The primary function of L-carnitine in the body is to regulate fat oxidation
They are available on NHS prescription when NICE criteria are met (as outlined in NICE NG28 for type 2 diabetes and relevant technology appraisals for weight management), and are administered via subcutaneous injection, typically weekly or daily depending on the formulation

Other Related Information Mapping in Human Pancreatic Cancer Tissue by GLP-1 (7-36)-amide Antibody (H-028-11) Protocol for antibody staining Tissue Sample Human pancreas cancer tissues Fixative 10% formalin Embedding Paraffin Negative Control No primary antibody Pretreatment N/A Blocking 3% H2O2, 2% Normal Goat Serum Primary Antibody Rabbit Anti-GLP-1 (7-36)-NH2 Antiserum (Catalog No.: H-028-11) Optimal Dilution 1: 500 Secondary Antibody Goat Anti-Rabbit IgG, Biotinylated (1:400), 30 min Amplification Streptavidin-HRP (Vector), 1:400, 30 min Detection System HRP Substrate DAB (Sigma), 3 min Counterstained Hematoxylin, 30 sec Mapping in Rat Pancreas and Intestines by GLP-1 (7-37) Antibody (H-028-13) Rat Pancreatic and intestinal tissue Pre-immuno serum Intact 2% Normal Goat Serum Rabbit Anti-GLP-1 (7-37) (Human, Rat, Mouse, Porcine) Serum (Catalog No.:H-028-13) 1:500, 1 hour at RT ABC (Vector) (1:400, 30 min) with methyl green Rat pancreatic and intestinal sections with an antiserum for human GLP-1 (737) (Phoenix Pharmaceuticals, Mountain View, California, USA) at a concentration of 1/500

The Top 3 Recommended Injection Sites Medical guidelines identify three primary areas that are safe and effective for subcutaneous injections
It is one of the most affordable prescription medications in existence