Restricting sugar consumption in utero and in early childhood significantly reduces risk of midlife chronic disease, study finds

A low-sugar diet in utero and in the first two years of life can meaningfully reduce the risk of chronic diseases in adulthood, a new study has found, providing compelling new evidence of the lifelong health effects of early-life sugar consumption.

Published in Science, the study finds that children who experienced sugar restrictions during their first 1,000 days after conception had up to 35% lower risk of developing Type 2 diabetes and as much as 20% less risk of hypertension as adults. Low sugar intake by the mother prior to birth was enough to lower risks, but continued sugar restriction after birth increased the benefits.

Taking advantage of an unintended "natural experiment" from World War II, researchers at the USC Dornsife College of Letters, Arts and Sciences, McGill University in Montreal, and the University of California, Berkeley, examined how sugar rationing during the war influenced long-term health outcomes.

The United Kingdom introduced limits on sugar distribution in 1942 as part of its wartime food rationing program. Rationing ended in September 1953.

The researchers used contemporary data from the U.K. Biobank, a database of medical histories and genetic, lifestyle and other disease risk factors, to study the effect of those early-life sugar restrictions on health outcomes of adults conceived in the U.K. just before and after the end of wartime sugar rationing.

"Studying the long-term effects of added sugar on health is challenging," says study corresponding author Tadeja Gracner, senior economist at the USC Dornsife Center for Economic and Social Research. "It is hard to find situations where people are randomly exposed to different nutritional environments early in life and follow them for 50 to 60 years. The end of rationing provided us with a novel natural experiment to overcome these problems."

Sugar intake during rationing was about 8 teaspoons (40 grams) per day on average. When rationing ended, sugar and sweets consumption skyrocketed to about 16 teaspoons (80 grams) per day.

Notably, rationing did not involve extreme food deprivation overall. Diets generally appeared to have been, in fact, within today's guidelines set by the U.S. Department of Agriculture and the World Health Organization, which recommend no added sugars for children under two and not more than 12 teaspoons (50g) of added sugar daily for adults.

The immediate and large increase in sugar consumption but no other foods after rationing ended created an interesting natural experiment: Individuals were exposed to varying levels of sugar intake early in life, depending on whether they were conceived or born before or after September 1953. Those conceived or born just before the end of rationing experienced sugar-scarce conditions compared to those born just after who were born into a more sugar-rich environment.

The researchers then identified those born around this time in the U.K. Biobank data collected over 50 years later. Using a very tight birth window around the end of sugar rationing allowed the authors to compare midlife health outcomes of otherwise similar birth cohorts.

While living through the period of sugar restriction during the first 1,000 days of life substantially lowered the risk of developing diabetes and hypertension, for those who were later diagnosed with either of those conditions, onset of disease was delayed by four years and two years, respectively.

Notably, exposure to sugar restrictions in utero alone was enough to lower risks, but disease protection increased postnatally once solids were likely introduced.

The magnitude of this effect is meaningful as it can save costs, extend life expectancy and, perhaps more importantly, quality of life, say the researchers.

In the United States, people with diabetes incur annual medical expenditures of about $12,000 on average. Further, earlier diagnosis of diabetes means significantly shorter life expectancy, with every decade earlier that a diagnosis of diabetes is made cutting three to four years off of life expectancy.

These numbers underscore the value of early interventions that could delay or prevent this disease, the researchers note.

Experts' concerns about children's long-term health as they consume excessive amounts of added sugars during their early life, a critical period of development, continue to mount. Adjusting child sugar consumption, however, is not easy -- added sugar is everywhere, even in baby and toddler foods, and children are bombarded with TV ads for sugary snacks, say the researchers.

"Parents need information about what works, and this study provides some of the first causal evidence that reducing added sugar early in life is a powerful step towards improving children's health over their lifetimes," says study co-author Claire Boone of McGill University and the University of Chicago.

Co-author Paul Gertler of UC Berkeley and the National Bureau of Economics Research adds: "Sugar early in life is the new tobacco, and we should treat it as such by holding food companies accountable to reformulate baby foods with healthier options and regulate the marketing and tax sugary foods targeted at kids."

This study is the first of a larger research effort exploring how early-life sugar restrictions affected a broader set of economic and health outcomes in later adulthood, including education, wealth, and chronic inflammation, cognitive function and dementia.

Journal Reference:

1. Tadeja Gracner, Claire Boone, Paul J. Gertler. Exposure to sugar rationing in the first 1000 days of life protected against chronic disease. Science, 2024; DOI: 10.1126/science.adn5421 

Courtesy:

University of Southern California. "Restricting sugar consumption in utero and in early childhood significantly reduces risk of midlife chronic disease, study finds." ScienceDaily. ScienceDaily, 31 October 2024. <www.sciencedaily.com/releases/2024/10/241031185320.htm>.

