Creatine May Have Brain and Muscle Benefits: Initially popular among athletes for muscle growth and performance, creatine is now recognized for its potential positive effects on brain function. Naturally occurring in the body, especially in muscles, supplementation can significantly boost its levels. Enhancing Brain Function: Studies suggest that creatine supplementation increases brain creatine levels, which may counter mental fatigue and enhance brain energy metabolism. It's particularly noted for improving memory, especially in older adults, and may also boost intelligence and reasoning abilities. Specific Benefits and Safety: Research indicates notable benefits of creatine supplementation for older adults, women, and those under metabolic stress. Concerns regarding kidney health have been largely dispelled, with studies suggesting safety in young adults and chronic renal disease patients. Optimal Use and Dosage: The most studied and accessible form of creatine is creatine monohydrate, with a general consensus on a dosage of around 5 grams per day. This dosage is believed to support both muscle and brain wellness effectively. 

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