News Release July 12, 2007 ConsumerLab.com finds lutein & zeaxanthin supplements vary widely in strength but most meet ingredient claims Right amount of antioxidant may help prevent macular degeneration and improve vision WHITE PLAINS, NEW YORK July 12, 2007 ConsumerLab.com announced today that all but one of the thirteen lutein and zeaxanthin supplements it recently chose to test met quality standards
Peptide structure and stability What peptides are: Chains of amino acids Held together by peptide bonds Specific 3D structure required for function Fragile molecules compared to small molecule drugs Why peptides are unstable: Peptide bonds susceptible to hydrolysis (water breaks bonds) Oxidation damages certain amino acids Temperature accelerates degradation Light exposure causes photo-degradation pH changes denature structure Bacterial contamination introduces enzymes that break peptides Degradation mechanisms: Temperature's exponential effect: Every 10C temperature increase roughly doubles degradation rate Room temperature (25C): Rapid degradation (days) Refrigerated (2-8C): Slow degradation (weeks-months) Frozen (-20C): Very slow degradation (years) Ultra-frozen (-80C): Minimal degradation (5+ years) Learn peptide fundamentals at SeekPeptides - explore what are peptides , how peptides work , and getting started with peptides
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