all carrots are not created equal

The great debate about organic food has been whether it has significant health benefits over conventionally grown food. (There are other great debates about organic food as well, but one at a time) In order to better answer this question, a little bit about soil biology is essential.

My first encounter with serious biology was as a microbiologist , this has instilled in me a great respect for soil and the myriad creatures that work to create it. Healthy soil is an ecosphere in its own right containing various species of bacteria, fungi, worms, insects and other critters which we do not fully appreciate. It smells wonderful, is rich, loamy and contains high levels of organic compounds, nitrogen, phosphorus and potassium (NPK). It has the capacity to hold water in suspension and regenerate itself season after season if managed properly.

Traveling back to the 1940s - the English agronomist Albert Howard's groundbreaking study 'An Agricultural Testament' made its appearance with strong claims that synthetic fertilizer with artificially produced NPK will deplete soil fertility in the long run. This was a man who understood soil biology profoundly and has often been quoted since in other organic literature such as Wendell Berry and Rodale. These lions of the organic food movement understood way back then that the health of soil is intricately connected with human, animal and environmental health.

Fast forward today - agriculture is heavily industrialized with a lack of understanding or respect to the limits of the natural world. In a well-managed farm, there should be no need for fertilizer or pesticides with wastes being recycled and each system nourishing the other in a continuous loop. Today even organic farms have given in to intensive agriculture, demanding supply chains and the term itself can be often misleading. More about this later.

Coming back to the question of whether organic food is healthier for you: the answer is, yes. This was confirmed in 2003 by a study in UC Davis where varieties of corn, berries were grown in neighbouring plots using different methods. They were then compared for vitamins and polyphenols. The scientists found that sustainably cultivated crops had higher levels of these nutrients. Why are polyphenols important? These are secondary metabolites manufactured by plants, in other words, they are antioxidants and we all know why these are important. The reason why organic foods contain more polyphenols is this: these compounds are released by plant to ward off pests, diseases and insects - when ingested by humans, they continue to act in much the same way. These products then are results of natural selection and the coevolutionary relationship between plants and humans.

In our modern system of agriculture we fail to respect this. Plants grown with fertilizer/pesticide intensive methods fail to produce high levels of polyphenols because they simply do not need to and also because soil fertility inspite of chemicals is less than optimal. Rich, healthy, naturally managed soil adds a subset of polyphenols called flavonols which impart characteristic taste of a fruit or vegetable.

All carrots are therefore not created equal - the way we grow it, the quality of soil, what we feed that soil all contribute towards the qualities of a carrot.

The title of this post and a lot of its material is adapted from 'The Omnivore's Dilemma' - Michael Pollan. To anyone who has not read this book, it comes highly recommended.
Photo: Akhila Vijayaraghavan ©

welcome to the church of the holy cabbage. lettuce pray

Recently I have been doing a lot of research on food production as this is one of ways in which the environment is impacted. Not only is food growing an energy intensive process as it is largely dependent on fossil fuel resources, there are several steps in the production process that uses energy. Transportation of food not only domestically but also internationally contributes towards a large part of what I like to call 'foobon' footprint which is specifically carbon footprint of food. Additionally consuming packaged, frozen, processed food contributes towards this not only during the process itself but also the disposal of waste material created in the process.

The obesity epidemic we are currently seeing even in the developing world is tied into the way we view and consume food. This in turn is tied into the way we can change our eating habits in order to reduce individual foobon footprint. This will eventually lead to a healthy system and a cleaner planet.

I'm not touting becoming vegetarian or vegan or anything which seems extreme although people with these food habits usually have a lower foobon footprint. However, what I am promoting is eating locally, seasonally and if/where possible organically.

Eating locally produced food grown within a 100mile radius of where you live not only reduces energy used to transport food but also boosts local economy. In the bargain, the food you consume is fresher - better yet, if you have enough space grow your own vegetables and herbs. Even very small apartments have enough space for a herb-box at the very least.

Eating seasonally means you only eat fruits and vegetables which are grown in that season which means you reduce air-miles of those food which are brought in from other parts of the world.

Eating organic means cultivation of food without chemical pesticides and herbicides which is better for the soil. It also means that fresh food tastes better than chemically grown fruit and veg. Additionally, as a side point - eat whole-grain which is not only better for your body but also is less processed. Buy fair-trade where possible as it is a socially-responsible way to eat.

All this brings us to the great meat debate. Is there a greener way to eat meat? It is well known that the production of red-meat is energy intensive and releases methane. Again I would suggest eating locally or buying from a butcher rather than a supermarket which atleast reduces packaging and energy used in the packaging process. With most commercial fish species now endangered, the greenest way to consume seafood is to make sure it is sourced from ecologically managed fisheries. White meat from free-range farms generally have a lower foobon footprint. Finally if you are not inclined to become vegetarian then reduce the amount of meat you eat. The green stuff is better for you anyway!

Finally you are what you eat. And since eating habits are so deeply tied into ecological and biological systems, think before you munch.