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Forced degradation & stability-indicating methods

TL;DR

Forced degradation per ICH Q1A(R2) stresses the active under acid, base, oxidation (H₂O₂), thermal, humidity and photolytic (ICH Q1B Option 1 or 2) conditions to generate degradants. A stability-indicating method is then validated under ICH Q2(R2) to resolve and quantify those...

Forced degradation per ICH Q1A(R2) stresses the active under acid, base, oxidation (H₂O₂), thermal, humidity and photolytic (ICH Q1B Option 1 or 2) conditions to generate degradants. A stability-indicating method is then validated under ICH Q2(R2) to resolve and quantify those degradants — without which a stability claim is unsupported. Most supplement actives that fail late-stage stability fail because the assay was potency-only, not stability-indicating.

Regulatory anchors
  • ICH Q1A(R2)
  • ICH Q1B
  • ICH Q2(R2)
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