The purpose of this study was to assess impact of different volumes of exercise as well as cumulative moderate to vigorous physical activity (MVPA) on energy intake (EI) and diet quality, as assessed by the Healthy Eating Index-2010(HEI-2010), across a 12-month weight maintenance intervention. Participants were asked to attend group behavioural sessions, eat a diet designed for weight maintenance and exercise either 150, 225 or 300 min/week. Dietary intake was assessed by 3-d food records, and MVPA was assessed by accelerometry. Two hundred and twenty-four participants (42·5 years of age, 82 % female) provided valid dietary data for at least one time point. There was no evidence of group differences in EI, total HEI-2010 score or any of the HEI-2010 component scores (all P > 0·05). After adjusting for age, sex, time, group and group-by-time interactions, there was an effect of cumulative MVPA on EI (1·08, P = 0·04), total HEI-2010 scores (–0·02, P = 0·003), Na (–0·006, P = 0·002) and empty energy scores (–0·007, P = 0·004. There was evidence of a small relationship between cumulative daily EI and weight (β: 0·00187, 95 % CI 0·001, P = 0·003). However, there was no evidence for a relationship between HEI total score (β: −0·006, 95 % CI 0·07, 0·06) or component scores (all P > 0·05) and change in weight across time. The results of this study suggest that increased cumulative MVPA is associated with clinically insignificant increases in EI and decreases in HEI.

Sarcopenia is more common in the elderly and causes adverse outcomes with increased morbidity and mortality. This prospective cohort study assessed the association of sarcopenia risk with the severity of COVID-19 at the time of admission and during hospitalisation and the length of hospital stay. Two hundred patients (aged ≥ 60 years) who were hospitalised for COVID-19 were enrolled using consecutive sampling between 29 December 2020 and 20 May 2021. The sarcopenia score of the patients was assessed using the Strength, Assistance in walking, Rising from a chair, Climbing stairs, and Falls questionnaire. The severity of COVID-19 was determined using the modified National Early Warning Score (m-NEWS) system for 2019 n-CoV-infected patients at admission (T1), day three (T2) and at discharge (T3). Data were analysed using SPSS, version 22 and STATA, version 14. Of the 165 patients included, thirty four (20·6 %) were at risk of sarcopenia. The length of hospital stay was slightly longer in patients with sarcopenia risk, but the difference was not significant (P = 0·600). The adjusted OR of respiratory rate (RR) > 20 /min at T1 for the sarcopenia risk group was 6·7-times higher than that for the non-sarcopenic group (P = 0·002). According to generalised estimating equations, after adjusting for confounding factors, the m-NEWS score was 5·6 units higher in patients at risk of sarcopenia (P < 0·001). Sarcopenia risk could exacerbate COVID-19 severity and increase RR at admission, as well as the need for oxygen therapy at discharge.

Adoption of healthy dietary and snacking habits could support optimum physical and mental development in children as they define health in adulthood. This study assessed parameters associated with children’s snacking such as food home availability, parenting practices, and parents’ health beliefs. In this cross-sectional study 12 039 children, 49·4% boys 5–12 years, participating in the European Feel4Diabetes-Study were included. Children’s weekly consumption of sweets and salty snacks, home availability of snacks, food parenting practices, and health beliefs were assessed via questionnaires. Logistic regression was applied to explore associations of a) home availability of snacks, b) food parenting practices (permissiveness and rewarding with snacks) and c) parent’s opinions on deterministic health beliefs with children’s consumption of sweets and salty snacks. Results showed that home availability (sweets: ORadj: 4·76, 95 % CI: 4·32, 5·23; salty snacks: ORadj: 6·56, 95 % CI: 5·64, 7·61), allowing to consume (sweets: ORadj: 3·29, 95 % CI: 2·95, 3·67; salty snacks: ORadj: 3·41, 95 % CI: 2·98, 3·90) and rewarding with sweets/salty snacks (sweets: ORadj: 2·69, 95 % CI: 2·23, 3·24; salty snacks: ORadj: 4·34, 95 % CI: 3·57, 5·28) ‘sometimes/or less frequently’ compared to ‘always/or often’ were associated with lower weekly consumption of sweets and snacks. Parents’ disagreement compared to agreement with deterministic health beliefs and inattentive eating were associated with lower consumption of salty snacks and sweets in children. Overall, the findings of this study indicate that attempts to promote healthy snacking habits in children should aim to improve parental dietary habits, food parenting practices, health beliefs, and reducing home availability of unhealthy foods and snacks.

