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Strbe et al., 2021)

While up to 20% of adults have Vitamin B-12 deficiency, Hashimotos and hypothyroidism are risk factors for a deficiency in B-12

10.1093/hmg/ddl006 Hum

Nutrient utilization & metabolic efficiency: L-Carnitine is studied for its role in fatty-acid transport and mitochondrial energy pathways, often examined in relation to energy utilization, metabolic efficiency, and substrate processing

Negative side effects may include a paradoxical decrease in energy levels (most likely due to detoxification from methylation) or slight pain at the injection site which diminishes over 5-10 days
