Thermally treated wine retains vasodilatory activity in rat and guinea pig aorta

Antioxidant profile of mulled wine

The aim of the study was to compare chemical and nutritional profile of wine and heat-treated wine, called mulled wine. The experiment was focused on simulation of ordinary produce mulled wine by the majority of consumers. Cabernet Moravia (bottled in Velkobí­lovická ví­na s.r.o., Czech Republic) was used for the experimental production of mulled wine. Following spices were added to wine during cooking: cloves (Vitana, Czech Republic) and cinnamon (KOTíNY, Austria). The samples of wine were heat treated in stainless steel pot for 5 minutes. The relative density, acidity, alcohol content, phenol content and antioxidant capacity were monitored in experimentally produced wine and mulled wine. The gained results showed that samples of mulled wine with added cloves had statistically significant (p <0.05) higher phenol content and higher antioxidant properties in comparison with wine before heat treatment and spices addition. The results clearly showed that mulled wine can be considered as the product with better health beneficial nutritional profile than wine from which it is produced; in addition, mulled wine sample had significantly (p <0.05) lower alcoholic content (8.27 ±0.04 vol.%).

Early and Late Cardiovascular and Metabolic Responses to Mixed Wine: Effect of Drink Temperature

Aim: Red wine is usually ingested as an unmixed drink. However, mixtures of wine with juices and/or sucrose (mixed wine) are becoming more and more popular and could be ingested at either cold or hot temperature. Although the temperature effects on the cardiovascular system have been described for water and tea, with greater energy expenditure (EE) and lower cardiac workload with a colder drink, little information is available on the impact of temperature of alcoholic beverages on alcoholemia and cardiometabolic parameters. The purpose of the present study was to compare the acute cardiovascular and metabolic changes in response to mixed wine ingested at a cold or at a hot temperature.

Methods: In a randomized crossover design, 14 healthy young adults (seven men and seven women) were assigned to cold or hot mixed wine ingestion. Continuous cardiovascular, metabolic, and cutaneous monitoring was performed in a comfortable sitting position during a 30-min baseline and for 120 min after ingesting 400 ml of mixed wine, with the alcohol content adjusted to provide 0.4 g ethanol/kg of body weight and drunk at either cold (3°C) or hot (55°C) temperature. Breath alcohol concentration was measured intermittently throughout the study.

Results: Overall, alcoholemia was not altered by drink temperature, with a tendency toward greater values in women compared to men. Early responses to mixed wine ingestion (0–20 min) indicated that cold drink transiently increased mean blood pressure (BP), cardiac vagal tone, and decreased skin blood flow (SkBf) whereas hot drink did not change BP, decreased vagal tone, and increased SkBf. Both cold and hot mixed wine led to increases in EE and reductions in respiratory quotient. Late responses (60–120 min) led to similar cardiovascular and metabolic changes at both drink temperatures.

Conclusion: The magnitude and/or the directional change of most of the study variables differed during the first 20 min following ingestion and may be related to drink temperature. By contrast, late changes in cardiometabolic outcomes were similar between cold and hot wine ingestion, underlying the typical effect of alcohol and sugar intake on the cardiovascular system.