Every Follistatin 344 COA we've seen

Cross-vendor view of every Certificate of Analysis for Follistatin 344: purity distribution, test coverage gaps, recent batches. Sourced back to the original COAs.

Open methodology Lab-verified only No paid placements

COAs ingested

Vendors

99.50%

Avg purity±0.00%

50%

Endotoxin tested

Tested by

Vanguard Laboratory1 COA Janoshik Analytical1 COAA

Purity over time

Each dot is one COA. Color = vendor. The dashed line is a recency-weighted rolling mean (6-month half-life) — it tells you whether testing is trending up or down across the corpus, independent of which vendors happen to have published most recently. Tightly clustered points across many vendors = either real consistency or rubber-stamping; check the individual labs.

Not enough data points to chart yet (need 2+ extracted COAs with both a tested date and a purity result).

By vendor

Vendor	COAs	Avg purity	MS	Endotoxin	Sterility	Metals	Latest
Peptidology	1	99.50%	—

Recent batches

Vendor	Lab	Lot	Purity	Tested
Peptidology	Vanguard Laboratory	1668	99.50%	2026-03-26	View
Peptidegurus	Janoshik Analytical	—	—	2026-01-12	View