Studies were carried out on conscious female non-pregnant (NP) and pregnant (P; third-trimester) dogs (n 16; eight animals per group) to define the role of the liver in mixed meal disposition with arteriovenous difference and tracer techniques. Hepatic and hindlimb substrate disposal was assessed for 390 min during and after an intragastric mixed meal infusion labelled with [14C]glucose. The P dogs exhibited postprandial hyperglycaemia compared with NP dogs (area under the curve (AUC; change from basal over 390 min) of arterial plasma glucose: 86 680 (sem 12 140) and 187 990 (sem 33 990) mg/l in NP and P dogs, respectively; P < 0·05). Plasma insulin concentrations did not differ significantly between the groups (AUC: 88 230 (sem 16 314) and 69 750 (sem 19 512) pmol/l in NP and P dogs, respectively). Net hepatic glucose uptake totalled 3691 (sem 508) v. 5081 (sem 1145) mg/100 g liver in NP and P dogs, respectively (P = 0·38). The AUC of glucose oxidation by the gut and hindlimb were not different in NP and P dogs, but hepatic glucose oxidation (84 (sem 13) v. 206 (sem 30) mg/100 g liver) and glycogen synthesis (0·4 (sem 0·5) v. 26 (sem 0·7) g/100 g liver) were greater in P dogs (P < 0·05). The proportion of hepatic glycogen deposited via the direct pathway did not differ between the groups. Hindlimb glucose uptake and skeletal muscle glycogen synthesis was similar between the groups, although final glycogen concentrations were higher in NP dogs (9·6 (sem 0·6) v. 70 (sem 0·6) mg/g muscle; P < 0·05). Thus, hepatic glucose oxidation and glycogen storage were augmented in late pregnancy. Enhanced hepatic glycogen storage following a meal probably facilitates the maintenance of an adequate glucose supply to maternal and fetal tissues during the post-absorptive period.

The present study was designed to examine the effect of cellulose (CL) on postprandial glycaemia and insulinaemia when ingested with glucose (G), casein (CS) and maize oil (CO) in various combinations. The study was conducted on five healthy male volunteers, on each of whom five meal tolerance tests were performed. The meals were isoenergetic and consisted of G; G and CL; G, CS and CL; G, CO and CL; G, CS, CO and CL. The meals were administered after an overnight fast. In addition to a fasting venous blood sample, blood was collected 0.5, 1.0, 1.5 and 2.0 h after ingestion for measurement of serum glucose and insulin levels. The glycaemic response to G+CS+CL and G+CS+CO+CL was significantly lower, while the insulinaemic response to G+CL was significantly higher than that to G. Addition of CL to G did not alter the glycaemic response, but accentuated the insulinaemic response. Further addition of CS in isoenergetic meals attenuated the glycaemic response, which may be because of a reduction in the amount of G in the meals. Like CS, CL also seemed to have an insulinotropic effect. The mechanism of the insulinotropic effect of CL cannot be deduced from the present study, but it is possible that like G, CL also stimulates gastric inhibitory peptide (GIP) secretion from the duodenum, which in turn stimulates insulin secretion.

1. Guinea-pigs were growth-retarded in early life by feeding their mothers a restricted quantity of food during the second half of pregnancy. After birth, all animals were fed ad lib. Body-weights were recorded weekly and behavioural tests were made on adult males. The animals were then killed and their brains dissected into forebrain, cerebellum and brain stem. These regions were weighed and DNA-phorphorus content measured.

2. At 14 weeks each male was paired with another male for 10 min on four consecutive days and their social behaviour scored. Tests 1 and 2 were on like-treatment pairs and tests 3 and 4 on unlike-treatment pairs. At 25 weeks the same animals were subjected to six graded series of brief, unavoidable shocks and their responses recorded. After 3 d, thresholds of aversion to electric shock were measured by recording the period of time spent on the ‘safe’ side of a rectangular box at five shock levels.

3. Undernourished guinea-pigs were significantly lighter than controls at birth but not at adulthood. Regional brain weights and DNA-P content of previously-undernourished guinea-pigs were significantly lower than those of controls, with the greatest deficit in brain stem.

4. Pairs of previously-undernourished guinea-pigs began to interact more quickly and threatened and nosed each other more often than pairs of controls. In mixed pairs previously-undernourished animals chased controls more than their control partners chased them. There were no differences between groups in responsiveness to unavoidable shock or in aversion thresholds.

