Moderate caffeine consumption may suppress appetite and stimulate the body to burn energy (3).
However, these effects appear to diminish once caffeine tolerance builds up (8).
This means that a weight loss tea with a high caffeine content will not be effective if you already consume caffeine daily. Even if you do initially lose some weight by increasing caffeine intake, the effects will be short lived.
However, one study found that habitual caffeine consumption may help with weight maintenance after weight loss has been achieved (4).
More information on caffeine's effect on weight loss can be found here.
These are some of the caffeine containing ingredients you may see in weight loss teas.
- Tea: this includes sench green tea, pu-erh tea and matcha green tea. See below for a look the weight loss properties of tea.
- Guarana: has a very high caffeine content and can be found in many weight loss products. There is a lack of evidence to suggest guarana has any weight loss properties aside from caffeine.
- Yerba Mate: also has a high caffeine content. Some studies have shown yerba mate may be able to suppress appetite and increase fat burning. However, most have been conducted on animals rather than humans (5, 6).
Summary: Most ingredients in weight loss teas do not have any solid scientific evidence to support their weight loss. Although caffeine has some positive weight loss effects they are insignificant and short lived.
Can Green Tea Help with Weight Loss?
Nearly all weight loss teas contain some form of green tea.
All types of tea—including green, black and oolong—actually come from the same plant. The difference lies solely in the method of processing.
In fact, herbal teas that do not contain leaves from this plant are technically not considered a tea. Herbal and fruit infusions are correctly known as tisanes.
The two active components of green tea that may contribute to weight loss are caffeine and catechins, which have antioxidant actions in the body. Green tea contains twice the amount of catechins as black tea.
The most potent green tea catechin seen advertised in health products is EGCG—short for epigallocatechin gallate.
The weight loss effects of EGCG appear to be most prominent when caffeine is also present. It relies on the effects of caffeine.
For example, there is no trend in fat loss percentage in the scatterplot diagrams below when comparing those who use green tea extract and placebo.
Interactions between time, treatment group and baseline BMI for changes in gynoid (A) and tissue (B) percent fat in overweight or obese women assigned to green tea extract or placebo for 12 months.National Center for Biotechnology Information
Unfortunately, as mentioned above, those who regularly consume caffeine will experience little to no weight loss benefits from green tea either (8).
This video describes the weight loss properties of green tea in more detail.Interestingly, race may also influence the weight loss effects of caffeine somewhat. Studies have shown a greater response in Asian populations compared to Caucasians (10).
Summary: Green tea does have some fat-burning and weight loss properties. However, these effects are not likely to produce any significant change in body weight.
What About Detox Teas … Do They Work?
Many weight loss teas also claim to be able to detox your body.
As with any commercial detox product, this is simply untrue.
Your liver, kidneys and immune system are all a healthy person needs to help eliminate everyday exposure to so-called toxins.
For a more in-depth look at debunking the detox myth, take a look at this article.
Summary: Detox products, including detox teas, do not work. Several organs detox your body as efficiently as possible.
Are There Any Other Benefits to Drinking Tea?
Tea is a healthy drink choice, especially if no sugar is added.
Replacing high-sugar, high-calorie beverages with a cup of hot or cold tea can help with weight loss and weight management, as tea is calorie free.
In addition, green tea in particular contains high levels of antioxidants and catechins.
Summary: Tea is a healthy alternative to sugary drinks. Not only is it naturally calorie free, but it contains beneficial compounds that can improve health.
Are There Any Side Effects?
Weight loss teas can produce the following side effects depending on the ingredients of the tea.
- Laxative effects: diarrhea, Stomach cramps and pain.
- Reduced efficacy of contraceptive pills.
- Sensitivity to caffeine: rapid heart beat, poor sleep, irritability.
- Contamination: Some herbal weight loss products may be contaminated with substances not declared in the ingredients.
Summary: Does Weight Loss Tea Work?
It's unlikely you will lose weight as a direct result of drinking weight loss tea.
The same goes for detox teas, fit teas or similar.
However, many weight loss teas come with a healthy meal plan and exercises to follow in addition to drinking the tea itself.
It's this improved diet and increased physical activity that is responsible for weight loss after drinking tea…not the tea itself.
