Comparing QSC and Limitless Life for Sildenafil (Viagra) research compound supply. Key differences: purity verification, COA documentation, shipping, and catalog depth.
Factor
QSC
Limitless Life
Purity verification
QSC: Janoshik third-party COA every batch
Limitless Life: in-house or unspecified
HPLC purity
QSC: ≥99% confirmed
Limitless Life: claim varies
MS identity
QSC: Every batch
Limitless Life: not always documented
Shipping
QSC: USA·EU·UK·Canada·Australia
Limitless Life: availability varies
Catalog
QSC: 99 compounds
Limitless Life: narrower range
QSC submits every batch to Janoshik Analytical — independent third-party verification, publicly verifiable, every batch.
