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Vitamin B12 is an essential nutrient that plays a key role in red blood cell formation, neurological function, and energy metabolism

Receiver operating characteristic curve analysis demonstrated the best diagnostic accuracy at an IGF-1 cutoff of1.493 SD, with 0.685 sensitivity, 0.417 specificity, 0.25 positive and 0.823 negative predictive values, and 0.517 area under the curve

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Each amino acid plays an important role in supporting overall skin and body health.

The lyophilized material is supplied for reconstitution per established laboratory protocols and is intended as a reference material in controlled research environments