Magnesium supplements can bind to levothyroxine in the digestive tract, potentially reducing absorption.
Taking magnesium at least 4 hours apart from thyroid medication helps avoid this interaction.
Gabapentin and Pregabalin
These medications for nerve pain and seizures may have reduced absorption when taken close to magnesium supplements.
Separating doses by a few hours is a common strategy.
Other Supplements That May Compete with Magnesium Absorption
High doses of certain minerals can create magnesium interactions at the absorption level:
3 Teas
Zinc: Very high zinc intake may reduce magnesium absorption.
Calcium: Magnesium and calcium share absorption pathways; extremely high doses of either can interfere with the other.
Iron: Large magnesium doses might slightly lower iron absorption.
Staggering these supplements throughout the day often resolves minor competition.
Safe Practices for Magnesium Supplementation
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