Re: can a low thyroid function slow down the digestion of alcohol?
I don't know about how a thyroid affects alcohol, but thyroid issues do lead to digestive issues in regards to food. This is why so many have malabsorption of nutrients and are deficient in key vitamins and minerals. Most commonly ferritin and vitamin D.
This is why doctors ought to be looking at targets for their patients rather than simply being happy with "ranges". Getting thyroid hormones where they should be would help the entire metabolic rate and help correct all the things which have slowed or broken down eg; hair shedding, weight gain, hormone imbalance, digestive disorders, allergies, PMS, liver detox, body temperature, bowel function, energy levels, libido etc etc.
Sorry, can't help with the alcohol related question, but might be best to stick to one or two standard drinks over a period of an evening if you are driving, rather than risking losing your licence if caught for being over the limit.