If you like the taste and don't mind paying the inflated price, then weight loss teas are typically a safe and healthy choice.
Just know that regular green teas and herbal teas are equally as good for you … and much healthier for your wallet.
Reposted with permission from our media associate DIETvsDISEASE.
EcoWatch Daily Newsletter
A herdsman in the Chinese autonomous region of Inner Mongolia was diagnosed with the bubonic plague Sunday, The New York Times reported.
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By Matt Kasson, Brian Lovett and Carolee Bull
Home gardening is having a boom year across the U.S. Whether they're growing their own food in response to pandemic shortages or just looking for a diversion, numerous aspiring gardeners have constructed their first raised beds, and seeds are flying off suppliers' shelves. Now that gardens are largely planted, much of the work for the next several months revolves around keeping them healthy.
Start With Prevention<p>Just as preventive steps like maintaining a balanced diet help keep humans healthy, home growers can take many actions to help their gardens thrive.</p><p>One key step is assessing soil fertility – the ability of soil to sustain plant growth – which can vary widely depending on your location and soil type. Low soil fertility limits food production and predisposes plants to disease and pests. University extension <a href="https://soiltesting.wvu.edu/" target="_blank">soil testing labs</a> can help evaluate the quality of garden soil and identify nutrient deficiencies and acidic soils, often at no charge.</p>
Using weed barrier landscape cloth for planting rows and mulching between rows is an effective way to suppress weeds. Matt Kasson, CC BY-ND
Diagnosing Problems<p>Common plant pathogens include <a href="https://www.apsnet.org/edcenter/disandpath/viral/introduction/Pages/PlantViruses.aspx" target="_blank">viruses</a>, <a href="https://www.apsnet.org/edcenter/disandpath/prokaryote/intro/Pages/Bacteria.aspx" target="_blank">bacteria</a>, <a href="https://www.apsnet.org/edcenter/disandpath/nematode/intro/Pages/IntroNematodes.aspx" target="_blank">nematodes</a>, <a href="https://www.apsnet.org/edcenter/disandpath/oomycete/introduction/Pages/IntroOomycetes.aspx#:%7E:text=The%20oomycetes%2C%20also%20known%20as,foliar%20blights%20and%20downy%20mildews." target="_blank">oomycetes</a> and <a href="https://www.apsnet.org/edcenter/disandpath/fungalasco/intro/Pages/IntroFungi.aspx" target="_blank">fungi</a>. All of these microorganisms, especially at an early stage of infection, are too small to see. But when they proliferate, they cause changes in plants that we can recognize.</p><p>Unlike insects, which move around on six legs or on wings through the air, pathogens can move unseen and unchecked from leaf to leaf on the wind, through the soil or in droplets of water. Some microbes have even formed intimate relationships with insects and use them as vehicles to move from plant to plant, which makes these pathogens even more challenging to manage. Unfortunately, by the time some pathogens make their presence known, the damage is already done.</p><p>We recently conducted a <a href="https://twitter.com/kasson_wvu/status/1265989041725624323" target="_blank">Twitter poll</a> of gardeners nationwide to find out which culprits plagued their gardens. People named <a href="https://ento.psu.edu/extension/factsheets/aphids" target="_blank">aphids</a>, <a href="https://ento.psu.edu/extension/factsheets/squash-vine-borer" target="_blank">squash vine borers</a>, <a href="https://ento.psu.edu/extension/factsheets/squash-bug" target="_blank">squash bugs</a> and <a href="https://ento.psu.edu/extension/factsheets/flea-beetle" target="_blank">flea beetles</a> as the most problematic insect pests. Their most troublesome pathogens included <a href="https://extension.wvu.edu/lawn-gardening-pests/plant-disease/fruit-vegetable-diseases/powdery-mildew" target="_blank">powdery mildew</a>, <a href="https://plantpath.ifas.ufl.edu/rsol/Trainingmodules/BWTomato_Module.html" target="_blank">tomato bacterial wilt</a> and <a href="https://extension.wvu.edu/lawn-gardening-pests/plant-disease/fruit-vegetable-diseases/downy-mildew" target="_blank">cucurbit downy mildew</a>.</p><p>To manage such perennial challenges, the first step is to spend time closely looking at your plants. Do you notice any insects consistently hanging around, or molds colonizing leaves or other plant parts? How about symptoms such as blight, stunting, or leaves that are yellowing, browning or wilting?</p>
This white fungal growth is an early sign of powdery mildew on a leaf of susceptible summer squash. Matt Kasson, CC BY-ND
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By Emma Charlton
The effects of climate change may more far-reaching than you think.