Methionine is a precursor of s-adenosylmethionine, the main donor of methyl radicals for methylation of DNA and other compounds. Previous studies have shown that reduced availability of methyl radicals during pregnancy/lactation decreased offspring perigonadal white adipose tissue (PWAT) and body weight. Therefore, we aimed to evaluate the effects of methionine supplementation during early development, a time of great ontogenic plasticity, by assessing the biometric, biochemical and behavioural parameters of the offspring of adult Swiss female mice supplemented with 1 % methionine in water 1 month before pregnancy, during pregnancy or pregnancy/lactation. After birth, the offspring were distributed into three groups: control (CT), methionine supplementation during pregnancy (SP) and methionine supplementation during pregnancy and lactation (SPL), and were followed until postnatal day (PND) 300. No changes were observed in offspring birth weight in both sexes. At PND 5, 28 and 90, no differences in body weight were found in females; however, at PND 300, SP and SPL females showed an increase in body weight when compared with the control group. This increase in body weight was accompanied by a total and relative increase in PWAT, and a decrease in locomotor activity in these groups. No differences in the body and organ weights were found in male offspring. In conclusion, the increased availability of methyl radicals during pregnancy and lactation impacted long-term body composition and locomotor activity in female offspring.

The remarkable increase over the past 40 years in some chronic diseases, including the metabolic syndrome, has increased the demand for government and international policies to encourage various approaches to decrease the risk of these diseases. There are some prerequisites for working out successful national food and nutrition policies. Firstly, it is necessary to have a clear picture of the dietary pattern in a country and its associated public health problems. Based on these data, nutrient recommendations and goals are formulated by international or national scientific committees. Governments should translate these nutrient goals into food goals and eventually into national dietary guidelines. The means by which the national authorities can implement a nutrition policy include fortification and supplementation. Equally important are educational and informative tools, such as labelling on the packed food products including information about ingredients and nutrient content. With respect to the metabolic syndrome, this implies nutrient recommendations regarding the intake of fat and carbohydrates (energy per cent) and dietary fibre; dietary guidelines regarding balance between energy intake and expenditure; decreased consumption of products rich in fat and increased consumption of cereals and other products rich in dietary fibre, etc.; recommendations from the authorities regarding nutrient labelling (content of fat and dietary fibre) on relevant products; and nutrient and health claims and other aids (symbols) as tools to make it easier for consumers to select the appropriate food products.

Dietary cholesterol induces hepatic inflammation and fibrosis in animals. We aimed to determine whether dietary cholesterol affects liver-related mortality in hepatitis C virus (HCV)-infected patients. We performed a retrospective cohort study using extended follow-up data from the Hepatitis C Antiviral Long-Term Treatment Against Cirrhosis Trial. The study included HCV patients with advanced fibrosis and compensated cirrhosis. The analysis included 657 patients who completed two FFQ. We assessed whether cholesterol intake, measured in mg/4184 kJ (mg/1000 kcal) of energy intake, was associated with liver-related death or transplantation. In 4·7 (sd 1·6) years, the incidence of liver-related death (n 46) or transplantation (n 52) was 31·8/1000 person-years. The relationship between cholesterol intake and liver-related death or transplantation was significantly different between men and women (test for interaction, P value=0·01). Each higher quartile of cholesterol intake was associated with an increased risk for liver-related death or transplantation in women (adjusted hazard ratio (AHR) 1·83; 95 % CI 1·12, 2·99; Ptrend=0·02), but not in men (AHR 0·96; 95 % CI 0·76, 1·22; Ptrend=0·73). Compared with women whose cholesterol intake was within the recommended guidelines (300 mg/d with a 8368 kJ (2000 kcal) diet), women who consumed more cholesterol had significantly increased risk for liver-related death or transplantation (AHR 4·04; 95 % CI 1·42, 11·5). High dietary cholesterol was associated with an increased risk for liver-related death and transplantation in HCV-infected women with advanced fibrosis or compensated cirrhosis. Future studies should assess whether reducing cholesterol intake, among women who consume an excessive amount, can decrease HCV-related mortality.

1. A description of the population resident on Tristan da Cunha during the winter of 1966 is given.

2. Sources of food supplies are discussed.

3. A brief description of island meal patterns is given and methods of food preparation are discussed.

4. Samples of unusual foods and unique dishes consumed on Tristan da Cunha were collected and analysed for moisture, total nitrogen, fat, calcium, iron and ascorbic acid.

5. The dietary patterns and way of life of the Islanders resident on Tristan da Cunha have changed owing to contact with the outside world and to the development of a monetary economy. These changes were accelerated by the enforced period of 2 years spent in England. The Islanders are now very dependent upon a cash economy and subsistence agriculture provides only a relatively small part of the present diet.