A GP has revealed what people's urine colour says about their health.
According to London-based Dr Luke Powles from Bupa Health Clinics, urine colour indicates people's hydration levels, with dark yellow colours suggesting the need for an instant glass of water.
Reds and even green shades may be a sign of a more serious health problem, he adds.
Dr Powles stresses most people require between 1.5 and two litres of water a day, and should avoid dehydrating, sugary drinks like soda and alcohol.
Below, Dr Powles outlines what different urine colours say about people's wellbeing.
This is the ideal urine colour and demonstrates a person is sufficiently hydrated, Cosmopolitan reported.
A lighter colour than this indicates the individual is probably drinking more water than they need to.
Although usually harmless, this may cause them to urinate overly frequently.
Amber-coloured urine suggests somebody is dehyrated and should drink water as soon as possible.
Although it may be alarming, green urine is usually harmless and occurs as a result of eating particular foods, such as asaparagus or artifical colourings.
In rare cases, however, green urine is a sign of the rare genetic disease familial hypercalcemia, which causes abnormally high calcium levels in the blood.
Green urine can also occur as a side effect of certain medications.
Red urine is also usually due to eating certain foods, such as beetroot.
Yet, it can also be due to blood, such as during menstruation or, in more serious cases, infections or even cancers.
If people are unable to link their red urine to a food they have eaten recently, they should visit their GP as soon as possible.