What is the secret to reaching age 100?  It is 1 glass of IRN-BRU every day.  For as long as she can remember, Scottish grandmother Jane Graham has had 1 glass of IRN BRU daily.

On her birthday, she celebrated with some gin in her IRN-BRU. As a present, Barrs, the makers of IRN-BRU, gave her a crate of the beverage.

Read more about her day at the Daily Record (UK).

Secret to reaching age 100.