Alexandra100
Well-Known Member
I have copied the following extracts from this new study published in Medscape, because it seems to me very important for most members of this Forum, and because I know some members don't want to sign up to the likes of Medscape themselves even though it is free and above suspicion. However, I strongly recommend subscribing to Medscape to anyone who wants to read the whole text of this research paper and be alerted to cutting edge research in the future.
Evidence From Prospective Cohort Studies DoesNot Support Current Dietary Fat Guidelines
A Systematic Review and Meta-Analysis
Zoë Harcombe; Julien S Baker; Bruce Davies
DISCLOSURES Br J Sports Med. 2017;51(24):1743-1749.
ABSTRACT
Objectives
National dietary guidelines were introduced in 1977 and 1983, by the US and UK governments to reduce coronary heart disease (CHD) mortality by reducing dietary fat intake. Our 2016 systematic review examined the epidemiological evidence available to the dietary committees at the time; we found no support for the recommendations to restrict dietary fat. The present investigation extends our work by re-examining the totality of epidemiological evidence currently available relating to dietary fat guidelines.
Methods
A systematic review and meta-analysis of prospective cohort studies currently available, which examined the relationship between dietary fat, serum cholesterol and the development of CHD, were undertaken.
Conclusions
Epidemiological evidence to date found no significant difference in CHD mortality and total fat or saturated fat intake and thus does not support the present dietary fat guidelines. The evidence per se lacks generalisability for population-wide guidelines.
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Introduction
US public health dietary advice was announced by the Select Committee on Nutrition and Human needs in 1977[1] and was followed by UK public health dietary advice issued by the National Advisory Committee on Nutritional Education in 1983.[2] Dietary recommendations in both cases focused on reducing dietary fat intake; specifically to (1) reduce overall fat consumption to 30% of total energy intake and (2) reduce saturated fat consumption to 10% of total energy intake.
The recommendations were intended to address mortality from coronary heart disease (CHD). In 2015, we published a systematic review and meta-analysis,[3] which reported that evidence from randomised controlled trials (RCTs), available to the dietary guideline committees, did not support the introduced dietary fat recommendations. In 2016, we published a systematic review and meta-analysis,[4] which reported that RCT evidence currently available does not support the introduced dietary guidelines. In 2016, we published a systematic review,[5] which reported that epidemiological evidence, available to the dietary guideline committees, did not support the introduced dietary fat recommendations. The aim of these systematic reviews has been twofold: to examine the epidemiological and RCT evidence base for the dietary fat guidelines to assess if they were justified at the time of their introduction and to review if the evidence currently available supports the extant recommendations. This systematic review and meta-analysis completes this work by examining the totality of epidemiological evidence currently available.
****************************************************************************************
The conclusion of the four systematic reviews and three meta-analyses is that there was no evidence to support the dietary fat guidelines being introduced and there is no evidence currently available to support them. Public health authorities need to urgently review dietary advice.
Evidence From Prospective Cohort Studies DoesNot Support Current Dietary Fat Guidelines
A Systematic Review and Meta-Analysis
Zoë Harcombe; Julien S Baker; Bruce Davies
DISCLOSURES Br J Sports Med. 2017;51(24):1743-1749.
ABSTRACT
Objectives
National dietary guidelines were introduced in 1977 and 1983, by the US and UK governments to reduce coronary heart disease (CHD) mortality by reducing dietary fat intake. Our 2016 systematic review examined the epidemiological evidence available to the dietary committees at the time; we found no support for the recommendations to restrict dietary fat. The present investigation extends our work by re-examining the totality of epidemiological evidence currently available relating to dietary fat guidelines.
Methods
A systematic review and meta-analysis of prospective cohort studies currently available, which examined the relationship between dietary fat, serum cholesterol and the development of CHD, were undertaken.
Conclusions
Epidemiological evidence to date found no significant difference in CHD mortality and total fat or saturated fat intake and thus does not support the present dietary fat guidelines. The evidence per se lacks generalisability for population-wide guidelines.
****************************************************************************************
Introduction
US public health dietary advice was announced by the Select Committee on Nutrition and Human needs in 1977[1] and was followed by UK public health dietary advice issued by the National Advisory Committee on Nutritional Education in 1983.[2] Dietary recommendations in both cases focused on reducing dietary fat intake; specifically to (1) reduce overall fat consumption to 30% of total energy intake and (2) reduce saturated fat consumption to 10% of total energy intake.
The recommendations were intended to address mortality from coronary heart disease (CHD). In 2015, we published a systematic review and meta-analysis,[3] which reported that evidence from randomised controlled trials (RCTs), available to the dietary guideline committees, did not support the introduced dietary fat recommendations. In 2016, we published a systematic review and meta-analysis,[4] which reported that RCT evidence currently available does not support the introduced dietary guidelines. In 2016, we published a systematic review,[5] which reported that epidemiological evidence, available to the dietary guideline committees, did not support the introduced dietary fat recommendations. The aim of these systematic reviews has been twofold: to examine the epidemiological and RCT evidence base for the dietary fat guidelines to assess if they were justified at the time of their introduction and to review if the evidence currently available supports the extant recommendations. This systematic review and meta-analysis completes this work by examining the totality of epidemiological evidence currently available.
****************************************************************************************
The conclusion of the four systematic reviews and three meta-analyses is that there was no evidence to support the dietary fat guidelines being introduced and there is no evidence currently available to support them. Public health authorities need to urgently review dietary advice.