Mesolithic hunter-gatherers living on a meat-dominated, grain-free diet had much healthier mouths that we have today, with almost no cavities and gum disease-associated bacteria, a genetic study of ancient dental plaque has revealed.
An international team of researchers, led by a group at the Australian Centre for Ancient DNA, University of Adelaide, extracted DNA from dental plaque from 34 prehistoric northern European human skeletons, and traced the changes in the nature of oral bacteria from the last hunter-gatherers to Neolithic and medieval farmers and modern individuals.
"Dental plaque represents the only easily accessible source of preserved human bacteria," says lead author Dr Christina Adler, now associate lecturer in dentistry at the University of Sydney.
The researchers found the composition of bacteria changed with the introduction of farming and again 150 years ago during the Industrial Revolution.
In contrast to the hunter-gatherer and early agriculturist diet, a modern diet full of refined carbohydrates and sugars has given us mouths dominated by cavity-causing bacteria.
"What we found was that the early [hunter-gatherer] groups really had a lot lower frequencies of any of the disease-associated bacteria compared to what you see today [and] that the number of species per person's mouth, or the diversity, was much higher in the past," says Adler.
However, while the researchers noted that bacteria associated with dental cavities such as S. mutans became dominant around the time of the Industrial Revolution, the frequency of bacteria associated with periodontal diseases such as gingivitis has not changed much since farming began.
This may have implications for the notion that gum disease and associated bacteria are a significant contributor to the recent increase in conditions such as cardiovascular disease and atherosclerotic plaques, says co-author Professor Alan Cooper, director of the Australian Centre for Ancient DNA.
"It has been suggested that the presence of this permanent inflammation state along the gums was promoting an immune inflammatory response, which in turn leads to cardiovascular disease," says Cooper.
"The idea was that a recent increase in the bacteria P. gingivalis [which causes gingivitis], was associated with the recent increases in cardiovascular disease, however we could show that this particular species has been fairly stable throughout the farming period."
The results will no doubt be good news for advocates of the so-called 'paleolithic diet' - high in meat, low in grains. Cooper says it would be interesting to study the effects of the diet on the bacterial population of the mouths, particularly after reseeding with healthy bacteria.
The lipid theory of heart disease, linking saturated fat to coronary heart disease, continues to crumble.
Of course there never was any real solid science linking traditional saturated fats and cholesterol to heart disease, but that didn’t stop the pharmaceutical companies from making billions of dollars from the sale of cholesterol-lowering drugs...
Healthy People do Healthy Things In order to lead a healthy life one should make some important changes to one’s lifestyle .Below are some suggestionsIntroduce these necessary habits in your daily life and experience great positive gains to your health and wellbeing.Restrictions 1. Drink lots of pure filtered water or alkalised water. No soda or soft drinks allowed. They are very acid 2. Try to cut out all sugar and sugar products from the diet. These will destroy your health and feed your cancers. 3. Cut fried foods out of your diet. They do the most long term damage. Cancer forming carcinogens are developed when foods are fried at very hot temperatures 4. Try to replace dairy with amond milk, coconut milk. Milk destroys your body. Limit fruit juice. They are very sugary 5. Replace all wheat products with gluten free breads and cakes. There are many gluten free flours that can replace wheat and are quite nutritious and delicious. Never eat white flour. 6. Limit your fruit intake to 3 small servings a day. Eat more vegetables. They have the same nutrients found in fruit with less carbohydrates. Additions 1. Consume many vegetables with every meal. Eat as many raw as you can.. go dark green and colourful with your veggies. 2. Consume only healthy fats daily.These are: flax meal/oil, borage oil, fish oils, extra virgin olive oil. Eat these raw, not cooked.Take 1000 mg of omega 3fatty acids daily. 3. Eat some protein with every meal.Include protein with every meal. your breakfast should be made up mainly of protein and some healthy fats. Eggs, cheese, beans, meats and nuts would be good protein choices. 4. Enjoy three healthy meals a day with no snacking in between. Your last meal of the day should be consumed at least 4 hours before going to sleep. 5. Do some exercise! A body in motion stays in motion. Keep yourself fit with a daily exercise routine. 6. A good vitamin/mineral supplement is a must. Enzymes and probiotics are also necessary for good health. CELLFOOD is a marvelous mineral supplement. It contains 78 trace minerals, 17 amino acids, 34 enzymes and electrolytes.! Many benefits would accrue if you adopt these lifestyle changes! Your life is like a bank account. What you put in is exactly what you would draw out in your old age. You don’t want to end your life in constant pain.. Remember to lead a healthy life you have to make some healthy choices!
Photosynthesis is the single most important transformation on Earth. Using the energy in sunlight, all plants—from single-celled algae to towering redwoods—knit carbon dioxide and water into food and release oxygen as a byproduct. Every year, humanity uses up roughly 40 percent of the planet’s photosynthesis for our own purposes—from feeding a growing population to biofuels. Given that growing human population, is there a limit to how much of the world’s photosynthesis we can appropriate?
Satellite measurements now allow precise measurements of the amount of photosynthesis taking place on the planet’s seven continents and assorted islands—or what scientists call “net primary productivity.” Such measurements are based on the amount of ground covered by plants, the density of that growth, and observations of temperature, sunlight and available water. Using these measurements, ecological modeler Steven Running of the University of Montana concludes that plants produce nearly 54 billion metric tons of carbohydrates a year—the bulk of it the complex organic chains of cellulose and lignin.
Running has also looked back over the past 30 years and discovered that the total amount of photosynthesis is surprisingly stable. Despite local weather that ranged from droughts to floods, plants soldier on producing roughly the same amount of food year in and year out, varying by less than 2 percent annually. This may be because the inputs of photosynthesis also vary so little—sunlight strength fluctuates only mildly, as does precipitation on a global basis. This finding suggests to Running that the plants’ “net primary productivity” might be usefully thought of as a planetary boundary, a threshold or safe limit for human impacts on natural systems.
Uur population is estimated to swell to 9 billion by 2050. Will the photosynthesis on this planet be able to keep up?
Diets lean on meat and rich in healthy fats like olive oil were most effective at promoting weight loss and lowering blood sugar among people with diabetes in a review of evidence from the last 10 years.
Benefits were also seen with diets low in carbohydrates, high in protein or low in simple sugars.
The identity of the 15 experts who will frame the 2015 dietary guidelines for Americans has been announced by the U.S. Department of Health and Human Services (HHS) and the U.S. Department of Agriculture (USDA).
Sharing your scoops to your social media accounts is a must to distribute your curated content. Not only will it drive traffic and leads through your content, but it will help show your expertise with your followers.
How to integrate my topics' content to my website?
Integrating your curated content to your website or blog will allow you to increase your website visitors’ engagement, boost SEO and acquire new visitors. By redirecting your social media traffic to your website, Scoop.it will also help you generate more qualified traffic and leads from your curation work.
Distributing your curated content through a newsletter is a great way to nurture and engage your email subscribers will developing your traffic and visibility.
Creating engaging newsletters with your curated content is really easy.