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Dr. Karl says coffee is GOOD for you and it increases your life expectancy

Dr. Karl Kruszelnicki (photo)

Dr. Karl Kruszelnicki (photo)

An Australian doctor says that three to four cups of coffee a day can increase an adult’s life expectancy and reduce the risk of cancer and heart disease.

Dr. Karl Kruszelnicki, a medical and biomedical engineering graduate, spoke in an episode of his podcast Science with Dr. Karl about the many health benefits of caffeine.

“Coffee is actually so great for you,” said the leading scientific commentator.

“It increases your life expectancy by reducing your chances of heart and liver disease or prostate cancer if you are a man, and has a positive effect on people with type two diabetes.”

Chlorogenic acid in coffee improves glucose metabolism – which boosts your energy levels – and the immunostimulants (which boost the immune system) and anti-inflammatory properties keep your body in good shape, he said.

However, some people are ‘extremely sensitive’ by design, including unborn children and teenagers, the latter of whom may develop ‘nonspecific anxiety’ from drinking too much.

This means they are hectic in their daily lives, but cannot figure out why, and it is a “killer” according to Dr. Karl.

An Australian doctor says three or four cups of coffee a day can increase an adult's life expectancy and reduce cancer and heart disease risk

An Australian doctor says three or four cups of coffee a day can increase an adult's life expectancy and reduce cancer and heart disease risk

An Australian doctor says three or four cups of coffee a day can increase an adult’s life expectancy and reduce cancer and heart disease risk

Examination of the University of South Australia found that the average person will develop high blood pressure – a precursor to heart disease – if they exceed six cups of coffee a day, so it pays to know your limit.

Brisbane dietitian Aidan Muir said that while he is a ‘big fan’ of using caffeine to give you energy and boost your performance, keep in mind that you shouldn’t take it too late in the day or too often or it can ‘mess with your sleep and create a vicious circle.’

Post it up Instagram pageAidan revealed the average lifespan of a cup of caffeine and the ‘half-life’ that could mean you’re struggling with insomnia later in the day.

A dietitian previously revealed how long it really takes to metabolize a cup of coffee and how it can live in your system for much longer than you think (photo)

A dietitian previously revealed how long it really takes to metabolize a cup of coffee and how it can live in your system for much longer than you think (photo)

A dietitian previously revealed how long it really takes to metabolize a cup of coffee and how it can live in your system for much longer than you think (photo)

According to the dietitian (photo), the most important thing to remember is that most of the caffeine you drink is 'absorbed within 45 minutes', but there is a 'half-life' that lasts longer

According to the dietitian (photo), the most important thing to remember is that most of the caffeine you drink is 'absorbed within 45 minutes', but there is a 'half-life' that lasts longer

According to the dietitian (photo), the most important thing to remember is that most of the caffeine you drink is ‘absorbed within 45 minutes’, but there is a ‘half-life’ that lasts longer

According to the dietitian, the most important thing to remember is that most of the caffeine you drink is ‘absorbed within 45 minutes’.

How much caffeine is in coffee and tea?

* 8-ounce cup of coffee: 95–165 mg

* 1-ounce espresso: 47-64 mg

* 8-ounce cup of decaffeinated coffee: 2-5 mg

* 8-ounce cup of black tea: 25-48 mg

* 8-ounce cup of green tea: 25-29 mg

Source: Health line

“The effect peaks around the hour, but the average time it takes to metabolize half the caffeine is five hours for most people,” Aidan said.

“An average person will get through the next half in another five hours (his” half-life “) and so on.”

The expert said this ‘half-life’ varies from person to person and can range from an hour and a half to nine and a half hours, depending on a number of factors.

“This range is due to differences in your type of CYP1A2 gene, along with everything from smoking to pregnancy, weight, height, and even oral contraceptives,” Aidan said.

Therefore, although you will feel the effects of a cup of coffee almost immediately, it remains in your system long after the one-hour mark.

Speaking of when it's best to drink your coffee, Aidan said for the majority, it's best to take your 'last caffeine dose before 2pm' (stock image)

Speaking of when it's best to drink your coffee, Aidan said for the majority, it's best to have your 'last caffeine dose before 2pm' (stock image)

Speaking of when it’s best to drink your coffee, Aidan said for the majority, it’s best to take your ‘last caffeine dose before 2pm’ (stock image)

What are the disadvantages of drinking coffee?

* Can increase cholesterol levels

* Risk factor associated with osteoporosis in women

* Slightly addictive and can cause irritability and stress

* Can cause insomnia and sleep deprivation

What are the benefits of drinking coffee?

* Stimulates adrenaline which makes you more alert

* Contains antioxidants that repair body damage

* Can stimulate the production of antidepressant chemicals in the brain

* There is some evidence that it lowers the risk of heart disease

Speaking of when it’s best to drink your coffee, Aidan said for the majority, all you need to do is get your ‘last caffeine dose before 2 p.m.’.

“This means that most of the caffeine is metabolized by going to bed and you shouldn’t have any sleep problems,” he said.

However, if you drink coffee at 3:00 PM – as he showed in his post on Instagram – the coffee may remain in your system well into the night, which can damage your REM and deeply restorative sleep.

How long does coffee really last in your system?

Caffeine is a fast-acting stimulant that acts on your central nervous system. It can increase your blood pressure and heart rate, boost your energy and improve your overall mood.

* You can experience the effects of caffeine immediately after consuming, and the effects will last as long as the caffeine remains in your body.

* According to the American Academy of Sleep Medicine, the half-life of caffeine is up to 5 hours. Half-life is the amount of time it takes to reduce an amount of a substance to half its original amount. So if you’ve consumed 10 milligrams of caffeine, you still have 5 mg in your body after five hours.

* The effects of caffeine reach peak levels within 30 to 60 minutes of consumption. This is when you are likely to experience the ‘nervous’ effects of caffeine. You may also urinate more because of the fluid volume ingested and the mild diuretic effect of caffeine

* The other half of the caffeine you consume can last much longer than five hours.

* Due to the long-term effects of caffeine, it is recommended that you do not consume it at least six hours before bed. So if you go to bed at 10pm, you should have your last round of caffeine by 4pm at the latest.

Source: Health line

“Like most things, this is individual,” Aidan said.

“Pay attention to how you feel, and your top priority should be to get a good night’s sleep, so you don’t want caffeine to affect that.”

He added, “But if you can fit it in so that it supports your performance without any noticeable drawbacks, it’s definitely worth taking advantage of.”

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