Most research protocols and clinical experience suggest 6 months maximum for GH-releasing peptide stacks before taking 1-3 month breaks. Healing peptides (BPC-157, TB-500) can be used until injury resolution (typically 4-12 weeks) without the same cycling concerns. Extended protocols beyond 6 months may increase desensitization risk. Guidelines from
Clinical Endocrinology recommend periodic breaks to maintain pituitary responsiveness and allow endogenous hormone production to normalize.