01 / DESIGN
What was studied?
Investigators compared precipitation methods, assay media and labels using model peptides in plasma and cell-culture supernatants.
02 / FINDINGS
What did the researchers report?
Recovery and degradation patterns differed substantially. Strong-acid precipitation caused losses in the tested workflow, while labeling choice also affected interpretation.
03 / LIMITS
How should it be interpreted?
Apparent disappearance can reflect sample handling as well as degradation. A stability result needs its matrix, recovery method and analytical controls rather than a percentage alone.
Loti Labs Peptide editorial reading note. Based on the linked source record. Methods and corrections.