Hotter temperatures have been linked to a rise in energy poverty, with more people struggling to meet their energy bills from their household income, according to a new study published on ScienceDirect by researchers from Italy's Ca' Foscari University.
Value of air conditioning imports in selected OECD countries. ScienceDirect
The ‘Golden Thread’<p>The <a href="https://www.endenergypoverty.org/reports" target="_blank">Global Commission to End Energy Poverty</a> calls access to energy the "golden thread" that weaves together economic growth, human development, and environmental sustainability. And one of the <a href="https://www.weforum.org/agenda/archive/sdg-07-affordable-and-clean-energy" target="_blank">United Nations' Sustainable Development Goals</a> is to ensure access to affordable, reliable, sustainable and modern energy for all by 2030.</p><p>Sustainability also has a large role to play in the future of energy and failing to embed green policies in COVID-19 stimulus packages and underinvesting in green infrastructure are current risks, according to the <a href="http://www3.weforum.org/docs/WEF_COVID_19_Risks_Outlook_Special_Edition_Pages.pdf" target="_blank">World Economic Forum</a>.</p><p>In its vision for a 'Great Reset' – building a better world after the pandemic – the Forum and the IMF jointly backed the <a href="https://www.weforum.org/agenda/2020/06/end-fossil-fuel-subsidies-economy-imf-georgieva-great-reset-climate/" target="_blank">transition to a green economy</a> and called for an end to fossil fuel subsidies.</p>
As if the surging cases of coronavirus weren't enough for Floridians to handle, now the state's Department of Health (DOH) has confirmed that a person in the Tampa area tested positive for a rare brain-eating amoeba, according to CBS News. The Florida DOH posted a warning to residents to remind them of the dangers of the rare single-celled amoeba that attacks brain tissue.
Scientists are urging the WHO to revisit their coronavirus guidance to focus more on airborne transmission and less on hand sanitizer and hygiene. John Lund / Photodisc / Getty Images
The World Health Organization (WHO) is holding the line on its stance that the respiratory droplets of the coronavirus fall quickly to the floor and are not infectious. Now, a group of 239 scientists is challenging that assertion, arguing that the virus is lingering in the air of indoor environments, infecting people nearby, as The New York Times reported.
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Along the northern shores of the Gulf of Mexico, oysters live in coastal estuaries where saltwater and freshwater meet and mix.
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Scores of people remained stranded in southern Japan on Sunday after heavy rain the day before caused deep flooding and mudslides that left at least 34 people confirmed or presumed dead.
Care Home Inundated<p>Altogether 16 residents at an elderly care home in Kuma Village are presumed dead after the facility was flooded by water and mud.</p><p>Fifty-one other residents have been rescued by boats and taken to hospitals for treatment, officials said.</p><p>Eighteen other people elsewhere have been confirmed dead, while more than a dozen others were still missing as of Sunday afternoon.</p><p>The Fire and Disaster Management Agency said many others were still waiting to be rescued from other inundated areas.</p><p>Hitoyoshi City was also badly affected by flooding, as rains in the prefecture exceeded 100 millimeters (4 inches) per hour at their height.</p>
More Rain Forecast<p>The disaster in the Kumamoto prefecture on Kyushu island is the worst natural catastrophe since Typhoon Hagibis in October last year, which cost the lives of 90 people.</p><p>Although residents in Kumamoto prefecture were advised to evacuate their homes following the downpours on Friday evening into Saturday, many people chose not to leave for fear of contracting the coronavirus.</p><p>Officials say, however, that measures are in place at shelters to prevent the transmission of the disease.</p><p>More rain is predicted in the region, and the Japan Meteorological Agency has warned of the danger of further mudslides.</p>
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