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what is n-acetyl-l-carnitine used for Acetyl-L-Carnitine: Benefits, Forms, Dosing, and Side Effects – Dr Brad Stanfield Acetyl-L-Carnitine, 500 mg, 120 Vegetarian
Description
It depends on temperature: the higher the temperature, the more soluble the compound will be in water

Hulgan, T

FEBS Lett 593:21392150 Shitara Y, Nakamichi N, Norioka M, Shima H, Kato Y, Horie T (2013) Role of organic cation/carnitine transporter 1 in uptake of phenformin and inhibitory effect on complex I respiration in mitochondria

PN-1000262)

2021;7(15) doi: 10.1126/sciadv.abe9274

Only small, highly lipophilic molecules can passively diffuse across the barrier (Maiuolo et al., 2018)
