Frequently Asked Questions

For Research Use Only (RUO) means a product is intended exclusively for laboratory and scientific research by qualified researchers. These compounds are not for human or animal use, are not dietary supplements, and are not approved by the FDA. They are not intended to diagnose, treat, cure, or prevent any disease or condition. By purchasing, you confirm you are acquiring the material for legitimate research purposes only.

The compounds in our catalog are tested by a third-party laboratory for identity and purity, and we publish those Certificates of Analysis (COAs) in our COA Vault so you can review the results before you buy. Most COAs are commissioned through our suppliers; one compound (KPV) currently carries a manufacturer-issued COA while a fresh third-party report is pending, and its vault entry is labeled accordingly. We are also working toward in-house commissioned testing as the next step.

A Certificate of Analysis (COA) reports what a laboratory found when it analyzed a specific lot. Identity testing (often by mass spectrometry) confirms the material matches the compound on the label. Purity testing (often by HPLC) reports the percentage of the target compound in the sample. The report also lists the lot or batch number, the test date, and the analytical methods used. Reading the identity result, the purity percentage, and the lot number together tells you what was tested and when.

191AA refers to somatropin, a full-chain recombinant sequence of 191 amino acids. AOD-9604 is a modified peptide corresponding to the HGH Fragment 176-191 region. They are distinct compounds and are commonly confused because both relate to growth-hormone research. This is provided as educational compound information only; 191AA is not currently part of the Double Helix Labs catalog.

We currently accept Venmo, Zelle, and CashApp. Payment instructions are provided at checkout and in your order email. Please do not reference product names or compounds in your payment note.

Domestic U.S. shipping is a $9.99 flat rate. Shipping is free on orders over $125, and free on all orders delivered to Seminole, Texas (ZIP 79360) regardless of order total. Orders ship from Seminole, Texas, typically within 1 to 3 business days, and tracking is emailed when the order ships. Lyophilized compounds are shipped at room temperature in protective packaging.

Email us at info@doublehelixlabs.pro. We are a small West Texas operation and a real person answers — typically within 24 hours. We are not able to provide guidance on human use of any compound.

We ship to domestic U.S. addresses, but research chemical regulations vary by jurisdiction. We do not ship to jurisdictions where the purchase or possession of a given compound is restricted, and orders placed from restricted areas will be cancelled and refunded. It is the purchaser's responsibility to confirm that the compounds they order are legal to purchase and possess in their jurisdiction.

A peptide is a short chain of amino acids. In a research context, research peptides are used as reference materials and study subjects in laboratory work — for example in in-vitro (cell culture) and preclinical (animal model) research described in the published literature. Compounds sold by Double Helix Labs are supplied for that kind of laboratory research only and are not for human use.

These are general laboratory handling recommendations, not personal-use instructions. Lyophilized (freeze-dried) peptides are typically kept frozen, often around -20°C, and protected from light and moisture. Once a compound has been reconstituted in the laboratory, the resulting solution is generally refrigerated and kept for a limited period appropriate to the research protocol. Always follow your institution's handling and safety guidance.