Understanding how protein, metabolites and lipid levels are correlated to gene variants can help elucidate how variants can impact regulation pathways and disease pathology. Most quantitative trait loci (QTL) studies have been performed using mRNA levels (eQTL) that combined with colocalization and Mendelian Randomization approaches have been instrumental to identify functional genes for complex traits. There are very few protein quantitative trait locus (pQTL) and metabolite quantitative trait loci (MQTL) studies, but those  have traditionally been conducted in blood, urine, plasma. This study examines pQTL and MQTL in  a very large cerebral spinal fluid (CSF) and brain sample size, leading to the largest and most complete pQTL and MQTL atlas in brain and CSF.