People taking hypothyroidism medication are advised to wait at least one hour after taking the medication before eating or drinking soy products such as miso soup, because soy can reduce thyroid-medicine absorption.
Notes on verification
Multiple reputable medical sources (Mayo Clinic, GoodRx, Healthline, UCLA Health) confirm soy can interfere with levothyroxine absorption and recommend spacing intake. [cascade flags: aggregator_dropped_primary_exists | tier=unverified indep_score=0.3 clusters=3 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- Is Miso Soup Good for You? Benefits, Nutrition & Risks - WebMD (seed:health_and_medicine)
- https://www.mayoclinic.org/diseases-conditions/hypothyroidism/expert-answers/hyperthyroidism/faq-20058188 (corroboration)
- https://www.goodrx.com/health-topic/thyroid/foods-to-avoid-while-taking-levothyroxine (corroboration)
- https://www.uclahealth.org/medical-services/surgery/endocrine-surgery/conditions-treated/thyroid/how-should-i-take-thyroid-hormone (corroboration)