Preparation of a multiple interacting magnetic fluid for rapid and sensitive simultaneous extraction of β-nicotinamide mononucleotide metabolites in biological samples

β-nicotinamide mononucleotide stands out as an essential breakthrough in "anti-aging" and consistently leads the list of top-selling nutritional supplements in terms of quantity. As the metabolites of β-nicotinamide mononucleotide, the detection of nicotinamide and N