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A: It works relatively quickly due to direct absorption into the bloodstream, especially in cases of deficiency

This random coil transition is associated with an increase in absorbance at 260 nm, referred to as the hyperchromic effect [117]

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doi:10.1016/j.jad.2019.04.043 Nishida K, Sawada D, Kuwano Y, Tanaka H, Rokutan K
