How Will the Keystone XL Pipeline Be Built? If President Obama approves the hot-button Keystone XL pipeline, TransCanada has plenty of work to do to build the Montana-to-Nebraska connection. This is how its engineers plan to do it.
Side effects of a dose of levothyroxine that is too low would be similar to the symptoms of hypothyroidism. Symptoms of hypothyroidism, or underactive thyroid, include fatigue, weight gain, and constipation.
Read More. Seems like the big hazards are supplements and meds taken too soon before or after the Synthroid, but the Physician's Desk Reference also includes this: A high-fiber diet, soy-containing supplements, and walnuts can also interfere with the effects of levothyroxine..