Potato Intake And Incidence Of Hypertension: Results From Three Prospective US Cohort Studies

[paymanz]

Potato intake and incidence of hypertension: results from three prospective US cohort studies. - PubMed - NCBI

Abstract
OBJECTIVE:
To determine whether higher intake of baked or boiled potatoes, French fries, or potato chips is associated with incidence of hypertension.

DESIGN:
Prospective longitudinal cohort studies.

SETTING:
Healthcare providers in the United States.

PARTICIPANTS:
62  175 women in Nurses' Health Study, 88 475 women in Nurses' Health Study II, and 36 803 men in Health Professionals Follow-up Study who were non-hypertensive at baseline.

MAIN OUTCOME MEASURE:
Incident cases of hypertension (self reported diagnosis by healthcare provider).

RESULTS:
Compared with consumption of less than one serving a month, the random effects pooled hazard ratios for four or more servings a week were 1.11 (95% confidence interval 0.96 to 1.28; P for trend=0.05) for baked, boiled, or mashed potatoes, 1.17 (1.07 to 1.27; P for trend=0.001) for French fries, and 0.97 (0.87 to 1.08; P for trend=0.98) for potato chips. In substitution analyses, replacing one serving a day of baked, boiled, or mashed potatoes with one serving a day of non-starchy vegetables was associated with decreased risk of hypertension (hazard ratio 0.93, 0.89 to 0.96).

CONCLUSION:
Higher intake of baked, boiled, or mashed potatoes and French fries was independently and prospectively associated with an increased risk of developing hypertension in three large cohorts of adult men and women.


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im surprised , the reason behind it from peat point of view can be high phosphorous/calcium ratio of potatoes i think.

i always thought potatoes are very good for high BP.

 

[Westside PUFAs]

Not a good study.

"Fourthly, as with any observational study, our findings could be explained by residual confounding; for example, potatoes are often consumed with salt and added fat (such as butter or margarine). The increased sodium content could explain the association of boiled/baked potatoes with hypertension. However, our results did not materially change after we adjusted for intake of sodium or trans and saturated fat."

"Participants who consumed four or more servings a week of any type of potatoes were, in general, less physically active and smoked more than participants whose consumption was less than one serving a week."

"Participants returned a questionnaire every two years with health status updates, including information about hypertension diagnosed by a healthcare provider. Also, participants of NHS answered an extensive semiquantitative food frequency questionnaire in 1984, 1986, and then every four years thereafter; participants of NHS II and HPFS answered similar questionnaires every four years starting in 1991 (in NHS II) and 1986 (HPFS). The validity and reproducibility of these food frequency questionnaires, which ascertain intake of more than 130 foods and beverages, has been detailed previously."

 

[YuraCZ]

There is not much people who can eat just potatoes without garbage on them like Westside says. People have no willpower and are so undisciplined. Essentially 99% of studies on humans are useless. Maybe the famous starvation study in university is really good. But is so rare..

 

[Elephanto]

Potatoes are midly high in nitrate, which is a precursor of nitric oxide.

They're also high in potassium, which according to some studies increase nitric oxide.

Potassium softens vascular endothelium and increases nitric oxide release

"In the presence of aldosterone, plasma sodium in the high physiological range stiffens endothelial cells and reduces the release of nitric oxide. We now demonstrate effects of extracellular potassium on stiffness of individual cultured bovine aortic endothelial cells by using the tip of an atomic force microscope as a mechanical nanosensor. An acute increase of potassium in the physiological range swells and softens the endothelial cell and increases the release of nitric oxide."

 

[Atalanta]

There is not much people who can eat just potatoes without garbage on them like Westside says. People have no willpower and are so undisciplined. Essentially 99% of studies on humans are useless. Maybe the famous starvation study in university is really good. But is so rare..

I agree. .

Blame the potatoes but not the huge fatty piece of meat, butter, cheese, sour cream (excess fat and protein) that is eaten with the potato.

 

[Atalanta]

Not a good study.

