Joan Collins is worried about "creaky joints".
The 80-year-old actress takes Vitamin C tablets and other supplements regularly to make sure she avoids hip and knee problems that are associated with old age.
She explained: "I swear by Redoxon, a fizzy vitamin C tablet, which I have every day.
"I have friends who have suffered badly with their hips and their knees - Liza Minnelli, for instance, whom I have known for years and years - so I take liquid MSM [natural sulphur supplement] and, touch wood, I don't have creaky joints."
Joan is also keen to maintain her figure but doesn't like working out and has had less time to spare for fitness.
She added: "I am lucky that I am very fit. I try to excercise three times a week, although lately I have been far too busy. And I don't enjoy it at all. I hate it, in fact."
The 'Dynasty' actress intends to live life to the fullest and after reaching the milestone of 50, began thinking about how much time she had left.
She told Britain's HELLO! magazine: "You have to eat life or life will eat you. I think you only realise how short life is when you get past 50.
"Then you think, 'How much time do I have left?' I'm going to take advantage of life and do everything I want to do."