Shaun's ability to fabricate a story like this to cover the fact that he can't remember his own personal story probably stems from thiamine deficiency.
Thiamine is a B-complex vitamin, essential for the functioning of the nervous system, muscles and heart. A deficiency of this vitamin is common among alcoholics and can cause polyneuropathy, heart failure and memory loss.
Therefore, it is essential that an individual seeks to develop healthy and balanced habits in relation to the consumption of alcoholic beverages and food. Always seek professional help when identifying any adverse health symptoms.
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