Fibre is an essential part of the human diet, strategic reviews indicate that consuming just 30g of fibre a day is correlated to reduced risk of colon cancer, type-2 diabetes, heart attacks and strokes.
For most of us there is a simple thing we can do to improve our short and long-term health, eat more fibre! The role of fibre in regulating digestion has been understood by humans for hundreds of years. But the full benefits linked to fibre (also known as roughage) are only just starting to be understood. A recent study published in The Lancet1 analysed a wide range of research and found that a shortage of fibre in our diets is linked to greater risks of type-2 diabetes, bowel cancer, heart attacks and strokes. In addition people that eat more fibre tend to have lower weight, lower blood pressure and reduced cholesterol levels. Amazingly the research suggested that consuming a mere 30g (1oz) of fibre a day was sufficient to deliver the full range of health benefits. To put this into some kind of perspective the 30g target can be reached by consuming four slices of brown bread, eating a handful of nuts and seeds in addition to the regulation five portions of fruit and veg a day. In essence it is available to most of us with only a few small changes to our eating habits.
Fibre consumed through our diet can be divided into two types, soluble and insoluble. Soluble fiber is generally though of as a prebiotic, which means it supports communities of helpful bacteria in the gut microbiome. Insoluble fibre does not dissolve in water and typically passes through the digestive system aiding bowel movements. Most fibre rich foods contain soluble and insoluble elements, today food science is more concerned with the total amount of fibre rather than the different forms (cellulose, pectins and beta glucans) we eat.
In summary; fibre is an essential part of the human diet, strategic reviews of the available evidence strongly suggest that consuming 30g of fibre a day is correlated to reduced risk of colon cancer, type-2 diabetes, heart attacks and strokes. There is a growing body of evidence that fibre also plays an important role in maintaining helpful bacteria in the gut microbiome.
Lentils appear to have an important role to play in human health and wellbeing., particularly obesity.
A simple message; loose weight and improve your health by eating lentils.
I’m not really an advocate of taking the pleasure out of eating food, people must choose to eat what they want, what they can afford and what suits their lifestyle. I am however disappointed with the lack of relevant health messages provided for consumers (it is in some regards why this blog was started). I think the humble lentil illustrates this point particularly well. Lentils (in general) have a number of qualities not widely known about or discussed in the mainstream, they are high in fibre, low in fat, good sources of protein, they are widely available, easy to grow and relatively inexpensive. It should also be mentioned that they are ingredients in some very popular dishes including soups, stews and daals. Lentils are good for us on so many levels that the government and the NHS should be funding extensive lentil related research and promotions. We also now know that lentils are an excellent prebiotic.
In the context of food, prebiotics are fibre able to pass through the digestive system to the large bowel (colon), where they feed and thus encourage the growth of helpful bacteria.
At around 1% fat, lentils are a useful addition to the food cupboards of people striving to maintain a healthy body weight. There is also evidence that their prebiotic effects may also offer support in the fight against obesity. There is a growing body of scientific research suggesting that less calories and more prebiotics are correlated with lower levels of obesity. Prebiotics are now known to increase the quality and quantity of gut bacteria in the colon and lead to the augmentation in the production of short chain fatty acids (SCFA). SCFA are linked to both increased efficiency in the use of calories and decreased obesity. Overall, the evidence suggests that eating lentils regularly is associated with reductions in levels of obesity. Lentils also tend to make you feel full, which has obvious implications for health and diet.
Another key issue to mention is that lentils are high in protein, up to 20g in a 100g serving. This is particular useful for vegans and vegetarians whom sometimes struggle to find enough protein in plant based food. As well as protein you can expect to receive significant proportions of wider nutritional needs in from lentils, such as around half your daily recommended intake of Thiamine (B1), VB6, Folate (B9), Iron, Phosphorus and Zinc.
It should be pointed out again that lentils are tasty and versatile, their consumption doesn’t have to be a chore. The take home point is that by eating lentils three or four times a week you might be able to significantly improve your health and wellbeing in a number of ways. Always interested in receiving and publishing your lentil recipes!
To fully explore the benefits of lentils would require a series of articles but if anyone is interested in the specific role lentils have in reducing obesity, take a look at the work by Dil Thavarajah , Pushparajah Thavarajah, Casey R. Johnson and Shiv Kumar here.
Your diet can play a significant role in your chances of becoming obese, suffering from asthma or a range of other illnesses.
Discovery, a general science programme from the BBC World Service, has put together a helpful three part guide to the human microbiome. It is made for the wider World Service audience so it presents the issues in an interesting but accessible way. The discussion of the subject matter is engaging, and important contributions are made by leading scientists in the field such as Prof Rob Knight, from the University of California and Prof Tim Spector from Kings.
The show provides a general outline broken down into three parts; Manipulating Our Hidden Half, Dirt and Development and Gateway to the Mind. The idea that humans (in common with other animals) have not one but two genomes is central to this mini series. Our human genome is the one handed down to us through our parents, set in stone at conception. The so called second genome is made up of a vast pool of genetic diversity present in the microbes found throughout and within our bodies. The Human Microbiome Project has begun the process of analyzing the large number of microbes present in us. Two key issues that have started to excite scientists in recent years are,
the extent to which microbes can influence human health and experience.
the ability of individuals to alter their own microbial profile.
For example, it is generally observed that increased diversity of different kinds of helpful bacteria in the gut, is correlated with improved wellness. Studies in obesity, allergies, asthma and auto immunity suggest that gut bacteria may have a crucial role in meditating our health. This opens up the prospect that lifestyles remedies such as changes to diet may offer us significant potential benefits. It also raises the question about the long term benefits of medication known to have a detrimental affect on gut bacteria such as antibiotics.
This then takes us back to the discussion of probiotic and prebiotic food and drinks. When you consume products rich in helpful bacteria (probiotics) or the soluble fibre known to support microbial diversity in the large intestine (prebiotics), you are likely to be improving your health in a number of ways. It cannot yet be said that there is a direct causal relationship between your diet and certain illnesses. However the scientists are starting to think of gut bacteria as increasing or decreasing the chances of suffering from particular health problems.
At the time of writing all three programmes were freely available online or to download here.