IGF-1 vs NAD+
IGF-1 and NAD+ are studied in overlapping research areas, which is why they are frequently compared. This is a neutral side-by-side reference drawn from published preclinical literature and laboratory handling data.
How they actually differ
Comparing the two: IGF-1 is 70-residue single-chain protein (native igf-1), three disulfide bonds, while NAD+ is dinucleotide coenzyme — not a peptide — different molecular classes with different handling consequences; they call for different primary diluents (dilute acetic acid for initial dissolution versus sterile or bacteriostatic water); their leading degradation routes differ (misfolding and irreversible denaturation for IGF-1, alkaline hydrolysis for NAD+), so the storage precautions that matter are not the same; their practical working windows differ once reconstituted. The sections below set out each in full.
IGF-1 — origin
IGF-1 is the native insulin-like growth factor — a folded 70-amino-acid protein stabilised by three internal disulfide bonds. It is the downstream messenger produced after growth hormone acts, and it is handled as a protein rather than a short peptide. This is the native sequence, distinct from the long-acting LR3 analogue.
NAD+ — origin
NAD+ is not a peptide at all, and that single fact governs everything about how it is handled. It is a dinucleotide coenzyme — nicotinamide and adenine linked through a pyrophosphate bridge — present in every living cell and central to redox metabolism. It was first identified in 1906 by Arthur Harden as a small heat-stable factor required for yeast fermentation.
IGF-1 research themes
Studied as the native ligand for the IGF-1 receptor and its downstream proliferation and survival pathways.
Examined in muscle research models for its role in satellite-cell behaviour and anabolic signalling.
Compared with IGF-1 LR3, whose reduced binding-protein affinity gives a longer active window — a contrast studied directly in the literature.
NAD+ research themes
Sirtuins consume NAD+ as a co-substrate, which links cellular NAD+ availability directly to their activity.
Its canonical role as the central redox carrier of cellular respiration.
PARP enzymes consume NAD+ during DNA damage response, a heavily studied competing demand.
A major driver of current research interest: measured NAD+ levels fall with age across tissues in animal models.
IGF-1 handling
- Dissolve first in dilute acetic acid, then dilute into the working buffer — never expect plain water to take it up fully.
- Use a carrier protein and low-bind labware to prevent adsorptive loss.
- Aliquot for single use; do not re-freeze reconstituted protein.
NAD+ handling
- Allow the sealed vial to reach room temperature before opening — opening a cold vial of hygroscopic material condenses water directly onto it.
- Keep solutions at or below neutral pH; alkaline conditions destroy NAD+ quickly.
- Prepare fresh solutions where concentration accuracy is important rather than relying on stored stock.
- Protect from light at all stages.
Both third-party tested
Every Popular Peptides batch of IGF-1 and NAD+ is independently tested by HPLC and LC-MS with a published Certificate of Analysis. Enter a lot number to pull the COA for a specific vial.
IGF-1 reference
Related comparisons
IGF-1 and NAD+ are supplied strictly as research chemicals for in-vitro laboratory and research use only. They are not intended for human or animal consumption, diagnostic, or therapeutic use. This comparison summarizes published preclinical literature and laboratory handling data; it is not medical advice, not a claim of efficacy, and not usage guidance.