in appearance, taste, and packaging to the magnesium supplement to ensure blinding of participants and investigators.
The dosing schedule will be the same as that used in the experimental group.
Adherence to the intervention will be monitored by capsule count at follow-up visits, and participants will be observed regularly for tolerability and safety.
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Experimental: Magnesium Supplementation
Participants assigned to the experimental arm will receive oral magnesium supplementation administered daily for a period of 12 weeks.
The intervention consists of magnesium citrate capsules providing a total daily dose of 400 mg of elemental magnesium.
The supplement will be taken according to a standardized dosing schedule identical to that of the placebo group.
Magnesium citrate was selected due to its favorable bioavailability.
Participants and investigators will remain blinded to treatment allocation throughout the study.
Adherence to the intervention will be assessed by capsule count at follow-up visits, and participants will be monitored regularly for tolerability and potential adverse events.
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Participants assigned to the experimental arm will receive oral magnesium supplementation administered daily for 12 weeks.
The intervention consists of magnesium citrate capsules providing a total daily dose of 400 mg of elemental magnesium.
The supplement will be taken according to a standardized dosing schedule identical to that of the placebo group.
Magnesium citrate was selected due to its favorable bioavailability.
Participants, investigators, and outcome assessors will remain blinded to group assignment throughout the study.
Adherence to the intervention will be assessed by capsule count at follow-up visits, and participants will be monitored regularly for tolerability and potential adverse events.
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O que o estudo está medindo?
Medidas de resultados primários
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Muscle Strength
Prazo: Baseline and 12 weeks
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Change in muscle strength assessed by handgrip strength using a calibrated handgrip dynamometer.
Handgrip strength will be measured in a seated position, with the elbow flexed at 90 degrees, following standardized procedures.
Three measurements will be performed on the non-dominant hand (or dominant hand if necessary), with the highest value recorded.
Muscle strength will be evaluated at baseline and after 12 weeks of intervention.
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Baseline and 12 weeks
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Muscle Mass
Prazo: Baseline and 12 weeks
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Change in muscle mass assessed by bioelectrical impedance analysis, including appendicular muscle mass and muscle mass adjusted for height.
Measurements will be performed at baseline and after 12 weeks of intervention.
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Baseline and 12 weeks
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Physical Performance
Prazo: Baseline and 12 weeks
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Change in physical performance assessed by the 4-meter gait speed test, conducted according to standardized procedures.
Performance will be assessed at baseline and after 12 weeks of intervention.
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Baseline and 12 weeks
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Medidas de resultados secundários
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
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Serum Magnesium Levels
Prazo: Baseline and 12 weeks
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Change in serum magnesium concentration measured from blood samples using standard laboratory procedures.
Serum magnesium levels will be assessed at baseline and after 12 weeks of intervention.
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Baseline and 12 weeks
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Erythrocyte Magnesium Levels
Prazo: Baseline and 12 weeks
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Change in intracellular magnesium status assessed by erythrocyte magnesium concentration measured from blood samples using validated laboratory methods.
Measurements will be performed at baseline and after 12 weeks of intervention.
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Baseline and 12 weeks
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Inflammation
Prazo: Baseline and 12 weeks
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Change in systemic inflammation assessed by serum C-reactive protein (CRP) concentration measured using standard laboratory methods.
CRP levels will be evaluated at baseline and after 12 weeks of intervention.
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Baseline and 12 weeks
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Adherence to Supplementation
Prazo: Up to 12 weeks
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Adherence to the prescribed intervention assessed by capsule count, calculated as the proportion of capsules consumed during the 12-week intervention period.
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Up to 12 weeks
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Safety and Tolerability
Prazo: Up to 12 weeks
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Occurrence of adverse events and tolerability of magnesium supplementation or placebo assessed through participant reporting and regular monitoring during the intervention period.
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Up to 12 weeks
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Outras medidas de resultado
Outras medidas de resultado
Medida de resultado |
Descrição da medida |
Prazo |
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Prevalence of Hypomagnesemia
Prazo: Baseline
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Prevalence of low magnesium status determined by serum and/or erythrocyte magnesium concentrations below established reference values at baseline.
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Baseline
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Prevalence of Sarcopenia
Prazo: Baseline
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Prevalence of sarcopenia determined at baseline according to the European Working Group on Sarcopenia in Older People (EWGSOP) diagnostic criteria.
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Baseline
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Colaboradores e Investigadores
Patrocinador
Patrocinador
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Estimado)
Início do estudo
Conclusão Primária (Estimado)
Conclusão Primária
Conclusão do estudo (Estimado)
Conclusão do estudo
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Primeira postagem
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última Atualização Postada
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
Outros números de identificação do estudo
- UAIF201/2025FARO
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
Descrição do plano IPD
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