IGF-DES
What it is
IGF-DES, also written as Des(1-3)IGF-1, is a truncated analog of insulin-like growth factor 1 (IGF-1) that is missing the first three N-terminal amino acids (glycine, proline, glutamate). It belongs to the peptide hormones and growth factors family and occurs naturally in some tissues, having first been isolated from sources such as bovine colostrum and human brain tissue in the early 1990s.
Research context and categorization
IGF-DES is generally grouped under growth factors, alongside IGF-1 and its other analogs. Because the removal of the N-terminal tripeptide sharply reduces its binding to IGF-binding proteins (IGFBPs), it is commonly discussed in relation to increased potency at the IGF-1 receptor and a very short duration of activity in solution. In laboratory settings it is investigated for its role in growth-factor receptor binding, intracellular signaling pathways, protein synthesis, and cell proliferation, and it is often studied in the context of cellular hypertrophy in cultured cell models. Reports describe it as being severalfold more potent than IGF-1 in stimulating cultured cells, a difference attributed to its reduced IGFBP binding. These uses are investigational and confined to in vitro and preclinical work. IGF-DES is not FDA-approved, and none of the research uses described here are confirmed or approved outcomes in humans or animals.
Status
- Regulatory status: Research-only, not FDA-approved. It is not approved for any medical indication and is handled as a research chemical.
- Sport status: Prohibited under the WADA Prohibited List. IGF-1 and its analogs fall under class S2, Peptide Hormones, Growth Factors, Related Substances and Mimetics, which is prohibited at all times, both in and out of competition.
Reconstitution notes (general)
Concentration equals the milligrams of peptide in the vial divided by the millilitres of solvent added. For example, a 1 mg vial brought up in 1 mL of solvent yields a concentration of 1 mg/mL, while the same vial in 2 mL yields 0.5 mg/mL. To check a target concentration against a given vial size and solvent volume, use the calculator at /pages/tools. Add solvent slowly down the inner wall of the vial rather than directly onto the powder, and let it dissolve without shaking.
Dilution and handling notes (compound-specific)
IGF-DES is a lyophilized (freeze-dried) powder that must be reconstituted before use. Unlike many research peptides, IGF-1 analogs such as IGF-DES are generally reconstituted in a mildly acidic solvent rather than plain bacteriostatic water. Commonly referenced media include dilute acetic acid (for example around 0.6%) or dilute hydrochloric acid (for example about 10 mM). The rationale is that the acidic environment protonates surface residues and improves solubility, whereas plain bacteriostatic water tends to leave the material poorly and slowly dissolved and can cause these particular peptides to aggregate, cloud, or precipitate. A working concentration of roughly 1 mg per 1 mL is often chosen for easy measurement and to limit the volume of acidic solvent. If a protocol calls for a neutral buffer, the usual pattern is to dissolve first in the acidic vehicle and then dilute into the target buffer, made fresh and gently since agitation and foaming can drive aggregation. Add solvent slowly and mix by gentle swirling or palm-rolling rather than shaking, as vigorous agitation adds shear that can damage the peptide. Dissolution may take from about 30 seconds up to a few minutes depending on concentration; allow the solution to clear fully before use.
Handling and storage
Store the reconstituted solution refrigerated at 2 to 8 C, kept out of direct light. Wipe the vial stopper with an alcohol swab before each withdrawal, and label the vial with the mix date. A refrigerated working window of roughly 4 weeks is commonly cited for reconstituted peptide solutions, and because the acidic reconstitution solvent lacks the benzyl alcohol preservative found in bacteriostatic water, some workers aliquot and freeze portions for longer-term holding. Discard the solution if it becomes cloudy or discolored, or if visible particles or floaters appear.
Related reading
Tools and supplies
- Reconstitution & blend calculators
- Bacteriostatic Water 30 ml
- Gansulin Metal Reusable Pen
- 3 ml Glass Cartridges (10-pack)
- Complete Starter Kit
For laboratory and research reference only. Educational content, not medical, dosing, injection, or therapeutic guidance, and not intended for human or animal use. Any research uses described are investigational and not confirmed or approved benefits. Confirm anything involving health with a licensed professional. References linked above.