The underlying cause of most chronic disease is the long-term deficiency of micronutrients
But first, we need to talk about Energy. What exactly is it?
I guess, putting it simply, energy is the ability to do 'work', or if we consider energy in the body, it's what allows the body to be able to do 'stuff'. If you're anything like me, if I don't have any 'energy', all I want to do is flop on the sofa and do nothing.
So how do we get our energy? Simple - from food! Initially, that is. Whether horse, human or dog, and provided we eat species-appropriate food (there's my favourite mantra again - sorry!), the food we eat provides us with the energy nutrients that eventually 'fuel' our bodies, and depending on our mammalian species it typically comes from sugar, fat, protein and fibre - no prizes for guessing which one fuels our horses - lots of lovely cellulose/hemicellulose fibre from hay, hay, and more hay, to feed the hindgut fibre-fermenting gut microbes! 😉
These are the key energy sources for our bodies, but the fuel doesn't immediately land where it's needed for our bodies to then use it straight away. These nutrients have to be sent to the liver from the gut system to be broken down - correct term biotransformed, aka metabolising - into molecules (with a lot of help from other nutrients, i.e. vitamins/minerals etc). The liver then sends everything off to the kidneys which have the massive job of deciding a) whether that molecule is useful for the body, or b) whether it needs to be excreted.
If it's useful, it's absorbed back into the bloodstream and sent to the body's cells, and this is where the action happens, because ... Inside each and every cell in the body are the Mitochondria, tiny yet immensely powerful factories housed within the body's cells that take the biotransformed food nutrients we've eaten, and the oxygen we breathe, and convert them into the main energy currency that the body uses - ATP (more on this below). ATP basically makes the cells able to do their stuff.
Thing is, the mitochondria also need a whole lot of other components - micronutrients. We're talking vitamins, minerals, trace elements, amino acids, fats, phytochemicals (extracts from plants); you name it, all tiny molecules that have a distinct metabolic role in the cells of the body. Micronutrients are the foundation of any diet; if the body doesn't get these in plentiful supply, we're looking at cellular dysfunction that in time turns into a diseased organ and a sick body.
Which is why it's so vital to eat - to feed - the right foodstuffs. Choose the wrong food? The cells won't work. That iced bun you're about to eat? Stop! Grab an apple instead. That shiny bag of horse feed containing wheatfeed, molasses and soya? Noooooo! Because quite literally, without lovely healthy species-appropriate food full of essential nutrients, the body barely survives. We’re not so much looking at specific diseases but the key mechanism which unites them all – cells. Millions and millions of cells.
We keep talking about cells, but do we actually understand what they are, and what they do?
NB - Bit of a 🤓Science-Alert here! But hopefully not too brain-freeze-y - remember, I had to relearn this stuff in my 50s and I dropped science in my 3rd year of senior school as I was so rubbish at it, so if I can now get it, anyone can 😉
As we said in the opening page of our Immunity section, "The good news is that the default state of the body is one of continual cellular regeneration. Without this process, the body simply would not exist. However, when the body is sick, this re-generative process is overcome by a de-generative one." So what's the lifespan of a cell? Answer: It depends!
In our human body, there are approximately 37-trillion cells that make us up, but their lifespans differ depending on the type of cell and its function. Some replace themselves in just a few days, while others can take years. The cells in our small intestine live for 5-7 days, some of our immune cells up to 6-weeks, our liver cells around 5-months and fat cells an astonishing 10-years - no wonder they take so long to shift. This means that improving the health of cells is a gradual process ...
Cells are the basic building blocks of all living things - the human body alone is composed of trillions of cells. Together, they make up every part of all of - eyes, bones, skin, brain and heart, and each and every cell has a purpose - muscle cells make muscles work; brain cell make the brain work, or it might be neurons sending signals to the brain to help us see, smell, taste, hear and feel, or white blood cells that make up the immune system to fight off invaders; even the sex cells responsible for creating new life.
Cells provide structure for the body, take in nutrients from food, convert those nutrients into energy (ATP), and each tiny, microscopic cell has many parts, each with a different function. It’s astonishing when we consider just how much they do, how much they allow us to do and what we would be without them. As impressive as these biological wonders are, they’re not perfect - they're as susceptible to wear and tear as we are.
