Molecular Structure Explorer
SHB Blend
Structure of the compound covered in this guide.
Verified structure pending review
Last reviewed: October 2026 · Cleared Peptides research team
Research use only. SHB Blend: Components and Biochemical Notes is supplied for laboratory research. It is not a drug, food, cosmetic, or dietary supplement. It is not FDA-approved. It is not for human or veterinary administration. This page does not give a dose or a method of administration. A study cited on this page describes that study’s own test article. It does not make this lot an approved medicine. To check a fact, open the PubMed or DOI link, confirm the authors and year, and match the paper’s compound name, CAS number, or sequence to the specification table. The full method is on the research desk page. Identity and purity for a lot are only what that lot’s certificate of analysis reports. An HPLC percentage is not a sterility result and not an endotoxin result unless the certificate prints those tests.
SHB is an aqueous research blend of amino acids and L-carnitine. This page names each component and a published biochemical pathway.
Component names match the product record. A CAS number is included only when the named chemical form has a public registry entry. Pathway notes describe published biochemistry. They are not statements of benefit or use.
Components
| Component | CAS number | Published biochemical note |
|---|---|---|
| L-Arginine | 74-79-3 | A substrate of nitric oxide synthase and a urea-cycle intermediate. |
| L-Ornithine | 70-26-8 for the free amino acid. A hydrochloride salt has a different CAS. | A urea-cycle intermediate and a precursor in polyamine biosynthesis pathways. |
| L-Citrulline | 372-75-8 | A urea-cycle intermediate converted to arginine in the published citrulline–arginine pathway. |
| L-Lysine | 56-87-1 | An essential amino acid that is also a precursor in the published carnitine biosynthesis pathway. |
| L-Glutamine | 56-85-9 | A nitrogen donor in published nucleotide-biosynthesis pathways. |
| L-Proline | 147-85-3 | An amino acid that is a repeating residue in collagen sequences. |
| Taurine | 107-35-7 | A sulfur amino acid described in osmolyte and bile-acid conjugation pathways. |
| L-Carnitine | 541-15-1 | Described as a carrier in mitochondrial long-chain fatty-acyl transfer. |
| N-Acetylcysteine | 616-91-1 | An acetylated cysteine that is a substrate in published glutathione biosynthesis pathways. |
Solubility of the finished aqueous blend is a property of that formulation and is not given a single public figure here. See the lot COA.
Other names
SHB is the Cleared Peptides catalog name for this aqueous blend. It is not one peptide and it does not have one CAS number. Each row in the component table is a separate chemical.
Published pathways for the components
The notes below describe published enzyme pathways for the named chemicals. They are not studies of this blend as one substance, and they are not statements of benefit or use.
L-Arginine (CAS 74-79-3) is described as a substrate of nitric oxide synthase. L-Citrulline (CAS 372-75-8) is described in that same reaction path and as a urea-cycle intermediate that published enzyme routes convert toward arginine. L-Ornithine (CAS 70-26-8 for the free amino acid) is the other urea-cycle intermediate named in this blend. A hydrochloride salt of ornithine is a different registry entry, so the lot COA is the salt record.
L-Lysine (CAS 56-87-1) is an essential amino acid. The published carnitine biosynthesis route begins with methylation of lysine. L-Carnitine (CAS 541-15-1) is then described as the carrier that transfers long-chain fatty acyl groups across the inner mitochondrial membrane. Those are two steps in published biochemistry, not a claim about this mixture.
L-Glutamine (CAS 56-85-9) is described as a nitrogen donor in nucleotide-biosynthesis pathways. L-Proline (CAS 147-85-3) is the residue that repeats in collagen sequences; that is a structural fact about the amino acid. Taurine (CAS 107-35-7) is a sulfur amino acid described in bile-acid conjugation. N-Acetylcysteine (CAS 616-91-1) is an acetylated cysteine that published pathways use as a substrate toward glutathione. See also the L-carnitine guide.
Analytical testing notes for SHB Blend
SHB Blend is identified in this guide. An identity test compares a measurement with those values. A mass spectrum is the usual measurement for a peptide. FTIR, when a certificate uses it, is a supporting infrared fingerprint and is less specific for closely related sequences.
This page compares more than one component. A single purity percentage is ambiguous unless the certificate says whether each component was resolved, identified, and quantified. Identity and content should be traceable to each named material. A chromatogram with several intentional peaks is expected; those peaks are not automatically impurities.
HPLC purity for this material is an area-percent result at the wavelength and gradient the laboratory states, commonly ultraviolet detection near 214 nm on a reversed-phase column. The instrument is a gradient pump, injector, column oven, and UV or diode-array detector. That percentage is not the number of milligrams in the vial. Water, acetate, trifluoroacetate, and other UV-silent material can dominate the gross weight while the purity figure stays high. Net peptide content, from an assay or amino-acid analysis, is the separate result to read when the certificate reports it.
A sterility test and an endotoxin test are not included in a chemical purity result. The compendial sterility test is a culture method (USP <71>): membrane filtration or direct inoculation into fluid thioglycollate medium and soybean-casein digest medium, incubated for 14 days. A PCR sterility screen uses a thermal cycler to detect microbial DNA and is a different method. The endotoxin test (USP <85> LAL, or USP <86> recombinant Factor C) reports endotoxin units with an incubating reader or a cartridge reader. Use a result only when that method is printed on the lot certificate. One published example in this catalog states that the report does not cover microbial contamination or endotoxins. The full description of equipment, standards, and how US laboratory accreditation works is in peptide analytical testing. Lot records are on the COA page.
Frequently Asked Questions
Is SHB one compound?
No. SHB is a catalog name for a blend of amino acids and L-carnitine. Each component has its own CAS number.
What does the catalog name mean?
SHB identifies this Cleared Peptides blend. It is not a CAS name and not a second chemical identity.
Is the SHB blend for human use?
No. It is supplied for laboratory research use only and is not for human or veterinary use.
Selected References
Peer-reviewed literature listed as scientific background for laboratory researchers. Citation does not imply endorsement by the authors, and it is not a statement of benefit or use. These papers do not study the finished blend as a single substance.
- Förstermann U, Sessa WC. Nitric oxide synthases: regulation and function. Eur Heart J. 2012;33(7):829-837. Cited here only for the enzyme fact that nitric oxide synthase uses L-arginine as a substrate and requires NADPH, FAD and FMN as cofactors. PubMed 21890489 · DOI
- Bremer J. Carnitine—metabolism and functions. Physiol Rev. 1983;63(4):1420-1480. Cited here for carnitine as a carrier of long-chain acyl groups across the inner mitochondrial membrane, and for methylation of lysine in the published carnitine biosynthesis route. PubMed 6361812
Research Use Only Notice
This guide is provided for educational and laboratory reference purposes. It summarizes published structural and biochemical literature. It does not describe, recommend, or imply any use in humans or animals. Products sold by Cleared Peptides are for laboratory research use only. They are not drugs, foods, cosmetics, or dietary supplements, are not FDA-approved, and are not intended to diagnose, treat, cure, mitigate, or prevent any disease. No dosing, administration, or use instructions are provided.
