An overview table of included studies is available in the Supplementary Material (S1) and online with options to filter the database ( The table includes information on first author and year of publication (1), paper title (2), whether the study was included in the meta-analysis (3) or systematic review (4), a tag indicating whether ghrelin or GLP-1 was investigated (5), specification of the hormonal assessment and/or manipulation (i.e., whether plasma acyl-, desacyl-, total ghrelin, GLP-1 was measured, which substance was administered (if any)) (6), type of reward phase assessed during fMRI (7), type of reward (e.g., food, money, alcohol) (8), and sample population(s) (9)
Overexpression of insulin-like growth factor-1 attenuates skeletal muscle damage and accelerates muscle regeneration and functional recovery after disuse
Your doctor can do a blood test to check your thyroid hormone levels
While the regulatory landscape creates challenges, informed researchers can access high-purity peptides with appropriate due diligence in vendor selection
(For context, GIP is a hormone that works in tandem with GLP-1) (9)
Here's the catch, though