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Potato link to blood pressure

The humble potato is often considered to be an unhealthy food choice – for instance, potatoes don’t count towards your “five a day” of fruit and vegetables.

But now new research has found that a couple of servings a day of potatoes reduces high blood pressure without causing weight gain.

There is a catch though – the potatoes were cooked in a microwave oven without using fat or oil, and were served without any accompaniments such as ketchup, butter or mayonnaise.

In the new study, 18 obese patients with high blood pressure ate around 6 to 8 potatoes a day. The potatoes were of the purple-skinned variety and were eaten whole.

Purple potatoes were chosen because the pigment is rich in beneficial phytochemicals. The researchers then monitored the blood pressure.

Potatoes

Potatoes

The systolic blood pressure was found to drop by an average of 3.5 per cent and the dystolic by 4.3 per cent. Importantly, none of the participants in the study gained any weight after eating the potatoes.

Commenting on these results, study leader Joe Vinson said: “The potato, more than perhaps any other vegetable, has an undeserved bad reputation that has led many health-conscious people to ban them from their diet.”

“Mention ‘potato’ and people think ‘fattening, high-carbs, empty calories’. In reality, when prepared without frying and served without butter, margarine or sour cream, one potato has only 110 calories and dozens of healthful phytochemicals and vitamins. We hope our research helps to remake the potato’s popular nutritional image” he added.


He noted that other studies had identified the potato as a possible source of substances similar to ACE-inhibitor medications which are used to treat high blood pressure.

But the high temperatures associated with frying and baking potatoes may destroy most of these beneficial chemicals, hence the use of microwaves to cook them in this study.

The results of the study are published at the National Meeting & Exposition of the American Chemical Society.

Foods to eat (and avoid) to beat breast cancer

ADD THESE FOODS TO YOUR PLATE

Extra virgin olive oil

The benefits: Olive oil isn’t only loaded with risk-reducing antioxidants and phytonutrients — including squalene which inhibits tumor growth — it also has a higher monounsaturated fat content than other oils. Monounsaturated fats don’t oxidize in the body. Oxidation, a process that produces chemicals called free radicals, increases cancer risk.

Extra virgin olive oil

Extra virgin olive oil

Reap the rewards: Add at least two tablespoons of olive oil a day to your diet, perhaps even tossing vegetables in oil, which will make veggies tastier and encourage you to eat more. Use one tablespoon of extra virgin olive oil for every cup of veggies. Although it can be high in calories — about 120 calories per tablespoon– studies have found that the more extra virgin olive oil in your diet, the lower your risk.

Cruciferous vegetables

The benefits: Cruciferous veggies contain phytonutrients that stop the spread of cancer and halt cancer cells from forming. These phytonutrients also shift estrogen metabolism so your body produces a form of estrogen that doesn’t drive breast cancer.

Broccoli

Broccoli

Reap the rewards: Load your diet with broccoli, broccoli rabe, brussels sprouts, cabbage and kale. To get a bigger cancer-busting bang, cook them in oil, preferably extra virgin olive oil, which will help your body absorb more nutrients.

Dark green leafy vegetables

The benefits: Leafy veggies are loaded with folate, a B vitamin that strengthens your DNA. Low levels of folate have been linked to increased cancer risk.

Spinach

Spinach

Reap the rewards: Choose spinach and kale, as the darker the leaves, the better.

Fatty fish

The benefits: Women who consumed fish oil supplements had a 32 percent lower risk of developing breast cancer after six years compared to non-users, according to a study from the journal Cancer Epidemiology, Biomarkers & Prevention. Fatty fish contains omega-3 fatty acids, which may decrease inflammation in the body. Researchers believe chronic inflammation may encourage breast cancer development.

Oily fish

Oily fish

Reap the rewards: Although women in the above study took supplements, researchers recommend getting omega-3s directly from fish. Chomp at least two 3.5-ounce servings of fatty fish like salmon, tuna and mackerel each week.

Tomatoes

The benefits: Tomatoes are packed with lycopene, a powerful antioxidant that not only gives tomatoes their redness but also protects against breast cancer by stopping cancer cell growth.

Tomatoes

Lycopene is a powerful antioxidant

Reap the rewards: Your body absorbs lycopene best when tomatoes are cooked, concentrated or processed. Top sources include canned tomatoes, tomato sauces and tomato paste so you no longer have to feel guilty about indulging in pasta and pizza (as long as it’s veggie).


GO EASY ON THESE FOODS

Red meat

Why it’s bad: Grilling red meat creates compounds called heterocyclic amines (HCA), which drive cancers. Red meat also contains amino acids that stimulate the production of insulin and increase oxidation in the body, both of which boost cancer risk. In one study, women who ate well-done meat three times a week increased breast cancer risk by over 400 percent.

Red meat

Red meat

Tame your tastebuds: You don’t have to give up your meat-eating ways and turn vegetarian, but do limit red meat consumption, eating no more than six ounces a month.

Grapefruit

Why it’s bad: Grapefruit may elevate levels of estrogen, which is associated with increased breast cancer risk. In a study from the British Journal of Cancer, women who ate a quarter grapefruit or more a day had a 30 percent increased risk of breast cancer.

grapefruit

Grapefruit

Tame your tastebuds: If you’re a grapefruit junkie, switch to other citrus fruits until more research is done, especially if you’ve had estrogen receptor-positive breast cancer.

Vegetable oils

Why they’re bad: Vegetable oils, including soybean, safflower, sunflower and corn, are high in polyunsaturated fats, which increase cancer-promoting oxidation in the body.

Vegetable oils

Vegetable oils

Tame your tastebuds: Replace vegetable oils with extra virgin olive oil or canola oil. Unfortunately, you should also eliminate mayonnaise (unless it’s made with olive or canola oil and contains no partially hydrogenated fats), margarine and foods that contain partially hydrogenated oil (i.e. peanut butter, cookies and muffins), as all of these foods contain vegetable oils. The upshot? You now have permission to eat butter again.

Sweets

Why they’re bad: Women who reported consuming the most sweets, including desserts, sweetened beverages and added sugars, had a 27 percent greater risk of breast cancer than women who consumed less, according to the journal Cancer Causes and Control. A diet high in refined carbohydrates like those found in sweets is associated with higher levels of blood glucose, forcing the body to release insulin. That insulin encourages cancer cells to grow and could result in higher levels of estrogen, which may promote the development of breast cancer.

Sweets

Sweets

Tame your tastebuds: Keep that sweet tooth in check. Although you don’t have to go cold turkey, view sweets as an occasional treat, not a daily indulgence.

Processed meats

Why it’s bad: Researchers suspect that compounds used as preservatives in processed meat like deli meats, bacon, ham and hot dogs morph into cancer-causing compounds in the body.

Processed meats

Processed meats

Tame your tastebuds: Cut all processed meat from your diet. If you must indulge, do so only during special occasions.