Question explored with the scientific record
Criatina é bom para fazer crescer os meus musculos??
A creatina ajuda a ganhar força e massa muscular, mas só junto com treino de resistência. Sozinha, ela faz pouco.
A evidência mais forte é de adultos treinando com pesos. Uma revisão de 2004 já resumia o achado: cerca de 8% mais ganho de força e 14% mais em levantamento com creatina versus placebo, além de mais massa magra [1]. Uma revisão sistemática de 2020 confirma aumento de massa muscular e força com creatina mais exercício, na faixa de 10 a 20 g por dia [4]. Em mulheres, um estudo de 10 semanas mostrou 20 a 25% mais ganho de força de pernas do que treino sozinho, e outro achou 3,7% mais massa muscular [3]. Mas a mesma revisão diz que o efeito em mulheres pode ser menor e nem sempre significativo [3].
O ponto que ninguém vende: sem treino, o ganho é pequeno. Em idosos, uma meta-análise de 2026 achou efeito pequeno na força (g=0,31) e nenhum efeito significativo em massa muscular ou função [10]. Outra de 2021 só achou ganho de massa magra no subgrupo da creatina [6]. Um estudo de 1998 em idosos não achou benefício além do treino [5]. E parte do "ganho" pode ser água dentro da célula, não músculo novo [3].
| Grupo | Ganho de força vs treino só | Fonte |
|---|---|---|
| Adultos treinando | ~8% maior | [1] |
| Mulheres, 10 semanas | 20-25% maior (pernas) | [3] |
| Idosos 60+ | pequeno (g=0,31) | [10] |
| Idosos, massa muscular | sem efeito claro | [10] |
Sobre segurança: as revisões aqui não mostram dano renal em curto prazo [8][9], mas os dados de longo prazo são limitados [1]. A forma importa: creatina etil éster não superou a monohidratada [2], e produtos líquidos podem conter muito menos creatina do que o rótulo diz [7]. Fique com monohidratada em pó.
My call: vale a pena se você treina com pesos de forma consistente; sem treino, o retorno é pequeno. Confidence: moderate.
Sources used 10
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Scientific basis and practical aspects of creatine supplementation for athletes
This 2004 review synthesizes evidence on creatine monohydrate supplementation combined with resistance training, outlining mechanisms (including cellular hydration and possible MRF/MHC regulation), factors influencing uptake, practical dosing strategies, and the overall finding …
DOI: 10.1016/j.nut.2004.04.014 -
The effects of creatine ethyl ester supplementation combined with heavy resistance training on body composition, muscle performance, and serum and muscle creatine levels
A seven-week, double-blind, randomized trial in 30 previously untrained young men comparing creatine ethyl ester (CEE), creatine monohydrate (CRT), and maltodextrose placebo (PLA) during heavy resistance training shows that CEE does not offer superior gains in serum/muscle creat…
DOI: 10.1186/1550-2783-6-6 -
Effects of creatine on strength, muscle mass, post-exercise recovery and anaerobic capacity in women - literature review
In women, creatine supplementation may improve muscle strength and anaerobic performance, especially with training, while effects on muscle mass and post-exercise recovery remain less conclusive.
DOI: 10.12775/qs.2026.69.74214 -
EFFECTS OF CREATINE MONOHYDRATE TO STRENGTH AND BODY COMPOSITION
Creatine monohydrate (CR) combined with an exercise program increases muscle mass and strength and reduces time to perform an activity, with 10-20 g/day for 4-5 days per week an efficient dose.
DOI: 10.7251/sizen2001090b -
Effects of creatine monohydrate ingestion in sedentary and weight‐trained older adults
In healthy older adults, 8 weeks of oral creatine monohydrate did not improve body composition, maximal or endurance strength, or isometric endurance beyond the effects of strength training alone, despite evidence of creatine absorption.
DOI: 10.1046/j.1365-201x.1998.00427.x -
Does the combination of resistance training and a nutritional intervention have a synergic effect on muscle mass, strength, and physical function in older adults? A systematic review and meta-analysis
A meta-analysis of 22 RCTs found nutritional interventions combined with resistance training produced no additional effects on muscle mass, strength, or physical function in healthy older adults; creatine significantly increased lean body mass.
DOI: 10.1186/s12877-021-02491-5 -
A simple LC method with UV detection for the analysis of creatine and creatinine and its application to several creatine formulations
A simple LC-UV method enables rapid, simultaneous quantification of creatine and creatinine in commercial creatine formulations, revealing that liquid products may contain far less creatine than claimed and convert most to creatinine, while solid formulations preserve creatine m…
DOI: 10.1016/S0731-7085(02)00167-X -
The Impact of Creatine Supplementation on Physical Performance, Cognitive Functions, and Safety – A Literature Review
Creatine supplementation, especially with resistance training, increases lean mass and strength, may improve memory in older adults, and generally shows a favorable safety profile for kidney and liver function across diverse populations.
DOI: 10.12775/qs.2025.58.58256 -
Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis
A systematic review and meta-analysis of 22 randomized controlled trials (N=721) found that creatine supplementation during resistance training increases lean tissue mass and upper- and lower-body muscular strength in older adults, with effects persisting across sensitivity anal…
DOI: 10.2147/OAJSM.S123529 -
Effects of resistance training combined with creatine supplementation on muscle strength, physical function, and muscle mass in older adults: a systematic review and three-level meta-analysis
In older adults aged 60+, creatine supplementation combined with resistance training yields a small, moderate-certainty improvement in muscle strength versus resistance training alone, but no significant additional effects on muscle mass or physical function.
DOI: 10.3389/fnut.2026.1919884