Reading that he probably takes a Statin, you say cholesterol reducer ... there is so much info on the danger of statin drugs....And we need cholesterol and perhaps his levels have gotten too low with the drug. I've been a supporter of Weston Price for years and here is a history of cholesterol and statins. Low levels of can also lead to dementia, our brains need cholesterol.

Dangers of Statin Drugs: What You Haven’t Been Told About Popular Cholesterol-Lowering Medicines - The Weston A. Price Foundation