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[ 15 ] Circadian rhythms are approximately 24-hour biological cycles that regulate sleep, hormone release, metabolism, body temperature, and many other physiological functions
In United States hospitals, injections occur every day for diverse treatments
Immune signaling also touches skin repair, since inflammation can slow collagen repair and can push hairs into a rest phase after illness or infection
Split dosing may help if: single morning dose produces effects that fade by afternoon, you are using higher doses (450-500mcg) where sustained levels may help, or evening administration fits your schedule better than early morning
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