SAFE — No Known Interaction
🟢 SAFE — Levothyroxine and DIM can be taken together safely.
Evidence level: LIMITED
Levothyroxine and DIM are safe to take together based on current evidence. No adverse interactions reported.
No clinically significant interaction between Levothyroxine and DIM has been identified in medical literature.
No interaction between Levothyroxine and DIM has been documented in clinical literature. Even so, always let your doctor and pharmacist know you're taking DIM — it helps them make better decisions about your care.
Take levothyroxine first thing in the morning on an empty stomach, 30-60 minutes before food. Take all other supplements and medications at least 4 hours later.
Higher risk for: elderly with cardiac conditions, those with adrenal insufficiency, recent thyroid dose adjustments, concurrent calcium/iron/antacid use (absorption interference), or narrow therapeutic index sensitivity.
Thyroid medication absorption may be affected by DIM. Watch for signs of reduced thyroid medication effectiveness: increased fatigue, weight gain, feeling cold, constipation, dry skin, hair thinning, or brain fog. Conversely, if the interaction boosts absorption: nervousness, rapid heartbeat, weight loss, tremors, or heat intolerance. Take thyroid medication on an empty stomach, at least 30-60 minutes before other supplements. When to seek emergency help: Chest pain, very rapid or irregular heartbeat, severe shortness of breath, or signs of thyroid storm (high fever, extreme agitation, racing heart).
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Safe combination at standard doses. Continue your medication as prescribed. Inform your doctor or pharmacist that you are using both, so they can monitor for any changes over time.
Levothyroxine and DIM are safe to take together based on current evidence. No adverse interactions reported.
Take levothyroxine first thing in the morning on an empty stomach, 30-60 minutes before food. Take all other supplements and medications at least 4 hours later.
Thyroid medication absorption may be affected by DIM. Watch for signs of reduced thyroid medication effectiveness: increased fatigue, weight gain, feeling cold, constipation, dry skin, hair thinning, or brain fog. Conversely, if the interaction boosts absorption: nervousness, rapid heartbeat, weight loss, tremors, or heat intolerance. Take thyroid medication on an empty stomach, at least 30-60 minutes before other supplements. When to seek emergency help: Chest pain, very rapid or irregular heartbeat, severe shortness of breath, or signs of thyroid storm (high fever, extreme agitation, racing heart).
Safe combination at standard doses. Continue your medication as prescribed. Inform your doctor or pharmacist that you are using both, so they can monitor for any changes over time.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Or browse the full interaction database (121,000+ pairs).