Limitless Capsules

Limitless Capsules combine four individually documented research compounds — Dihexa, Selank, Semax, and NAD+ — each studied in its own body of published literature for interaction with central-nervous-system and cellular-metabolic signaling pathways. Researchers combine peptides such as these to study multiple pathways in parallel; the summary below describes each component’s own published research individually. No combined-formulation study of this specific blend is described or implied.

What is in Limitless Capsules?

Dihexa

Dihexa is a small-molecule peptide derivative developed from angiotensin IV research, designed to cross the blood-brain barrier and studied for its interaction with the hepatocyte growth factor/c-Met signaling system. Published preclinical research, largely from the laboratory that first characterized the compound, has examined Dihexa’s association with synaptogenesis (new synapse formation) measures in cultured neurons and with spatial-memory performance in aged and lesioned rodent models. This literature remains at the early preclinical stage.

Selank

Selank is a synthetic heptapeptide analog of tuftsin, an immunoglobulin-G-derived fragment. Published research has examined Selank’s anxiolytic-like activity in animal and non-U.S. clinical study models, its association with hippocampal BDNF expression, and shifts in GABA/dopamine/serotonin-related gene expression reported in tested animal models. Clinical trials comparing Selank to benzodiazepine comparators have been conducted outside the United States.

Semax

Semax is a synthetic heptapeptide derived from a fragment of adrenocorticotropic hormone (ACTH(4-10)) that lacks hormonal activity. Published research, primarily from non-U.S. clinical and preclinical studies, has examined Semax’s association with BDNF and NGF expression measures, cognitive-performance measures in tested models, and neuroprotection-related outcomes in ischemia models.

NAD+

NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme present in all living cells, participating in redox reactions central to cellular energy metabolism, sirtuin-pathway signaling, and DNA-repair processes. Research has examined age-related decline in tissue NAD+ concentrations in animal models and its relationship to mitochondrial-function and cellular-aging measures.

Purity & Quality

First Class Science supplies Limitless Capsules at 99% purity, verified by independent third-party HPLC testing and mass spectrometry. A Certificate of Analysis is available for every batch at https://firstclassscience.com/certificate-of-analysis/. Store in a cool, dry place away from direct sunlight and moisture; keep out of reach of children.

Important: This item is manufactured strictly for research purposes. It is not intended for human or veterinary use and is distributed solely for laboratory and scientific investigation.

Research Applications

Neuropeptide & Cognitive-Signaling Research (Dihexa, Selank, Semax)

Each of these three peptides has been individually studied for interaction with central-nervous-system signaling pathways relevant to memory, learning, and stress-response measures in tested animal and, for Selank and Semax, non-U.S. clinical models. Researchers combine peptides with overlapping but distinct proposed mechanisms — synaptogenesis-related signaling for Dihexa, GABAergic modulation for Selank, and neurotrophic-factor induction for Semax — to study multiple CNS-related pathways in parallel; this is a research-design rationale, not evidence of a validated combined effect.

Cellular Metabolism Research (NAD+)

NAD+’s role as a required coenzyme for redox reactions, sirtuin activity, and DNA-repair signaling has made it a frequent subject of independent metabolic and cellular-aging research, described in more detail in First Class Science’s dedicated NAD+ product research summary.

Disclaimer: The research summarized above is drawn from third-party published studies conducted in animal, in vitro, or non-U.S. clinical contexts. It is provided for research and educational reference only and does not describe an intended use, effect, or benefit of this product for any person or animal.

⊗ ALL ITEMS ARE SOLD FOR RESEARCH USE ONLY. This category covers strictly in vitro laboratory testing and scientific experimentation. Content on this site is for education only and does not authorize human or animal use of any kind, which is prohibited by law. Only trained, licensed professionals should handle these materials. Nothing sold here qualifies as a drug, food, or cosmetic, and none of it may be labeled, advertised, or used as such.