Smith Andrew
Food and chemical toxicology, 2002
Abstract
The literature suggests that the following effects on behavior of adult humans may occur when individuals consume moderate amounts of caffeine. (1) Caffeine increases alertness and reduces fatigue. This may be especially important in low arousal situations (e.g. working at night). (2) Caffeine improves performance on vigilance tasks and simple tasks that require sustained response. Again, these effects are often clearest when alertness is reduced, although there is evidence that benefits may still occur when the person is unimpaired. (3) Effects on more complex tasks are difficult to assess and probably involve interactions between the caffeine and other variables which increase alertness (e.g. personality and time of day). (4) In contrast to the effects of caffeine consumption, withdrawal of caffeine has few effects on performance. There is often an increase in negative mood following withdrawal of caffeine, but such effects may largely reflect the expectancies of the volunteers and the failure to conduct "blind" studies. (5) Regular caffeine usage appears to be beneficial, with higher users having better mental functioning. (6) Most people are very good at controlling their caffeine consumption to maximise the above positive effects. For example, the pattern of consumption over the day shows that caffeine is often consumed to increase alertness. Indeed, many people do not consume much caffeine later in the day since it is important not to be alert when one goes to sleep. In contrast to effects found from normal caffeine intake, there are reports that have demonstrated negative effects when very large amounts are given or sensitive groups (e.g. patients with anxiety disorders) were studied. In this context caffeine has been shown to increase anxiety and impair sleep. There is also some evidence that fine motor control may be impaired as a function of the increase in anxiety. Overall, the global picture that emerges depends on whether one focuses on effects that are likely to be present when caffeine is consumed in moderation by the majority of the population or on the effects found in extreme conditions. The evidence clearly shows that levels of caffeine consumed by most people have largely positive effects on behavior. Excessive consumption can lead to problems, especially in sensitive individuals.
| PMID: | 12204388 |
|---|---|
| Category: | Weight Loss |
The best supplements with Caffeine in Weight Loss category:
- KetoCharge -
KetoCharge - Activate the power of ketosis in your body to burn fat Fast!
KetoCharge ramps up your body’s natural production of ketones. It contains among others: Caffeine. - Raspberry Ketone Plus - VitaPost Raspberry Ketone Plus is formulated around the botanical extract, raspberry ketone. It contains among others: Caffeine.
- Keto Pro - Here is a new product that will exponentially boost your weight loss! Keto PRO contains raspberry ketones that will allow you to burn your fat naturally. It contains among others: Caffeine.
- ACUTS, Amino-Charged Energy Drink, Blue Raspberry, 7.4 oz (210 g) (ALLMAX Nutrition) - Purpose: Formulated to provide Energy, Focus and Diet Support in conjunction with a Sensible Diet, Exercise and / or Physical Activity. It contains among others: Caffeine.
- Meratol - Weight loss is a challenge for the majority of people. It contains among others: Caffeine.
- Keto Actives - Keto Actives is a modern dietary supplement that helps you lose weight even when it comes to the most difficult parts of your body. It contains among others: Caffeine.
- PhenQ - PhenQ is a powerful new dieting formula combining multiple weight loss benefits to help you get the slim, sexy body you’ve always wanted. It contains among others: Caffeine.
- Phen24 - Weight loss is a 24-hour process, so why take a pill that only works during the day? Phen24 combines two products – day and night – to complement your diet, exercise, and sleep for round-the-clock weight loss. It contains among others: Caffeine.
- Triapidix300 - For many years doctors tried to find an effective product that would be both safe and highly effective. It contains among others: Caffeine.
- Fast Burn Extreme - Fast Burn Extreme is a unique multi-component fat reducer. It contains among others: Caffeine.
- Silvets - Silvets constitute modern tablets that facilitate weight loss dedicated to those persons that wish to lose weight and stay in a good mood. It contains among others: Caffeine.
- Nuratrim - Nuratrim formula works by helping boost energy levels, digestion and metabolism. It contains among others: Caffeine.
- Raspberry Ketone 700 - Raspberry Ketone 700 is a dietary supplement for people, who want to crack the excess weight and burn unwanted fat once and for all. It contains among others: Caffeine.
- Piperinox - Are you tired of constantly trying to lose weight? Choose Piperinox and enjoy a beautiful figure! Piperinox is a recommendable dietary supplement supporting the weight loss process. It contains among others: Caffeine.
- Fucoxanthin Plus - Fucoxanthin Plus by Vitabase includes the special weight loss ingredient fucoxanthin. It contains among others: Caffeine.
Articles similar to "Effects of caffeine on human behavior."
- The significance of Caffeine for Weight Loss: The effects of caffeine intake on weight loss: a systematic review and dos-response meta-analysis of randomized controlled trials. (This systematic review and meta-analysis of randomized controlled trials (RCTs) was performed to summarize the effect of caffeine intake on weight loss...)
- The impact of Caffeine on Weight Loss: Caffeine and exercise: metabolism, endurance and performance. (Caffeine is a common substance in the diets of most athletes and it is now appearing in many new products, including energy drinks, sport gels, alcoholic beverages and diet aids...)
- The significance of Caffeine for Weight Loss: The effects of a single-dose thermogenic supplement on resting metabolic rate and hemodynamic variables in healthy females-a randomized, double-blind, placebo-controlled, cross-over trial. (Recent investigations have identified that commercially available dietary supplements, containing a combination of thermogenic ingredients, can increase resting metabolic rate (RMR)...The thermogenic dietary supplement treatment experienced greater elevations in RMR as compared to baseline. Due to the slight elevations in blood pressure, caution should be taken for those with increased risk for hypertension or pre-hypertension. Taken on a daily basis, thermogenic dietary supplementation may increase overall energy expenditure, potentially leading to reductions in fat mass over time.)
- The role of Caffeine in Weight Loss: Eight weeks of supplementation with a multi-ingredient weight loss product enhances body composition, reduces hip and waist girth, and increases energy levels in overweight men and women. ( Numerous natural products are marketed and sold claiming to decrease body weight and fat, but few undergo finished product-specific research demonstrating their safety and efficacy... METABO administration is a safe and effective adjunct to an eight-week diet and exercise weight loss program by augmenting improvements in body composition, waist and hip girth. Adherence to the eight-week weight loss program also led to beneficial changes in body fat in placebo. Ongoing studies to confirm these results and clarify the mechanisms (i.e., biochemical and neuroendocrine mediators) by which METABO exerts the observed salutary effects are being conducted.)
Previous article
Next article
Caffeine and exercise: metabolism, endurance and performance.