Vitamin B12 has always been associated with fighting fatigue and supporting nerve function. However, this complex vitamin with many biological functions that new research indicates extend beyond simple physical wellbeing.
Vitamin B12 has an established key role is the normal functioning of the brain and nervous system as well as for the formation of healthy blood cells and is involved in the metabolism of every cell in the body. For such an essential nutrient it may come as a surprise that the human body is unable to produce its own B12 and is completely reliant on dietary sources. While some may quote authorities who state that our bowel bugs generate some vitamin B12 it has been shown that this tiny trickle is not absorbed from the colon and serves as no real nutritional source. We vitamin B12, albeit in small amounts, but we have to get it from our diet. Some key dietary sources are describe later on but in essence there is no reliable non-animal source of vitamin B12 making it very difficult for strict vegetarians or vegans to obtain significant amounts.
Interestingly, vitamin B12 was initially discovered due to its relationship with the condition pernicious anaemia. This is an autoimmune disease whereby the cells in the stomach responsible for secreting intrinsic factor (IF), which is crucial for the absorption of B12, are destroyed.
Taking vitamin B12
Vitamin B12 is often used to treat nerve pain. In most cases, the reported benefit of B12 is related to the injected form of B12 in people suffering from nerve pains in relation to diabetic neuropathy or shingles pain.
There have been some news stories relating to poor B12 absorption in people taking gastric acid blocking drugs. These drugs take effect on the same cells within the stomach that produce IF. In regular users, regular tablets or capsules of B12 will not help much because the absorption of B12 has become impaired as a consequence of the drug action. This is where the suckable/chewable tablets (B12 Infusion tablets from Enzymatic Therapy) come into their own. Vitamin B12 can be effectively absorbed across the delicate membranes of the mouth in sufficient amounts to readdress any deficiency without the need for injection therapy in most cases. For those with true pernicious anaemia who need regular injections of B12 every 3 months a top-up using the B12 Infusion tablets in the month leading up to the next injection can offer a great ‘lift’ for those who notice a general low energy phase before their next injection. So long as the B12 is in the biologically active form known as methylcobalamin and in a chewable/suckable form dosing up on one tablet per day for a month or so could make all the difference to fatigue or ‘brain fog’. Even if you have not been using the acid-blocking drugs, it may be worth trying a course of sublingual B12 for a month especially if you are over 50 years old or follow a strict vegetarian or vegan lifestyle.
Chronic Fatigue Syndrome, Fibromyalgia and Vitamin B12
Scientific studies into the causes of fibromyalgia (FM) and chronic fatigue syndrome (CFS) are always interesting, especially when they appear to support what we notice in the clinic. In the case of vitamin B12 many FM/CFS sufferers report improved energy and overall well-being following a course of high-dose B12 supplementation over 4-6 weeks. Lending some scientific evidence to this anecdotal observation, a study carried out in Sweden back in 1997 gave support to the use of B12 in FM/CFS cases when it was shown that the fluids surrounding the brain and spinal cord (the cerebrospinal fluid of CSF) was significantly lower in vitamin B12 than expected. Having such a low CSF B12 level was closely associated with increased levels of a metabolite known as homocysteine. This in turn was linked to profound symptoms of fatigue. The study concluded that these findings were probably contributing to the FM/CFS in their study group. Sadly, since then, little work has been performed in this area of vitamin B12 research but a team from Kings College did provide preliminary evidence of reduced functional B vitamin status in CFS patients. It’s not often practical to perform routine blood testing for B-vitamin status in cases of FM/CFS let alone sampling of the CSF, but in the holistic management of this complex spectrum of disorders, a trial of vitamin B12 or a good vitamin B complex often yields impressive results and is well worth considering.
Product link: BioActive B12 infusion 1000mcg vitamin B12 in the sublingual methylcobalamin form