Vegetable oil ingestion not so sunny after all

Adapted from BMJ 9 Feb 13 Use of dietary linoleic acid for secondary prevention  of coronary heart disease and death: evaluation of recovered data from the Sydney Diet Heart Study and updated meta-analysis. Christopher E Ramsden et al

Despite lack of evidence to the contrary I still see NHS dieticians telling patients to avoid naturally occurring saturated fat such as butter, cream and the fat in animal meats. This study didn’t get much publicity at the time so here it is again.

The question was, does increasing dietary omega 6 linoleic acid in the place of saturated fat reduce the risk of death from coronary heart disease?

What happened was that in the Sydney Diet Heart Study, a RCT done between 1966 and 1973, saturated fat (thought to produce heart attacks) was replaced by omega 6 fatty acids from Safflower oil ( vegetable oil and margarines, thought to be heart healthy). Although the blood cholesterol levels decreased in the intervention group, deaths from all causes, coronary heart disease and cardiovascular disease, all increased.

The subjects were all men aged 30-59 who had had a recent heart attack.  As an example, all cause mortality was 17.2% in the intervention group compared to 11.8% in the control group. Results for cardiovascular disease were similar.

It is mystifying that dietary advice telling people to swap lard for vegetable oils and butter for margarine is still going on. Very telling is that date that this study was done. The results would have been out by 1975.

Obesity makes asthma particularly difficult to control

From British Thoracic Society Winter Scientific Meeting December 2017 London

Researchers have demonstrated that diet induced obesity leads to the development of airways hyper-reactivity through the interplay of an immunological and metabolic pathway.

Resultant asthma can affect children as well as adults. Unfortunately obesity associated asthma responds poorly to standard asthma medications including steroids and can result in more hospitalisation and a reduced quality of life.

The most effective obesity treatment is probably bariatric surgery to achieve sustained weight loss. In contrast dietary management and drugs are far less effective.

Polycystic ovary syndrome is linked to autism in offspring

Cambridge University Autism Research Centre has found that compared to women who do not have polycystic ovary syndrome, women who do have this have about double the risk of having a child with autism.  The risk was slightly higher in male children compared to female children.

Cherskov A et al. Polycystic ovary syndrome and autism: At test of the prenatal sex steroid theory. Transl Psychiatry. Aug 1 2018. doi:10.1038/s41398-018-01867.

The UK and US are the only western countries where life expectancy is falling

Researchers looked at 17 high income countries to evaluate trends in national mortality.

In the UK there has been a drop of a few months in life expectancy for both men and women over the age of 65. Degenerative diseases were the main cause such as respiratory disease, circulatory disease, Alzheimer’s disease, nervous system disease and mental disorders.

In the USA drug overdoses were responsible for the decline in life expectancy.

The study looked at mortality between 2014 and 2015. A sixty five year old in the UK at that time would have been born in 1950, after the start of the NHS.

We will need to wait to see if this trend will reverse or not.

British Medical Journal. UK life expectancy drops while other western countries improve. National Health Services. 2018 August 16.

Younger age at diagnosis predicts earlier death in type one diabetes (on standard treatment)

Researchers in Sweden have found that the earlier children are diagnosed with type one diabetes, the less their life expectancy is. Matters are worse for women than men. They think that adults diagnosed in childhood need increased input to deal with cardiovascular risk factors as they get older. Currently age of onset is ignored when it comes to stratifying risk.

Those diagnosed under the age of 10 had 4 times the hazard ratio for all cause mortality, over 7 times the risk of cardiovascular disease, 4 times the risk for non cardiovascular mortality,  over 11 times the risk of cardiovascular disease, 31 times the risk of having a myocardial infarction, over 6 times the risk for stroke, 13 times the risk of heart failure, but almost the same risk as controls for atrial fibrillation.

There is a better outlook for those diagnosed in their late twenties. The risk was almost 3 times the background rate for total mortality and the most prominent risk was again for cardiovascular mortality coming in at 6 times the background rate.

What this means is that if you are a girl diagnosed with type one under the age of ten, you may expect to live almost 18 years fewer than your classmates and if you are a boy, 14 years fewer.

My comment: More effort could also be given to youngsters on diagnosis achieving normal blood sugars by advising parents about the easiest ways to control blood sugars such as the adoption of a low carb diet and advanced insulin techniques. Although these statistics are shocking to see, it doesn’t have to be like this at all. Many diabetics have changed their life expectancy around and reverse some complications by adopting practices that improve glycaemic control and metabolic factors such as we describe on this site.

Rawshani A et al. Excess mortality and cardiovascular disease in young adults with type 1 diabetes in relation to age at onset: a nationwide, register-based cohort study. Lancet 2018;392:477-86;doi:10.1016/S0140-6736(18)31506-X

 

Public Health Collaboration Conference 2018: Achieving your optimal blood sugar target

Videos of the lectures given at the Public Health Collaboration conference 2018 which was held in May over the royal wedding weekend have now been released on You Tube.

You can see my talk, Achieving your optimal blood sugar target, as well as others, on the link below. There are a wide variety of lifestyle topics discussed. Happy viewing.

 

https://www.youtube.com/results?search_query=public+health+collaboration+conference+2018

Exercise games can aid weight loss in overweight children

USA researchers have proven that video games such as Kinect Sports and Just Dance can help overweight children lose weight and improve their cardiovascular risk factors.

Adherence to the programme of one hour three times a week was very high with 94.4 % sticking to the games. 46 families were involved with 23 families in the intervention and control groups.

BMI , blood pressure, total cholesterol and LDL cholesterol all improved in the intervention group.

The study was funded by the AHA.