The efficiency between oral versus injectable forms can differ considerably due to varying absorption rates and utilization by the body
PubMed, Park, Hyo-Hyun, Soyoung Lee, Hee-Young Son, et al
Those categories are not interchangeable
Musculoskeletal Health: Magnesium plays a crucial role in musculoskeletal health, including bone density and muscle function
In white adipose tissue, blocking NNMT elevated resting calorie burn, decreased adiposity, and improved insulin sensitivity in rodent models, independent of diet or activity changes (Kraus et al., Nature Medicine )
In one published case, an active, lean-adjacent man lost about one-third of his total weight as muscle on 2.5 mg and recovered it after adding resistance training and increasing protein. This is a cautionary case, not an incidence estimate