Vitamin D as found in Cod Liver Oil or concentrated D supplement. Make sure you split this dose into two or more times per day. 700-1,000mg. watch for 'bowel' reactions and lower your dose if they occur. Doses higher than 60 mg. Do not exceed the maximum.
All minerals can be toxic in dose that are too high.
Copper and zinc balance one another. 120 mg. containing 4.8 mg of lithium. Trace amounts of lithium restore cellular response to thyroxine. Men may not need this. An amino acid for heart and nerves.