While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, higher doses have been found to be safe. Your body absorbs only as much as it needs, and any excess passes through your urine. High doses of vitamin B-12, such as those used to treat a deficiency, might cause: Headache.
Even the lowest doses in B12 supplements are many times the recommended dietary allowance. Doses up to 1,000 mcg, though unnecessary, aren't harmful.
Vitamin B12 is often used to improve cognitive function, depressive symptoms, and fatigue.
Vitamin B12 is essential for the production of red blood cells and DNA. It is also essential for the functioning of the nervous system. When your body does not receive enough vitamin B12 you may feel fatigued and tired all the time. It can also lead to weakness.
If you don't get enough vitamins and minerals in your diet, or enough glucose (sugar) in your blood, this can make you feel tired, lack energy and feel foggy. Not having enough iron in your blood can cause fatigue. This is called Iron deficiency. It may be that you're not getting enough iron in your diet.
Vitamin B is recommended as one of the top vitamins to help with tiredness, so you can also opt for a supplement if you're struggling to stay topped up through your diet. Vitamins should be used alongside a balanced diet.
It may take a few weeks before your vitamin B12 levels and symptoms (such as extreme tiredness or lack of energy) start to improve. If you have hydroxocobalamin injections to boost your vitamin B12 levels at the start of treatment, the cyanocobalamin tablets may start to work within a few days.
Fatigue. Megaloblastic anemia due to vitamin B-12 deficiency may lead to a person feeling fatigued. Without enough red blood cells to carry oxygen around their body, a person can feel extremely tired.
Once you begin treating your vitamin B12 deficiency, it can take up to six to 12 months to fully recover. It is also common to not experience any improvement during the first few months of treatment. If you can, it's a good idea to address what's causing the deficiency.
Constant exhaustion and weakness even after resting could be a sign of an underlying health condition or imbalance. Fatigue is just one of the possible symptoms of a possible B12 deficiency.
One Possibility: Supplement Allergies
Thus if you're otherwise healthy but still continue to feel tired after taking a B-12 supplement, it could be a sign of a mild allergic reaction. If a rash, difficulty breathing or swelling coincides with taking your dose of B-12, get to the doctor right away.
The dose of 2000 micrograms of B12 is more than 800 times the recommended daily amount so, on the face of it, this dose seems too high, but as you increase the amount of B12 in your diet, less of a percentage will be absorbed. Before continuing the B12, I would recommend getting your B12 level tested with your doctor.
Dosages for Older People
Around this age, you should be getting around 2.4 micrograms of B12 a day. Not only does this mean consciously eating foods that contain vitamin B12 but it also means that you should ingest this vitamin as a supplement. By taking supplements, you will ensure that your body absorbs vitamin B12.
Vitamin B-12 and other B vitamins play a role in producing brain chemicals that affect mood and other brain functions. Low levels of B-12 and other B vitamins such as vitamin B-6 and folate may be linked to depression.
While there is currently no cure for ME/CFS, there are treatments that may help you manage the condition. Treatments include: cognitive behavioural therapy (CBT) energy management – where you're given advice about how to make best use of the energy you have without making your symptoms worse.
Some conditions that cause fatigue include thyroid disorders, iron deficiency anemia, diabetes, chronic fatigue syndrome, and COVID-19. Some other causes of fatigue may involve your diet, sleep, and levels of stress. Lifestyle changes can often improve feelings of fatigue in these situations.
Mental laziness and lack of motivation can also be caused by one simple problem: not having enough exercise and nutrients in the body. One should consider eating healthy food high in protein, such as green, leafy vegetables, and fatty fish. Research also suggests eating berries and walnuts and drinking coffee or tea.
The two most likely reasons you're always so tired no matter how much sleep you get are you've got high sleep debt or you're not living in sync with your circadian rhythm. You may also feel sleepy if you're ill, pregnant, or you've got a medical condition like anemia or diabetes.
Sleep hygiene practices
not having a regular bedtime routine, which includes consistent sleep and wake times. taking long daytime naps. looking at phone or computer screens before going to bed. having a sleeping environment that is too hot, too bright, or too loud.
Vitamin B12, for example, should definitely be taken in the morning. This is because it is important for energy metabolism, which may interrupt your sleep if taken at night.