Combater tensão alta...

https://www.express.co.uk/life-style/health/987094/high-blood-pressure-lower-reading-potassium-rich-foods

Citando:
"But high blood pressure can often be prevented or reduced by eating more potassium.

Potassium helps to balance out the negative effects of salt and lower your blood pressure, according to Blood Pressure UK.

It advises: “To reap the benefits of more potassium in your life, try to eat at least five portions of fruit and vegetables every day. (A portion is about the same size as your closed fist.)

“Not only will this help to lower your blood pressure, it will also help you to avoid certain cancers, bowel problems and even heart attacks or strokes.”"
(...)
"Good sources of potassium include potatoes, sweet potatoes, bananas, tomato sauce (without added salt or sugar), orange juice, tuna (fresh, frozen or tinned, but avoid tuna packed in brine), yoghurt and fat-free milk.

But it warns: “If you have kidney disease, or are taking certain blood pressure medication, a large increase in potassium cold be harmful.

“In this case, avoid taking potassium supplements and check with your doctor before drastically increasing your potassium intake.”"

Sal e hipertensão nem por isso?

Estudo questiona que sal provoca tensão alta:
http://www.dailymail.co.uk/health/article-4443612/Low-salt-diets-not-lower-blood-pressure.html

Citando:
"Researchers followed more than 2,600 men and women over a period of 16 years
They discovered that consuming less salt wasn't linked to lower blood pressure
New findings call into question salt limits recommended by dietary guidelines

Cutting salt from your diet may not be the answer to lower blood pressure, a study has found.

The NHS advice is for adults to eat no more than six grams of salt a day – the equivalent of 2.4 grams of sodium.

But a study by Boston University found people consuming less salt than this actually had higher blood pressure, prompting a call for the guidance to be changed.

Researchers say the advice to eat less salt is too simple and ignores the fact that salt can raise hormone levels in the body which regulate and keep blood pressure low.
(...)
While many people with heart disease who cut salty, processed food out of their diet do see their blood pressure fall, these tend to be 'salt-sensitive' people, which may be why they have bad hearts to begin with.

Salt can cut blood pressure in some people, but the experts say potassium, found in bananas and potatoes, can help tip the balance too, along with magnesium and calcium. 

Levels of these could explain why some people who consumed more than six grams of salt had lower blood pressure."

Alimentos com alto teor de potássio

(a evitar por quem tem doença renal, quem faz hemodiálise):
https://www.portaldadialise.com/articles/frutas-e-legumes-que-sao-aceitaveis-para-doentes-com-doenca-renal-cronica

Citando:
"Frutas e legumes que contem níveis de potássio elevado incluem: alcachofra, batata, bróculos, curgete, couve-portuguesa, tomate, couve, alho-francês, espinafres, beterraba, couve-lombarda, couve de bruxelas, damascos, abacaxi, melão, tâmaras, bananas, laranjas, ameixas, passas, melancia, batata-doce e espinafre."

Potássio ajuda a controlar a tensão arterial

http://www.dailymail.co.uk/health/article-4386998/How-reverse-high-blood-pressure.html

Citando:
"High blood pressure is most often caused by increased levels of dietary sodium
Known as hypertension, it is believed to affect 1 billion people around the world
But scientists have found potassium balances out the effects of salt in the body
Experts claim that the mineral works in the same way as commonly used drugs"
(...)
"HOW MUCH SHOULD YOU EAT?

A 2004 Institute of Medicine report recommends that adults consume at least 4.7 grams of potassium per day to lower blood pressure. This amount would also blunt the effects of dietary sodium and reduce the risks of kidney stones and bone loss. For example, eating three quarters of a cup of black beans will help you achieve almost 50 per cent of your daily potassium goal.

While to achieve the full amount, you would have to consume 11 bananas. "