Learn how to increase IGF-1 with sleep, protein, resistance training, and smart supplement choices, plus why lab tests and medical guidance matter.
The most reliable ways to increase IGF-1 are to eat enough protein and calories, sleep 7 to 9 hours per night, train with resistance consistently, and correct underlying medical problems such as hypothyroidism or liver disease. Insulin-like growth factor 1 (IGF-1) is a hormone the liver produces in response to growth hormone, and it moves slowly, usually over weeks to months rather than days. No over-the-counter pill has been proven to raise IGF-1 in healthy adults.
What IGF-1 Does and What Controls It
IGF-1 helps children grow and, in adults, supports muscle repair, bone density, and normal glucose metabolism. Growth hormone released by the pituitary gland signals the liver to make most of the IGF-1 circulating in your blood.
Because IGF-1 sits at the end of that chain, anything that suppresses growth hormone output or impairs liver function tends to lower it as well.
- Age: IGF-1 peaks in the late teens and declines gradually after about age 30.
- Nutrition: chronic undereating, very low protein intake, and prolonged fasting all lower IGF-1.
- Sleep: the largest growth hormone pulses happen during deep sleep.
- Medical conditions: hypothyroidism, uncontrolled diabetes, liver disease, celiac disease, and growth hormone deficiency reduce IGF-1.
Lab results are reported against age- and sex-matched reference ranges, so an IGF-1 value only means something when a clinician interprets it alongside your symptoms and history.
Diet Changes That Support Higher IGF-1
Protein is the strongest dietary lever on IGF-1. When protein or total calories drop sharply, IGF-1 falls within days, which is part of why aggressive crash diets cost muscle and bone.
What to prioritize
- Protein: roughly 1.2 to 1.6 grams per kilogram of body weight per day for most adults, spread across meals.
- Complete protein sources: eggs, dairy, fish, poultry, lean red meat, and soy.
- Enough calories: avoid long stretches of severe calorie restriction.
- Micronutrients: zinc, vitamin D, and magnesium deficiencies are associated with lower IGF-1.
People following strict vegan diets often have lower IGF-1, largely because total protein and leucine intake tend to be lower. If you also care about antioxidant status, some of the same habits, including eating enough protein and sleeping well, show up in guides on how to increase glutathione, although IGF-1 and glutathione are separate systems.
Training, Sleep, and Body Composition
Hard resistance training produces a short-term rise in growth hormone and IGF-1, and months of consistent training can raise baseline IGF-1 by improving body composition and insulin sensitivity.
- Train 3 to 4 days per week with progressive overload.
- Build sessions around compound lifts: squats, deadlifts, presses, and rows.
- Cap extreme endurance volume, especially while eating in a calorie deficit.
- Sleep 7 to 9 hours per night and keep a consistent schedule.
- Maintain a healthy body fat level, because very low body fat suppresses the growth hormone axis.
Body composition matters in both directions. Obesity is linked with lower growth hormone output, while extreme leanness lowers IGF-1 as well.
Supplements and Peptides Marketed for IGF-1
Most search traffic around IGF-1 comes from bodybuilding supplements and research peptides, and the marketing usually outruns the evidence. Oral IGF-1 is not effective because it is a protein that gets digested in the stomach before it can reach the bloodstream.
A common query is how does igf 1 lr3 work, and the honest answer is that IGF-1 LR3 is a modified research peptide that is not FDA-approved for human use and has not been tested in large controlled human trials. Deer antler velvet is marketed as a natural IGF-1 source, but its IGF-1 content and oral bioavailability are not established.
| Approach | What the evidence shows | FDA status for raising IGF-1 |
|---|---|---|
| Adequate protein and calories | Consistently raises IGF-1 in people who were underfed | Not a drug |
| Resistance training | Acute spikes plus modest long-term increases | Not a drug |
| Sleep optimization | Supports normal growth hormone pulses | Not a drug |
| Correcting zinc or vitamin D deficiency | Can normalize low IGF-1 when a deficiency exists | Not a drug |
| Oral IGF-1 or deer antler velvet | No reliable evidence of a meaningful rise | Not approved |
| MK-677 (ibutamoren) | Raises IGF-1 in trials, but safety data are limited | Not approved |
| CJC-1295 with ipamorelin | Can raise IGF-1; prescription-only when legitimate | Not approved as a combination product |
| IGF-1 LR3 | Research use only; human safety data are lacking | Not approved |
People searching how to get cjc-1295 ipamorelin are usually looking at growth hormone releasing peptides, which can raise IGF-1 on a blood test but are prescription-only in the United States and are often sold as unregulated research chemicals. Instructions on how to reconstitute cjc 1295 or how to mix bac water with peptides are easy to find online, yet dosing errors, contamination, and unknown purity are real risks with any gray-market vial.
How to Check IGF-1 and When to See a Doctor
If you suspect low IGF-1, the appropriate first step is a doctor-ordered blood test rather than a supplement. IGF-1 is usually measured with a single fasting blood draw, and results are compared with age- and sex-specific ranges.
- Symptoms of adult growth hormone deficiency include low muscle mass, increased waist fat, fatigue, and poor exercise tolerance.
- Your clinician may also check IGFBP-3, thyroid function, liver enzymes, and glucose.
- Treatable causes such as hypothyroidism, celiac disease, and malnutrition should be ruled out first.
Higher IGF-1 is not automatically better. Persistently elevated IGF-1 causes acromegaly and is associated with higher rates of several cancers in observational studies, so raising IGF-1 without a medical reason carries real downside.
Talk with a healthcare professional before using any hormone, peptide, or supplement marketed to change IGF-1, especially if you have a personal history of cancer or pituitary disease.
Frequently Asked Questions
How can I increase my IGF-1 naturally?
The most effective natural steps are eating enough protein and total calories, sleeping 7 to 9 hours, and lifting weights 3 to 4 times per week. Correcting deficiencies in zinc, vitamin D, or magnesium can help if you are actually low in them. These changes typically shift IGF-1 over several weeks to months, not overnight.
Do IGF-1 supplements actually work?
No oral IGF-1 supplement has been proven to raise blood IGF-1 in healthy adults, because IGF-1 is a protein that is digested in the stomach. Deer antler velvet is marketed as an IGF-1 source, but its IGF-1 content and absorption are not established, and it is not FDA-approved for that use. Injectable IGF-1 products sold online are unapproved research chemicals.
What lowers IGF-1 the most?
Severe calorie restriction, very low protein intake, and prolonged fasting lower IGF-1 quickly and significantly. Medical conditions such as hypothyroidism, liver disease, celiac disease, uncontrolled diabetes, and growth hormone deficiency also reduce IGF-1. Very low body fat and poor sleep further suppress the growth hormone signals that drive IGF-1 production.
This page provides educational research information and does not replace medical advice, diagnosis, or treatment.