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So, it can be easy to confuse them with other performance-enhancing drugs like anabolic steroids, which can also be injected

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You can also boost glutathione in the body by supplementing its precursors, N-acetyl cysteine and glycine [15]

Additional articles were identified through searching the reference lists from included studies

The Direct Impact L-carnitine itself is not a stimulant like caffeine, but it does: Increase cellular energy production Improve mental alertness in some people For sensitive individuals, this increased energy may make it harder to fall asleep if taken late in the evening