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Vivid dreams often accompany these sleep improvements, indicating deeper sleep stages where growth hormone release naturally peaks

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Common side effects by peptide type Growth hormone peptides: Water retention (temporary) Lethargy initially (adapts within weeks) Carpal tunnel symptoms (rare, high doses) Insulin resistance (monitor with long-term use) IGF-1 LR3: Hypoglycemia (keep fast carbs on hand) Jaw/facial bone growth (with chronic use) Organ enlargement (long-term misuse) Healing peptides: Minimal side effects Occasionally: fatigue, headache (rare) Monitoring and bloodwork Baseline testing before starting: IGF-1 levels Thyroid panel (T3, T4, TSH) Fasting glucose and insulin Lipid panel Liver and kidney function Follow-up testing: Every 3-6 months during protocol Monitor IGF-1 (ensure not excessively elevated) Check glucose metabolism Liver/kidney function Contraindications Avoid peptides if: Active cancer (GH/IGF-1 can promote tumor growth) Diabetic without physician oversight Significant organ disease Use caution if: Family history of cancer Pre-diabetic Taking medications that affect blood sugar See our peptide safety and risks guide for comprehensive safety information

doi: 10.3389/fvets.2025.1502236 Received 26 September 2024 Accepted 21 May 2025 Published 30 June 2025 Volume 12 - 2025 Edited by Maurice Pitesky, University of California, Davis, United States Reviewed by Blagica Sekovska, Saints Cyril and Methodius University of Skopje, North Macedonia Christine Pye, University of Liverpool, United Kingdom Updates Copyright 2025 Tarrant, Rai, Wright, Street and Wells