Cells manage a wide range of functions in their tiny package - growing, moving, housekeeping, and so on - and most of their functions require energy. But how do cells get this ATP energy in the first place? Like us humans search for substances like fossil fuels to power our homes, cells seek their energy in the form of food molecules or sunlight. In fact, the sun is the ultimate source of energy for almost all cells, because photosynthetic algae, plant cells, and just for the record a weird thing called prokaryotes (a specific bacteria which has no internal membranes), all harness solar energy and use it to make the complex organic food molecules, that other cells rely on, for the energy required to sustain growth, metabolism, and reproduction.
So, back to this ATP energy. Adenosine triphosphate, aka ATP, is an organic compound (and something else called a hydrotrope, but that's way too science-y) that provides the energy to drive many processes in living cells. Muscle contraction? ATP. Nerve impulse? ATP. Cells make energy-rich molecules like ATP via various energy pathways, including photosynthesis from the sun which we already know about. Also, glycolysis, and this is important when it comes to our horses - a bit science-jargon-y but only one-sentence's worth so stick with me - glycolysis is a multi-step metabolic pathway where one molecule of glucose breaks down into two molecules of pyruvate, an important chemical compound. Basically, glycolysis is the output of glucose metabolism, which is then used to provide further energy. TaDah!
Any excess energy is then stored in larger, energy-rich molecules such as - and we've all heard of these - polysaccharides (starch and glycogen) and lipids (fats). These are then held in reservoirs within the cells, some of which are large enough to even be visible in electron micrographs.
Glycogen' pretty well known - a synthesized (polymer) form of glucose, which a cell can rapidly mobilise whenever it needs quick energy. An example - athletes who 'carb-load' by eating pasta the night before a competition do so to try and increase their glycogen reserves. Under normal circumstances, though, us humans store just enough glycogen to provide a day's worth of energy. Plant cells don't produce glycogen but instead make different glucose polymers known as starches, which they store in granules.
Both plant and mammalian cells store energy by shunting glucose into fat-synthesis pathways - one gram of fat contains nearly six times the energy of the same amount of glycogen, but the energy from fat is less readily available than that from glycogen. Still, each storage mechanism is important because cells need both quick and long-term energy depots.
Fats are stored in droplets in the cytoplasm - I know, sounds like some ghostly spectre but it's actually the thick solution that fills each cell. Here's another one for our horses - our horses' crests? Adipose cells are specialised for this type of storage because they contain unusually large fat droplets - this is 'adipose tissue'. Humans generally store enough fat to supply their cells with several weeks' worth of energy.
The horse's energy
So, there's a bit of science-y background into the biology of ATP, the main energy of the body. So let's look at from where - and how - our horse's energy comes from.
You've probably seen many mentions on this website of the horse's energy being produced from 'hindgut forage-fibre fermentation', and yes this is absolutely right - a horse has evolved to produce its energy from fibre, created in the hindgut by the hindgut microbes, and they produce it via three volatile fatty acids - Propionate, Butyrate and Acetate. But it's a bigger picture than this because as we now know, these three fatty acids need to be converted to ATP.
Imagine travelling to Paris for a city-break and trying to pay for your coffee with £-sterling. It's not going to happen, because we're trying to use the wrong currency. It's the same with energy - there are different energy currencies. Every currency has its value but along with fibre as the main energy food source, there are also different energy currencies that horses take in with their feeds. Sugar, for one; fat also has its own energy currency, and, it's the same for those all-important volatile fatty acids – they're all different energy currencies but they all have to be changed to ATP, because all the reactions in the body that use energy, i.e. muscle movement, only work with ATP.
As ATP is the energy currency of the mitochondria at the body's cellular level, all other energy currencies need to be changed to ATP. It doesn’t matter which tissue or cell or process you look at, whether it’s muscle movement or cellular energy - they all need ATP to work, and the process that changes these different energy currencies is the Citric Acid Cycle, aka the citrate cycle, aka TCA.
If you look at chemistry books, you'll see TCA described as "providing the electrons that fuel the process of oxidative phosphorylation-- our major source of ATP and energy", or, slightly less science-y for my aching brain that makes a little more sense to me, "In all organisms except bacteria the TCA cycle is carried out in the matrix of intracellular structures called mitochondria. The TCA cycle plays a central role in the breakdown, or catabolism, of organic fuel molecules—i.e., glucose and some other sugars, fatty acids, amino acids ..."
