HRV Monitoring: What It Measures and Why Researchers Track It
What HRV actually measures Heart rate variability (HRV) is the variation in time between successive heartbeats (R-R intervals). Counter-intuitively, higher HRV is generally a marker of better health and adaptability — a heart that varies its beat-to-beat timing is one that is responding flexibly to physiological demands, not a sign of arrhythmia. HRV reflects the […]
MOTS-c
What is MOTS-c? MOTS-c (mitochondrial open reading frame of the 12S rRNA type-c) is a 16-amino-acid peptide encoded within the mitochondrial genome — specifically, in the MT-RNR1 gene that encodes the 12S ribosomal RNA. It was identified in 2015 by Lee et al. as the first known mitochondria-derived peptide (MDP) with a clear signalling function […]
Epithalon
What is Epithalon? Epithalon (also AEDG, after its single-letter amino acid code Ala-Glu-Asp-Gly) is a synthetic tetrapeptide developed in the late 1990s by Russian gerontologist Vladimir Khavinson and colleagues at the St. Petersburg Institute of Bioregulation and Gerontology. The compound was derived from a longer pineal-gland extract (Epithalamin) that had earlier shown biological activity in […]
Ipamorelin
What is Ipamorelin? Ipamorelin is a synthetic pentapeptide (five amino acids) growth hormone secretagogue (GHS) developed by NovoNordisk’s research division in the 1990s. Its sequence is Aib-His-D-2-Nal-D-Phe-Lys-NH₂, where Aib is α-aminoisobutyric acid (a non-proteinogenic amino acid) and D-2-Nal is D-2-naphthylalanine. Molecular weight is approximately 712 Da. Ipamorelin is one of several GHS compounds studied as […]
BPC-157 + TB-500
The synergy hypothesis The combination of BPC-157 and TB-500 is one of the most popular pairing rationales in the off-label peptide space. The hypothesis: that two tissue-repair peptides with non-overlapping mechanisms can produce additive or synergistic effects on recovery. The mechanistic premise is real. BPC-157 and TB-500 act on different primary targets — BPC-157 on […]
TB-500 (Thymosin Beta-4 fragment)
What is TB-500? TB-500 is the laboratory name for a synthetic fragment of Thymosin Beta-4 (Tβ4) — specifically, the central actin-binding domain comprising amino acids 17–23 of the parent 43-residue protein. The full-length Tβ4 protein is one of the most abundant actin-sequestering peptides in mammalian cells; the synthetic fragment is the active core used in […]
BPC-157
What is BPC-157? BPC-157 (Body Protection Compound-157) is a synthetic pentadecapeptide — a chain of fifteen amino acids — derived from a sequence found in human gastric juice, where the parent protein BPC (also called “bpc” or PL-10 in older literature) was originally isolated. The compound is frequently referred to as a “stable gastric pentadecapeptide” […]