IGF1 LR3 | 1MG

IGF-1 LR3 (Long R3 Insulin-like Growth Factor-1) is a synthetic analog of human IGF-1 (insulin-like growth factor-1), a key mediator of growth hormone effects. It features structural modifications—an arginine substitution at position 3 and an additional 13-amino-acid extension at the N-terminus—that reduce binding to IGF-binding proteins (IGFBPs), extend half-life to approximately 20–30 hours, and increase potency (often reported as 2–3 times more anabolic than native IGF-1 in preclinical models).

IGF-1 LR3 binds to IGF-1 receptors on target cells (primarily muscle, but also other tissues), activating pathways like PI3K/Akt and MAPK/ERK to promote protein synthesis, cellular proliferation, differentiation, glucose uptake, and anti-apoptotic effects—driving anabolic and metabolic responses.

Potential human benefits (drawn from preclinical/animal studies showing strong anabolic effects, limited human observations/small trials on IGF-1 analogs, and extensive anecdotal reports in fitness, bodybuilding, recovery, and anti-aging communities):

• Muscle hypertrophy and strength gains — promotes significant lean muscle growth through enhanced protein synthesis, nitrogen retention, satellite cell activation, and hyperplasia (new muscle fiber formation), often leading to noticeable size and power increases.
• Accelerated recovery and tissue repair — supports faster healing from intense training, injuries, strains, or overuse; reduces downtime and improves resilience in muscles, tendons, and connective tissues.
• Fat loss and body recomposition — boosts lipolysis (fat breakdown), metabolic rate, and nutrient partitioning toward muscle over fat storage, aiding in reduced body fat while building or preserving lean mass.
• Improved metabolic health — enhances glucose uptake/utilization in muscles, potentially supporting better insulin sensitivity and energy dynamics in some contexts.
• Anti-aging and regenerative perks — anecdotal accounts highlight better skin quality/collagen support, bone density hints, cognitive/neuroprotective effects, and overall vitality from sustained anabolic signaling.

Human evidence is limited: primarily extrapolated from studies on native IGF-1 or related analogs (e.g., small trials showing body composition improvements in obese postmenopausal women with GH/IGF-1 combos, or metabolic effects), with no large-scale, randomized controlled trials specifically confirming efficacy or safety for IGF-1 LR3 in performance or anti-aging use. Benefits are often self-reported, dose-dependent, and synergistic with resistance training, diet, and other compounds.

Important Notice:

This product is intended for research use only.
Not for human or animal use of any kind.
Not a drug. Not approved for clinical or therapeutic use.

This product is intended for research use only.
Not for human or animal use of any kind.
Not a drug. Not approved for clinical or therapeutic use.