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Take Synthroid with water only on an empty stomach. Take Synthroid 4 hours before or after. taking iron or calcium supplements, or antacids. Soy, cottonseed meal, walnuts, fiber, and. grapefuit juice can affect the absorption of Synthroid.
Even a brief brisk walk of 5 minutes daily will get the synthroid working faster, feeling the effects on an increased metabolism in just a week to ten days. VERY important to take on empty stomach and wait for half an hour before eating or drinking.