liposomal glutathione 50 ml Designs for Health - Liquid Glutathione Supplement, 100mg with Enhanced Absorption - Detox + Immune System Support Quicksilver Scientific Liposomal Glutathione -
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M.KloschB.VolkerC.GorrenA

While this isnt as accurate as the first two methods, it will place your dives fairly closely and provide a slight safety margin as well

Volume 88, Issues 1112, 14 March 2011, Pages 535-542 Chang, C.-H., Tsai, W.-C., Lin, M.-S., Hsu, Y.-H., & Pang, J.-H

Sequence analysis of GPX genes/proteins A total of 87 GPX homologs were identified in the protein datasets of 18 plant species using Arabidopsis GPX1-8 for homology search