Different mammals have different energy currencies, i.e. a dog's energy currencies come from proteins and fats (which are then changed to ATP) because the feed for a dog is basically other animals, hence fat and protein. However, for a horse, and going back to the wild horse model, fat and protein were always sparse in the tundra/steppe and semi-desert environments so horses never evolved or adapted to use these sources as energy; essential building blocks for the body for sure, but with their energy coming from another source, namely fibre, as plant fibre is what was abundant in wild horse nutrition. Hence why horses developed their hindgut microbiome to obtain their energy out of the fibres, with the hindgut microbes producing the three volatile fatty acids, with proprionate and butyrate able to be absorbed directly into the bloodstream and put straight into the citrate cycle.
Pulling all this together, the body’s main energy currency is ATP but it’s not fed as ATP – we feed (or eat) other energy sources which are then transformed.
So what feeds our cells to make them work? !
Cellular nutrients come in many forms - molecules of minerals and vitamins, as well as sugars and fats, and so much more. In order to provide a cell with energy, these molecules have to pass across the cell membrane, which functions as a barrier, but not an impassable one. Unlike plant cell walls which are solid, the mammalian cell membrane is semi-permeable - in much the same way that doors and windows allow necessities to enter the house, various proteins that make up the cell membrane allow specific molecules into the cell.
So there's this awesome thing that is a body's cell done! Now let's head onwards to the importance of the those micronutrients, and getting them right to fix the cell to get the body well.
To make any sense about how the body functions, especially when things are going wrong, we need to look to the physiology of the body, the How & Why, as in How stuff happens to the body and Why stuff happens to it.
The first step in understanding this is to have a bit of a handle on how the body normally works when it’s healthy, and what then happens when it isn't, when it’s placed under chronic stress or dis-eased (no longer at ease); essentially when it's changed from a state of balance to where part, or all, of the body is no longer functioning.
Yes there’s a bit of science involved here, but in kids-speak hopefully, because I am no science-geek, and when I had to learn this stuff in my medical herbalist training I had to have it in a way I understood it till I got it. Bear with me, because this will all come together in the end 😉
So, first up, some quick terms that we all know - anatomy is the structure of the body, with physiology being how it all works, and pathology explaining what’s happening when it's all going wrong, i.e. the science behind the causes and effects of dis-ease. It's all well and good saying 'my horse is stressed/depressed/shut down/whatever', but trust me when I say no pill is going to fix it.
As the saying goes, we have to go much deeper and 'fix the cell to get well.' We look to understand the how and the why of what's gone wrong at cellular level, so we can fix it, reboot everything and get the body healthy again. We also need to look at each case on an individual basis, as in the how/why your horse has got to where they are, because while the symptoms may be the same, the cause(s) may be very different to another horse. Symptoms are there to warn us that something’s going on deeper down, so we need to ask how/why this is happening, as there may be one symptom causing several imbalances, or one imbalance causing several symptoms.
Ultimately we're looking to identify factors that may have predisposed, provoked, and contributed to pathological changes and dysfunctional processes in a horse’s physiology, so we can identify any lifespan cause-effect connections leading to the current health issues that might otherwise go unnoticed. This should lead to the physiological systemic source in order to see what imbalances need correcting, alleviating or fortifying.
So here we go. There are several levels of structural organisation in the organism (body) and they're all connected, so let's start at the bottom, as this is where it all starts, literally, and work our way up:
The chemical level
This is where it all begins - we're talking molecules and chemical atoms, essential for maintaining life. Horse or human, we’re one big lump of chemistry! We’re talking gazillions of incredible chemical reactions happening all the time. Think magnesium, calcium, copper, zinc, iron ... the list goes on, and we have to have the right chemicals in the right ratios to each other to make sure we work properly.
Next, the cellular level - introducing the Mitochondria and how to fix the cells
We've already touched on cells above, so we know they're the basic structural and functional units of the body, and - there are bazillions of multi-trillions of them. Blood cells, nerve cells, muscle cells, you-name-it cells. This is where everything Starts to Happen, or, for that matter, Stops Happening. This is where we discover the incredible mitochondria, so we're going to take a quick digress from the How & Why and get back to it in a mo.
The Mighty Mitochondria - every cell's energy source
Image - a grass cell under a microscope. See those smiling faces? Meet the mitochondria!