This injection is typically administered into the muscle, allowing for quick absorption and sustained effects
Altered bioenergetics and mitochondrial dysfunction of monocytes in patients with COVID-19 pneumonia
Clinical and Translational Medicine, 14 (3), Article e1636
That said, in humans the data are less robust than for some other sleep interventions, so effective depends on how you define it (improvement vs complete resolution of poor sleep quality)
News Release November 01, 2017 Gummies Are Most Likely to Fail Testing in Review of Multivitamins -- Best and Worst Multivitamins Identified by ConsumerLab Testing White Plains, New York, November 1, 2017 Multivitamin/multimineral supplements are among the most popular supplements, with many consumers relying on them to provide nutrients they may not get from their diets