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L-carnitine provides an energy boost, which helps the body turn fat into energy and will then elevates certain enzymes that are needed by the body to effectively metabolize sugars, starches and other carbohydrates

Sleep improvements appear within the first one to two weeks

Systemic effects less commonly include mild dizziness or lightheadedness (may be copper-related), temporary nausea or headache (typically resolves within hours), mild fatigue (rare, reported with higher doses), and transient flu-like symptoms (very rare, may relate to systemic inflammatory response)

This suggests that BBB stays opened during the subacute and the chronic stages of stroke

It is administered intramuscularly and has a longer duration of action compared to other forms of Vitamin B12, such as cyanocobalamin