Reviewed by the PeptideMind Team · Updated July 15, 2026

MGF Dosage Guide, Benefits & Side Effects

MGF activates dormant muscle satellite cells after training damage, supporting new fiber formation and recovery. See mechanism and research.

Chemical Makeup

24

Amino Acids

MGF

Tyr

Y

Position 1

Gln

Q

Position 2

Pro

P

Position 3

Pro

P

Position 4

Ser

S

Position 5

Thr

T

Position 6

Asn

N

Position 7

Lys

K

Position 8

Asn

N

Position 9

Thr

T

Position 10

Lys

K

Position 11

Ser

S

Position 12

Gln

Q

Position 13

Arg

R

Position 14

Arg

R

Position 15

Lys

K

Position 16

Gly

G

Position 17

Ser

S

Position 18

Thr

T

Position 19

Phe

F

Position 20

Glu

E

Position 21

Glu

E

Position 22

His

H

Position 23

Lys

K

Position 24

Amino acid sequence
TyrosinePosition 1
GlutaminePosition 2
ProlinePosition 3
ProlinePosition 4
SerinePosition 5
ThreoninePosition 6
AsparaginePosition 7
LysinePosition 8
AsparaginePosition 9
ThreoninePosition 10
LysinePosition 11
SerinePosition 12
GlutaminePosition 13
ArgininePosition 14
ArgininePosition 15
LysinePosition 16
GlycinePosition 17
SerinePosition 18
ThreoninePosition 19
PhenylalaninePosition 20
Glutamic acidPosition 21
Glutamic acidPosition 22
HistidinePosition 23
LysinePosition 24

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MGF Dosage Guide for Muscle Growth

MGF helps stimulate muscle repair after exercise and is injected under the skin or into the muscle.

Vial size

2 mg

Bacteriostatic water

1 mL

Dosing

200–400 mcg

Frequency

2×/week

Cycle

4–6 weeks

Benefit

Muscle Growth

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What is MGF?

MGF (Mechano Growth Factor) is a natural growth factor your muscles produce locally in response to exercise or injury; it's actually a variant of IGF-1 made specifically by stressed muscle tissue. It works by activating the muscle's own repair cells, helping them multiply and rebuild damaged fibers. It's used mainly in research and by performance-focused individuals interested in faster muscle recovery and growth.

Growth

Research targets include growth hormone signaling, IGF-1 pathways, and tissue development.

Healing

Research targets include tissue repair, wound healing, and recovery from injury.

Growth

mgf

Healing

Is MGF FDA approved?

MGF is not an FDA-approved drug. It is intended for research purposes only and is not approved for human consumption, diagnostic, or therapeutic use.

Research Use Only

MGF has not been evaluated by the FDA for safety or efficacy in humans.

No Clinical Oversight

Not manufactured under FDA-regulated quality or clinical standards.

Unregulated Sourcing

Purity, dosing, and sourcing are not verified through FDA testing or oversight.

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How Does MGF Work?

Unlike related growth factors, it works through its own separate signaling pathway to wake up and multiply the muscle's own repair cells (satellite cells) after exercise or injury. This lets muscle grow new fibers and add new repair capacity, rather than just making existing fibers bigger.

Own separate pathway

Works through its own signaling route, unlike related growth factors.

Wakes up repair cells

Activates and multiplies the muscle's own satellite (repair) cells.

Grows new fibers

Lets muscle add new fibers and repair capacity, not just bigger existing ones.

MGF Targeted areas

How to reconstitute MGF

View guide

The materials you'll need and step-by-step instructions for safely mixing MGF with bacteriostatic water.

Materials needed

Your MGF vial (lyophilized)

Alcohol swabs

Bacteriostatic sterile water

3 mL syringes (Luer Lock tip)

25G or 27G needles (Luer Lock). Other gauges may also be acceptable.

Sharps container (optional)

1

Remove the caps

Remove the caps from both your MGF vial and your bacteriostatic water vial.
2

Sanitize the rubber stoppers

Wipe down the rubber stoppers on both vials with alcohol swabs and let them dry for about 3 minutes.
3

Attach the needle

Take your 3 mL syringe and needle. Twist the needle's plastic hub into the Luer Lock tip on the syringe to secure it.
4

Draw the bac water

Pull back on the plunger to draw your desired volume of bacteriostatic water. If you overfill, just push the excess back in until you reach the right marker on the syringe.

How much bac water? MGF typically comes in a 2 mg vial. We recommend 1 mL of bacteriostatic water, though anywhere between 1 mL and 3 mL is acceptable. For larger vials you can use up to 5 mL — more bac water makes microdosing easier, but insulin needles usually max out at 1 mL per injection. That means a lot of bac water might force you into multiple injections to hit your target dose. Unless you're microdosing, 2 mL per vial is a solid rule of thumb.
5

Insert the needle into the MGF vial

With the bac water in your syringe, insert the needle into the MGF vial at a slight angle to avoid pressure buildup.

