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Like other anti-aging hormones, DHEA is produced by the body in abundant supplies during our youth, reaching its peak between the ages of 20 to 25, then decreasing to much lower levels later in life

Acta Biomater , 2014, 10(5): 1955-1964

Cell Mol Life Sci 60(7):13761393 Bollu VS et al (2016) Evaluation of in vivo cytogenetic toxicity of europium hydroxide nanorods (EHNs) in male and female Swiss albino mice

The most vulnerable include: Methionine Cysteine Tryptophan Tyrosine Histidine Asparagine These amino acids are more likely to undergo: Oxidation Deamidation Structural rearrangement As their numbers increase, overall peptide stability usually decreases