The HPA axis can be disrupted by stress, resulting in variations in cortisol levels, the primary stress hormone (49)
doi: 10.1172/JCI31911 135 Ron-HarelNGhergurovichJMNotarangeloGLaFleurMWTsubosakaYSharpeAHet al
If 400mcg produces steady results, maintain that dose
Vitamins taken orally have an absorption rate of roughly 10%, while intramuscularly or via IV, they go straight into your bloodstream and system, and the absorption rate is 100%
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But far fewer know about IGFBP-3, its primary binding protein, which may hold the key to answering an increasingly important question: How much growth is too much, and when does it pose a cancer risk