
What are the side effects of B12 deficiency?
Side effects requiring immediate medical attention
- Abdominal or stomach pain
- bleeding from the gums or nose
- blue lips and fingernails
- chest pain
- cough
- coughing that sometimes produces a pink frothy sputum
- decreased urine output
- difficult, fast, noisy breathing, sometimes with wheezing
- difficulty with swallowing
- dilated neck veins
Can B12 interfere with sleep?
You don’t always know what you’re getting when you swallow a weight loss supplement. Although a deficiency of vitamin B12 can cause sleep problems, people who take vitamin B12 supplements may experience insomnia. As with vitamin D, too much or too little vitamin B12 can make it harder to sleep.
What are the side effects of B12 injections?
- B12 shots will benefit only those with a B12 deficiency and people with some underlying conditions.
- No research indicates that B12 shots will help with weight loss or benefit healthy individuals.
- B12 shots can have mild side effects like diarrhea and swelling at the injection site.
- Visit Insider's Health Reference library for more advice.
Does B12 deficiency affect metabolism?
People who are deficient in B12 can develop yellow skin, experience muddled thinking, and have a sluggish metabolism. How B12 Supports Energy. The most common side effect of a B12 deficiency is a persistent lack of energy. Not having the energy to do the things you want can seriously affect your mental and physical well-being, and, compounded over time, may lead to more serious health concerns.

Do B12 shots have caffeine?
Like other water soluble vitamins, excess intake of Vitamin B12 is not stored in the body, which is why a continuous supply is needed. However, unlike energy drinks that contain caffeine and only last for a few hours, the all-natural B12 vitamins give you several days of constant energy from just a single injection.
Is caffeine the same as B12?
Vitamin B12 is similar to caffeine in that it works with the nervous system. Caffeine has an effect on the nervous system, while B12 actually works to keep it healthy and firing at top speed. Whilst caffeine increases stress hormones in the body, B12 actually works to bring them down to normal levels.
Does vitamin B12 give you energy?
Is vitamin B12 good for energy? Yep! Thanks to its role in energy metabolism, vitamin B12 might reduce your chance of fatigue. It helps your body metabolize carbs, proteins, and fats, which your body converts into energy.
Can you replace caffeine with B12?
Vitamin B12 deficiency is another common culprit of fatigue, making it the perfect replacement for your current caffeine addiction.
Is B12 a stimulant?
After all, vitamin B12 isn't a stimulant. It doesn't give you more energy—rather, B vitamins play an important role in converting what you eat into energy. Said differently: while vitamin B12 is related to energy, it doesn't give you the same caffeine boost as a cup of coffee.
Do vitamins have caffeine?
Some multivitamin supplements already contain caffeine. So if you enjoy a steamy cup right after taking your multivitamin, you're getting way more caffeine than you may realize. The excessive amount of caffeine in your system can make your heart start racing and leave you jittery.
Does B12 wake you up?
That is, B12 can wake people up earlier. It may be the case that B12 advances sleep onset or rising time without necessarily allowing enough sleep, in particular when large doses of B12 are taken every day.
Do B vitamins contain caffeine?
No, vitamin B12 does not contain caffeine. The only similarity between B12 and caffeine is that they both work with the nervous system. Caffeine works to increase stress hormones and B12 works to bring them down to normal levels. They both produce energy and decrease fatigue, though in very different ways.
Is B12 good for anxiety?
While the participants in the vitamin B12 group reported a slight improvement in anxiety and depression symptoms compared to the placebo group, the researchers did not consider it significant.
What are the symptoms of B12 deficiency?
Symptoms of vitamin B12 deficiencya pale yellow tinge to your skin.a sore and red tongue (glossitis)mouth ulcers.pins and needles (paraesthesia)changes in the way that you walk and move around.disturbed vision.irritability.depression.More items...
How much vitamin B12 should I take a day?
The recommended daily amount of vitamin B-12 for adults is 2.4 micrograms.
What vitamins give you instant energy?
11 Vitamins and Supplements That Boost EnergyAshwagandha. Ashwagandha is one of the most important medicinal herbs in Indian Ayurveda, one of the world's oldest medicinal systems ( 1 ). ... Rhodiola Rosea. ... Vitamin B12. ... Iron. ... Melatonin. ... CoQ10. ... Creatine. ... Citrulline.More items...•
What is the replacement of caffeine?
