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Sources: Sonthalia et al., 2018 , Narrative review, 2025 Precautions before treatment Disclose your full medical history, medicines and supplements Get a personalised dose and route from a qualified doctor Avoid if pregnant or breastfeeding Flag any known allergies or sensitivities Self-medication or IV use without medical supervision can pose serious health risks
Benzyl alcohol prevents bacterial growth, allowing for multiple-dose use via intravenous or intramuscular injection
For high thyroid hormone levels (hyperthyroidism): 2-4 grams of L-carnitine has been taken daily for 2-4 months
( 11 ) However, if youre severely deficient in Vitamin B12, it may take several weeks to fully restore your levels and feel the cumulative benefits
