These amounts are considered safe because the human body, as a general matter, can safely store from 1,000 to 2,000 times the RDA, without negative consequence (anything more will generally be excreted in urine, per NCBI Bookshelf)
Most people don't realise that the hours we spend asleep are actually among our most constructive, certain areas of our brains work their hardest during sleep, and skin is the best time to repair and regenerate itself at night
However, avoid contact with the eyes and mucous membranes
Schedule (Once Weekly Injection) Upper limit: 12 mg per week is the highest dose used in the major published clinical trials (Phase 2 obesity, Phase 2 type 2 diabetes, and the Phase 3 TRIUMPH-4 and TRANSCEND-T2D-1 studies)
And I don't feel sluggish, got more energy
Though effective, they must be done under expert supervision to avoid burns or sensitivity