Is MK-677 basically oral HGH, and why does it make people hungry?

MK-677, or ibutamoren, is an orally active ghrelin-receptor agonist that stimulates GH secretion. It is not GH in tablet form and is not itself a peptide. Its action at the ghrelin receptor helps explain why increased hunger can accompany its hormonal effects.[1]

In a randomized trial of healthy older adults, MK-677 increased GH, IGF-1, and fat-free mass, but did not improve strength or physical function. Appetite increases, edema, and muscle discomfort were reported. Fasting glucose rose and insulin sensitivity decreased, showing that “stimulates your own hormone” does not mean metabolically neutral.[1]

The results also cannot establish an interchangeable conversion between MK-677 and injected HGH, or prove that combining them improves meaningful outcomes. Hunger might help one person eat more and undermine another person’s weight-management goal. Assess the actual benefit and adverse effects rather than treating an oral route or a natural secretion pattern as evidence of superior safety.[1]