[1] It was made after the UK lowered the recommended amount of alcohol for men to match women's at about the equivalent of seven imperial pints (4 L) of beer per week.
The purpose of the documentary was to inform people about the realities of alcohol and its effects on the body as well as answer questions about why some people are more sensitive to alcohol, hangover remedies, the benefits of red wine, drinking on an empty stomach, effects of nightcaps on sleep, and other common questions.
The documentary states that nightcaps help people fall asleep faster and result in deeper sleep the first half of the night, but can lead to more interrupted sleep for the second half of the night.
One of the main reasons for the change in the recommended limit is how much cancer is related to alcohol consumption.
Sam Wollaston writes in The Guardian that the documentary is "insubstantial but addictive" and adds no new knowledge about alcohol.