They include synthetic thyroid hormones levothyroxine (Synthroid, Unithroid, others) and liothyronine (Cytomel), as well as thyroid extract supplements
Walnuts, grapefruit juice, and dietary fiber can also make Synthroid less effective
Many different substances (foods and minerals such as calcium, aluminum and magnesium) are known to decrease Synthroid (levothyroxine) absorption if taken at the same time
However, be careful not to just take a general multivitamin along with levothyroxine
Sometimes I take my thyroid pill with my cereal and milk, coffee, juice and vitamins
This is important: You must take Synthroid and levothyroxine on an empty stomach
Vitamin C: There’s some research that vitamin C improves absorption of levothyroxine, but the evidence isn’t conclusive
Medication such as cholesterol-lowering drugs (eg cholestyramine, colestipol) can affect the absorption of levothyroxine
Crestor or statin drugs (HMG CoA Reductase
Our objective was to study the effect of vitamin C on the absorption of l-T4 in patients with hypothyroidism and gastritis