Use a thin needle: Stick to 25G or higher to avoid damaging the rubber stopper. Higher gauge means a thinner needle.
6

Release the water gently

Let the water run gently down the side of the vial. Don't inject it forcefully.

Heads up: Sometimes the plunger pushes itself in as soon as the needle enters the vial. Hold the plunger back so you have full control over how fast the bac water enters.
7

Swirl to dissolve

Avoid shaking. Gently swirl, flip, and roll the vial to dissolve the powder.

Be patient: This usually takes 2 to 5 minutes of consistent swirling, mixing in a circular motion, and gently flipping the vial up and down. The water needs to run through the powder many times to fully dissolve it. Don't shake or get aggressive with it.
8

Check for full dissolution

The solution should be clear with no visible particles. If it's cloudy or clumpy, wait a minute and repeat the swirling step.
9

Cap, dispose, and store

Once you're done, cap the needle and dispose of it (ideally in a sharps container). Store the reconstituted MGF vial in the fridge whenever it's not in use. It will stay good for approximately 30 days.

How to Store MGF

Freeze the dry powder for up to a year; it can handle room temperature for 3–4 weeks. Once mixed with liquid, refrigerate and use within 10–14 days, avoiding repeated freezing and thawing.

Lyophilized Storage

-20°C or below for up to 1 year; stable at room temperature for 3–4 weeks.

Reconstituted Storage

Refrigerate at 2–8°C and use within 10–14 days.

Handling Notes

Avoid repeated freeze-thaw cycles.

A smartphone displaying a "Storage Guide" for peptides, indicating a safe storage temperature range of 2–8°C, with warnings to keep away from light, heat, and freezing. The background is light blue, and additional tips on protecting the peptides are visible below the temperature range.

What Are the Benefits of MGF?

What research says it may help with, and how it works in the body.

muscle repair

Its main effect is waking up dormant muscle stem cells (satellite cells), which then merge into damaged muscle fibers to repair them.

Because it breaks down quickly in the body, its effects stay concentrated near where it's injected.

The body naturally produces more of it after muscle strain from exercise; taking extra may boost the repair process further.

tissue regeneration

Research suggests it may support bone healing by regulating bone-building cells (osteoblasts).

Animal studies suggest it may improve healing outcomes for tendon injuries when applied directly to the injury site.

What Are the Side Effects of MGF?

Who should avoid it, warning signs to watch for, and what to know before combining it with other compounds.

Who Should Avoid It

Any history of cancer or neoplastic disease

Pregnancy or breastfeeding

Uncontrolled diabetes

Stop Right Away If You Notice

Any unusual growths, lumps, or rapid tissue changes

Severe injection site reactions

Persistent headaches or vision changes

Signs of hypoglycemia

Milder Signs to Watch For

Collapsed or discolored powderPersistent cloudiness or visible particles
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How Long Should a MGF Cycle Last?

This breaks down how long a typical MGF cycle runs and what research suggests happens at each stage. Research shows that staying on a peptide continuously, without a break, may make it less effective over time.

That's why most research protocols build in a break between cycles, often called a washout period, to let the body reset before starting again.

Week 0-0
Very short half-life means localized effects at injection site within minutes
Week 1-2
Reduced muscle soreness in targeted areas; subtle recovery improvements
Week 4-8
Improved recovery in targeted muscles; enhanced training capacity

Cheat Sheets Featuring MGF

See how MGF fits into a broader research stack with these free downloadable cheat sheets. Each one includes reference dose ranges, dosing frequency, and half-life for every peptide it covers. For research purposes only.

View all
Growth Hormone Peptide Cheat Sheet
Growth Hormone Peptide Cheat Sheet

13 peptides

Healing & Recovery Peptide Cheat Sheet
Healing & Recovery Peptide Cheat Sheet

18 peptides

Master Peptide Cheat Sheet
Master Peptide Cheat Sheet

78 peptides

MGF Research References

It is a preclinical compound

2Research references

MGF

MGF is a preclinical compound

MGF-E Peptide Human Muscle Cell Study

MGF significantly increased satellite cell proliferation at 3ng/ml with age-dependent effects.

2011

Mechano-Growth Factor Minireview

Overview of MGF as IGF-I gene product involved in tissue repair, upregulated following exercise and injury.

2010

Frequently Asked Questions About MGF

Straight answers on reconstitution, dosing, and safety, everything you need to research with confidence. For research reference only.