IGF-1 (Insulin-like Growth Factor 1) is a powerful anabolic growth factor – a hormone naturally produced in the liver in response to growth hormone (GH) stimulation.
Colostrum and certain milk peptides – naturally contain small amounts of IGF-1
None of these should be used casually – they alter endocrine systems and carry side effect profiles.
Key Takeaways
IGF-1 is a growth-regulating hormone activated by GH
It promotes muscle repair, skin health, bone density, and more
High IGF-1 = anabolic, but long-term overexpression may raise cancer risk
Compounds like MK-677 and GH peptides raise IGF-1 levels
IGF-1 is powerful – and shouldn’t be boosted recklessly
FAQ about IGF-1 (Insulin-Like Growth Factor 1)
Is IGF-1 a steroid? No. It’s a peptide hormone, not an anabolic steroid. It acts via the IGF-1 receptor – not the androgen receptor. Further reading: Are SARMs steroids?
What does IGF-1 do in the body? It helps build muscle, strengthen bone, repair tissues, and support metabolism – especially under the influence of growth hormone.
Can you increase IGF-1 naturally? Yes – via sleep, training, protein intake, and blood sugar control. GH-releasing stimuli also help.
Is IGF-1 safe to take? Endogenous (natural) IGF-1 is essential. However, long-term artificial elevation can pose risks, including potential cancer promotion.
Does IGF-1 affect skin and aging? Yes. It supports collagen synthesis, skin thickness, and wound healing – making it of interest in anti-aging protocols.
Definition: A peptide is a short chain of amino acids linked by peptide bonds. In the body, peptides act as signalling molecules, controlling everything from hormone release to tissue repair. They’re smaller than proteins and are either naturally produced or synthetically engineered for therapeutic or research use. Quick Summary Term Peptide Type Short amino acid …
SERMs are a class of compounds that selectively bind to estrogen receptors, acting as either agonists or antagonists depending on the tissue type. They’ve been widely used in medicine – and more recently studied in performance and hormone-related contexts. But what exactly are SERMs, and how do they differ from SARMs or anabolic steroids? What …
Bioavailability refers to how much of a compound actually reaches systemic circulation and becomes available for the body (or target tissue) to use. It’s one of the most important concepts in pharmacology, drug research, and compound formulation. Think of it like this:If you administer 100 mg of a substance, but only 40 mg makes it …
What It Means, How It Happens & Why It Matters in Research Endocrine disruption refers to the process by which external chemicals interfere with the body’s hormonal (endocrine) system – often with far-reaching health effects. These disruptors can mimic, block, or alter hormone signals, leading to changes in development, fertility, metabolism, or even behaviour. If …
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Glossary: What is IGF-1 (insulin-like growth factor 1)
IGF-1 (Insulin-like Growth Factor 1) is a powerful anabolic growth factor – a hormone naturally produced in the liver in response to growth hormone (GH) stimulation.
It plays a central role in:
Think of IGF-1 as the execution arm of growth hormone – GH gives the signal, IGF-1 gets the work done.
How IGF-1 Works (The Biological Pathway)
IGF-1 also enhances nutrient uptake, including amino acids and glucose, into muscle tissue.
Why Is IGF-1 Important?
IGF-1 is essential for normal human growth and recovery, especially during adolescence. In adults, it continues to regulate:
It also supports brain function, nerve regeneration, and immune modulation – making it relevant far beyond just fitness.
IGF-1 and Anabolism: Why Athletes Care
In performance circles, IGF-1 is sought after because of its:
It’s also central to how SARMs, GH peptides, and MK-677 (Ibutamoren) exert part of their effects.
Learn the differences: Are SARMs peptides?
IGF-1 vs Growth Hormone (GH): What’s the Difference?
Bottom line: GH gives the command – IGF-1 carries it out.
What Increases IGF-1 Naturally?
IGF-1 levels are often reduced in aging, calorie restriction, or chronic illness – which is why it’s explored in anti-aging and longevity research.
Learn more about increasing IGF with MK677
IGF-1 and Cancer Risk: The Double-Edged Sword
While IGF-1 promotes healthy tissue growth, excessive IGF-1 can also fuel unwanted cell proliferation – including cancer cells.
Epidemiological studies link very high IGF-1 levels with increased risk of:
This doesn’t make IGF-1 inherently dangerous – but it means context and control matter. Chronic elevation = risk.
IGF-1 in Supplements and Research
Some compounds used in research settings aim to increase IGF-1, including:
None of these should be used casually – they alter endocrine systems and carry side effect profiles.
Key Takeaways
FAQ about IGF-1 (Insulin-Like Growth Factor 1)
No. It’s a peptide hormone, not an anabolic steroid. It acts via the IGF-1 receptor – not the androgen receptor.
Further reading: Are SARMs steroids?
It helps build muscle, strengthen bone, repair tissues, and support metabolism – especially under the influence of growth hormone.
Yes – via sleep, training, protein intake, and blood sugar control. GH-releasing stimuli also help.
Endogenous (natural) IGF-1 is essential. However, long-term artificial elevation can pose risks, including potential cancer promotion.
Yes. It supports collagen synthesis, skin thickness, and wound healing – making it of interest in anti-aging protocols.
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Glossary: Peptide – What It Is & Why It Matters in Research and Fitness
Definition: A peptide is a short chain of amino acids linked by peptide bonds. In the body, peptides act as signalling molecules, controlling everything from hormone release to tissue repair. They’re smaller than proteins and are either naturally produced or synthetically engineered for therapeutic or research use. Quick Summary Term Peptide Type Short amino acid …
Glossary: SERMS
SERMs are a class of compounds that selectively bind to estrogen receptors, acting as either agonists or antagonists depending on the tissue type. They’ve been widely used in medicine – and more recently studied in performance and hormone-related contexts. But what exactly are SERMs, and how do they differ from SARMs or anabolic steroids? What …
Glossary: Bioavailability
Bioavailability refers to how much of a compound actually reaches systemic circulation and becomes available for the body (or target tissue) to use. It’s one of the most important concepts in pharmacology, drug research, and compound formulation. Think of it like this:If you administer 100 mg of a substance, but only 40 mg makes it …
Glossary: Endocrine Disruption
What It Means, How It Happens & Why It Matters in Research Endocrine disruption refers to the process by which external chemicals interfere with the body’s hormonal (endocrine) system – often with far-reaching health effects. These disruptors can mimic, block, or alter hormone signals, leading to changes in development, fertility, metabolism, or even behaviour. If …