Add 1,000 L (1 mL) of reconstitution solvent to the 1 mg vial This yields a 1 mg/mL (1,000 g/mL) stock solution To achieve 100 g/mL working stock: Dilute 100 L of 1 mg/mL stock into 900 L of PBS or cell culture medium yields 100 g/mL in 1 mL To achieve 10 ng/mL in a 5 mL experiment: Take 0.5 L of 100 g/mL working stock + 4,999.5 L of medium Alternatively: dilute to an intermediate concentration to reduce pipetting error Use a dilution series approach (stock working stock final experimental concentration) to minimize pipetting inaccuracy at nanogram-level concentrations
Kaplowitz, N., Aw, T
Eur J Nutr 46:20412 Papakostas GI, Shelton RC, Zajecka JM, Etemad B, Rickels K, Clain A, Baer L, Dalton ED, Sacco GR, Schoenfeld D, Pencina M, Meisner A, Bottiglieri T, Nelson E, Mischoulon D, Alpert JE, Barbee JG, Zisook S, Fava M (2012) l-Methylfolate as adjunctive therapy for SSRI-resistant major depression: results of two randomized, double-blind, parallel-sequential trials
For clinical insights, refer to National Institutes of Health (NIH) and for safety guidance, consult Mayo Clinic Glutathione Information