 

 

 

 

 

Five minutes of extra exercise a day could lower blood pressure

New research suggests that adding a small amount of physical activity -- such as uphill walking or stair-climbing -- into your day may help to lower blood pressure.

The study, published in Circulation, was carried out by experts from the ProPASS (Prospective Physical Activity, Sitting and Sleep) Consortium, an international academic collaboration led by the University of Sydney and University College London (UCL).

Just five minutes of activity a day was estimated to potentially reduce blood pressure, while replacing sedentary behaviours with 20-27 minutes of exercise per day, including uphill walking, stair-climbing, running and cycling, was also estimated to lead to a clinically meaningful reduction in blood pressure.

Joint senior author Professor Emmanuel Stamatakis, Director of the ProPASS Consortium from the Charles Perkins Centre said: "High blood pressure is one of the biggest health issues globally, but unlike some major causes of cardiovascular mortality there may be relatively accessible ways to tackle the problem in addition to medication."

"The finding that doing as little as five extra minutes of exercise per day could be associated with measurably lower blood pressure readings emphasises how powerful short bouts of higher intensity movement could be for blood pressure management."

Hypertension, or a consistent elevated blood pressure level, is one of the biggest causes of premature death globally. Affecting 1.28 billion adults around the world, it can lead to stroke, heart attack, heart failure, kidney damage and many other health problems, and is often described as the 'silent killer' due to its lack of symptoms.

The research team analysed health data from 14,761 volunteers in five countries to see how replacing one type of movement behaviour with another across the day is associated with blood pressure.

Each participant used a wearable accelerometer device on their thigh to measure their activity and blood pressure throughout the day and night.

Daily activity was split into six categories: sleep, sedentary behaviour (such as sitting), slow walking, fast walking, standing, and more vigorous exercise such as running, cycling or stair climbing.

The team modelled statistically what would happen if an individual changed various amounts of one behaviour for another in order to estimate the effect on blood pressure for each scenario and found that replacing sedentary behaviour with 20-27 minutes of exercise per day could potentially reduce cardiovascular disease by up to 28 percent at a population level.

First author Dr Jo Blodgett from the Division of Surgery and Interventional Science at UCL and the Institute of Sport, Exercise and Health said: "Our findings suggest that, for most people, exercise is key to reducing blood pressure, rather than less strenuous forms of movement such as walking.

"The good news is that whatever your physical ability, it doesn't take long to have a positive effect on blood pressure. What's unique about our exercise variable is that it includes all exercise-like activities, from running for a bus or a short cycling errand, many of which can be integrated into daily routines.

"For those who don't do a lot of exercise, walking did still have some positive benefits for blood pressure. But if you want to change your blood pressure, putting more demand on the cardiovascular system through exercise will have the greatest effect."

Professor Mark Hamer, joint senior author of the study and ProPASS Deputy Director from UCL, said: "Our findings show how powerful research platforms like the ProPASS consortium are for identifying relatively subtle patterns of exercise, sleep, and sedentary behaviour, that have significant clinical and public health importance."

 

Journal Reference:

1. Joanna M. Blodgett, Matthew N. Ahmadi, Andrew J. Atkin, Richard M. Pulsford, Vegar Rangul, Sebastien Chastin, Hsiu-Wen Chan, Kristin Suorsa, Esmée A. Bakker, Nidhi Gupta, Pasan Hettiarachchi, Peter J. Johansson, Lauren B. Sherar, Borja del Pozo Cruz, Nicholas Koemel, Gita D. Mishra, Thijs M.H. Eijsvogels, Sari Stenholm, Alun D. Hughes, Armando Teixeira-Pinto, Ulf Ekelund, I-Min Lee, Andreas Holtermann, Annemarie Koster, Emmanuel Stamatakis, Mark Hamer, Hans Savelberg, Bastiaan de Galan, Carla van de Kallen, Dick H.J. Thijssen. Device-Measured 24-Hour Movement Behaviors and Blood Pressure: A 6-Part Compositional Individual Participant Data Analysis in the ProPASS Consortium. Circulation, 2024; DOI: 10.1161/CIRCULATIONAHA.124.069820

Courtesy:

University of Sydney. "Five minutes of extra exercise a day could lower blood pressure." ScienceDaily. ScienceDaily, 6 November 2024. <www.sciencedaily.com/releases/2024/11/241106190302.htm>.