"Fourthly, as with any observational study, our findings could be explained by residual confounding; for example, potatoes are often consumed with salt and added fat (such as butter or margarine). The increased sodium content could explain the association of boiled/baked potatoes with hypertension. However, our results did not materially change after we adjusted for intake of sodium or trans and saturated fat."

"Participants who consumed four or more servings a week of any type of potatoes were, in general, less physically active and smoked more than participants whose consumption was less than one serving a week."

"Participants returned a questionnaire every two years with health status updates, including information about hypertension diagnosed by a healthcare provider. Also, participants of NHS answered an extensive semiquantitative food frequency questionnaire in 1984, 1986, and then every four years thereafter; participants of NHS II and HPFS answered similar questionnaires every four years starting in 1991 (in NHS II) and 1986 (HPFS). The validity and reproducibility of these food frequency questionnaires, which ascertain intake of more than 130 foods and beverages, has been detailed previously."

I don't understand why "scientists" waste time with these observational studies.

Let's put people in a ward and feed them plain potatoes for a few weeks and then measure their blood pressure. I really believe the meat and dairy industries are the ones funding these types of studies. Many people are realizing the benefits of a plant based diet and potatoes are an inexpensive source of glucose and micro-nutrients.

 

[YuraCZ]

I agree. .

Blame the potatoes but not the huge fatty piece of meat, butter, cheese, sour cream (excess fat and protein) that is eaten with the potato.

People eats much worse processed garbage. Like some dressings packed with vegetable oils, chemicals... I think not many people eat real butter. Maybe margarine. Cheese is also very bad quality in most cases..

 

[Such_Saturation]

replacing one serving a day of baked, boiled, or mashed potatoes with one serving a day of non-starchy vegetables was associated with decreased risk of hypertension (hazard ratio 0.93, 0.89 to 0.96).

 

[Westside PUFAs]

I don't understand why "scientists" waste time with these observational studies.

Because those specific scientists or researchers don't have the "hippie" view of food. They don't think food is that important. They think "person ate this for this many years so this must mean this" but they don't understand how important it is to control the food and they actually take the persons word for what they purport to have eaten. That is not proper science. But there are researchers who do believe in being objective. Here's one for just 21 days, blood pressure lowered:

The Hawaii Diet: ad libitum high carbohydrate, low fat multi-cultural diet for the reduction of chronic disease risk factors: obesity, hypertension... - PubMed - NCBI

 

[Atalanta]

Because those specific scientists or researchers don't have the "hippie" view of food. They don't think food is that important. They think "person ate this for this many years so this must mean this" but they don't understand how important it is to control the food and they actually take the persons word for what they purport to have eaten. That is not proper science. But there are researchers who do believe in being objective. Here's one for just 21 days, blood pressure lowered:

The Hawaii Diet: ad libitum high carbohydrate, low fat multi-cultural diet for the reduction of chronic disease risk factors: obesity, hypertension... - PubMed - NCBI

Thanks Westside.
That study is pretty consistent with the results Dr McDougall has had treating people with a high carb diet.

Most people can't remember what they ate the day before let alone what they ate in the past two years. Bad science that will keep people fearing carbs and especially starches like potatoes.

 

[Atalanta]

People eats much worse processed garbage. Like some dressings packed with vegetable oils, chemicals... I think not many people eat real butter. Maybe margarine. Cheese is also very bad quality in most cases..

That was just an incomplete list of the types of food that often accompany potatoes, at least in American cuisine.
Even "quality" meat and cheese can be eaten in excess. Many people eat excess fat and protein but blame the carbs.

 

[YuraCZ]

That was just an incomplete list of the types of food that often accompany potatoes, at least in American cuisine.
Even "quality" meat and cheese can be eaten in excess. Many people eat excess fat and protein but blame the carbs.

of course. But you can eat carbs in excess as well.. right?

 

[paymanz]

maybe high carb low protein and very low fat diets like rice diet have many benefits by improving insulin sensitivity and glucose metabolism,in short term.but in long run protein shortage can have bad effects.