l carnitine liquid or capsule which is better Acetyl-L-Carnitine, 120 Veggie Caps (500 mg per Cap) ProSupps L-Carnitine Liquid 3000, Stimulant-Free

Oncotarget 8 , 5949259499 (2017)

Quality and Purity: 99%+ Verified PSPeptides compounds are manufactured in the United States and verified at 99%+ purity through third-party HPLC testing, with batch-specific Certificates of Analysis documenting purity and identity for every product

Transports Fatty Acids* Boosts Cellular Energy* Acetyl-L-Carnitine (ALC) is a modified amino acid that supports cellular energy production by assisting in the transport of fat into the mitochondria where it is converted into ATP (cellular fuel).* ALC is a highly bioavailable form of carnitine that can cross the blood-brain barrier, where it helps to neutralize free radicals, supports mitochondrial function and helps to maintain normal neurotransmitter activity.* Clinical studies suggest that ALC helps to maintain optimal neurological health.* Natural color variation may occur in this product.

It may take a few weeks before your Vitamin B12 levels and symptoms, such as extreme tiredness or lack of energy, start to improve