IGF-1
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What Is IGF-1?
Insulin-like growth factor-1 (IGF-1) is a primary mediator of growth hormone (GH) that promotes cellular growth, differentiation, and anabolic effects in almost every tissue of the body. It plays a critical role in bone development and muscle hypertrophy by activating signaling pathways like mTOR and PI3K.
IGF-1 Research & Studies
01 Supplementing With Which Form of Creatine (Hydrochloride or Monohydrate) Alongside Resistance Training Can Have More Impacts on Anabolic/Catabolic Hormones, Strength and Body Composition? ▸
This study demonstrates that resistance training combined with creatine supplementation significantly increases serum IGF-1 levels, contributing to improved muscle mass and strength.
View Study (PubMed)02 Betaine supplement enhances skeletal muscle differentiation in murine myoblasts via IGF-1 signaling activation ▸
Research indicates that betaine supplementation improves muscle fiber maturation and hypertrophy by increasing the expression of the IGF-1 receptor and activating its signaling pathways.
View Study (PubMed)03 The influence of arginine supplementation on IGF-1: A systematic review and meta-analysis ▸
A meta-analysis exploring how arginine intake affects circulating IGF-1 levels, noting its role as a potential secretagogue for the growth hormone/IGF-1 axis.
View Study (PubMed)04 Creatine Supplementation and Skeletal Muscle Metabolism for Building Muscle Mass- Review of the Potential Mechanisms of Action ▸
This review highlights that creatine increases muscle mass partly by modulating the IGF-1/mTOR pathway, serving as a cellular stressor that triggers protein synthesis.
View Study (PubMed)05 The influence of vitamin D supplementation on IGF-1 levels in humans: A systematic review and meta-analysis ▸
A large-scale analysis found that Vitamin D supplementation significantly increases circulating IGF-1 concentrations in humans, suggesting a synergistic relationship for bone and muscle health.
View Study (PubMed)IGF-1 User Reviews & Experiences
*Based on large scale analysis of publicly available user experiences
While users highly value IGF-1 for its powerful muscle-building and recovery effects, there is a strong undercurrent of concern regarding its link to accelerated aging, hair loss, and potential cancer risk.
IGF-1 Benefits, Dosage & Side Effects
- Anabolic Growth: Promotes significant increases in skeletal muscle mass and strength when combined with resistance training.
- Tissue Repair: Accelerates recovery from injury, particularly in nerves and connective tissues, as reported by users exploring peptides.
- Cellular Proliferation: Stimulates the differentiation of myoblasts into mature muscle fibers via the mTOR pathway.
- Bone Density Modulation: Influences the gut-bone axis, where increased levels may improve bone mineral density.
- Synergistic Boosters: Supplements like creatine, Vitamin D, and arginine are scientifically noted to naturally elevate circulating IGF-1 levels.
- Gut Health Connection: Microbial metabolites like short-chain fatty acids (SCFAs) can stimulate liver production of IGF-1.
- Hair Aging Paradox: High levels of IGF-1 in the skin may paradoxically speed up hair follicle aging and graying despite its growth-promoting reputation.
- Natural Support: Users often stack Vitamin D (2000-5000 IU) and Creatine (3-5g) to maximize endogenous production.
- Colostrum Supplementation: Some users report benefits for gut and muscle health using 400mg to 5g of colostrum daily as a source of growth factors.
- Ketogenic Regulation: For those with excessively high levels, a ketogenic diet or fasting is frequently suggested to lower insulin-driven IGF-1.
- Dermatological Issues: Elevated IGF-1 is strongly linked to acne breakouts (zits) through the stimulation of sebaceous glands.
- Cancer Risk: Concerns exist regarding the potential for high IGF-1 levels to accelerate the growth of existing solid malignancies, such as prostate cancer.
- Insulin Sensitivity: Chronic pharmacological elevation (via HGH or peptides) can negatively impact glucose metabolism and lead to pre-diabetic states.
- Peptide Market: Users often source IGF-1 or its secretagogues (CJC-1295, Ipamorelin) through 'grey market' research chemical sources due to limited medical prescriptions.
- Diagnostic Monitoring: Advanced health panels (like Function or Superpower) are commonly used by biohackers to monitor IGF-1 levels because standard doctors may not test it without specific symptoms.
Related Compounds
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