Lemon water Switching up your morning beverage doesn't have to be complicated. Lemon water is a great way to start your day. It's calorie- and caffeine-free and provides an ample dose of vitamin C. As an antioxidant, vitamin C plays a role in your immune system and protects your skin from sun damage.
What vitamins are depleted by caffeine?
Caffeine can cause nutrient depletion of important nutrients, like vitamin B6, and interfere with nutrient absorption of essential minerals, including calcium, iron, magnesium, and B vitamins (Escott-Stump, 2008).
What foods is vitamin B12 in?
Sources of Vitamin B12. Vitamin B12 is naturally present in foods of animal origin, including fish, meat, poultry, eggs, and dairy products [5]. In addition, fortified breakfast cereals and fortified nutritional yeasts are readily available sources of vitamin B12 that have high bioavailability [12,13].
What are the symptoms of B12 deficiency?
Symptoms of vitamin B12 deficiencya pale yellow tinge to your skin.a sore and red tongue (glossitis)mouth ulcers.pins and needles (paraesthesia)changes in the way that you walk and move around.disturbed vision.irritability.depression.More items...
What are the effects of caffeine?
Stimulant: Caffeine's effects often depend on the individual. For some people, it can provide energy, focus, and alertness. In others, and especially at higher... Read More
What happens if someone overdoses on caffeine?
Caffeine O/D: Symptoms of caffeine overdose may include: Restlessness, ^ heart rate, palpitations, nausea, vomiting, anxiety, insomnia, ^ sweating, dizziness & ... Read More
Can you overdose on vitamin B12?
Sounds fine: You can't overdose on either. Here in Kansas City, especially in the mid-20th century, "vitamin B12 shots" weren't always just vitamin B12. I trust yo... Read More
Is caffeine addictive?
Caffeine: Yes in the sense that people do suffer mild withdrawal when they discontinue, particularly headaches.Best.
How much caffeine does a woman need to drink to lose magnesium?
According to the results of a small study published in Life Sciences, women between the ages of 31 and 78 years who consumed coffee with a 6 mg/kg ca ffeine concentration on two separate mornings experienced urinary losses of magnesium, calcium, sodium, chloride, potassium, creatinine, and water within 2 hours of intake.
How long should you separate caffeine from iron?
Per a review article published in Food Science and Quality Management : “Any beverage containing caffeine should be separated from iron-containing foods or supplements by at least one hour.”
How many cups of coffee do Americans drink?
Americans love their coffee. According to a survey cited by Statista, 29% of US coffee drinkers consume two cups of coffee daily, 13% drink three cups, 14% drink four to five cups, and 9% drink more than six.
Does caffeine affect calcium absorption?
Vitamin D plays a critical role in the absorption of calcium that is used to form bone. Caffeine acts as an inhibitor of vitamin D receptors, thus stymieing vitamin D absorption and possibly decreasing bone-mineral density, leading to osteoporosis
Does coffee affect vitamins?
The caffeine in coffee can impair the absorption of certain vitamins and minerals. The following are five nutrients that interact with caffeine.
Does caffeine affect energy?
All that coffee consumption equates to high energy levels—but beware, coffee lovers: Caffeine can impair absorption and facilitate ex cretion of certain vitamins and minerals. Beware, coffee lovers! The caffeine in coffee can impair the absorption of certain vitamins and minerals. The following are five nutrients that interact with caffeine.
Does caffeine cause calcium loss?
They concluded: “Therefore, caffeine-induced urinary loss of calcium and magnesium is largely attributable to a reduction in calcium and magnesium renal reabsorption, although the physiological mechanism and tubular segment affected remain to be established.”.
What is the energy vitamin B12?
B12 may be nicknamed the “energy vitamin”, but it does so much more. This important nutrient helps make the DNA in every cell of our bodies, maintains nerve cells, and is integral in the production of oxygen-carrying red blood cells. B12 deficiency is relatively common, especially among older people.
How to know if you need B12?
If you’re feeling sluggish, check out our signs you may need a B12 boost: 1 You’re Tired: Fatigue is one of the first signs of a B12 deficiency. Since B12 helps make red blood cells, a dip in production will mean less oxygen to keep your cells going. 2 You Feel Weak: If you can barely get up the stairs or lift your groceries, your muscles may not be getting enough oxygen. 3 You’re Anxious or Depressed: Low B12 levels can wreak havoc on our emotions, possibly because B12 is necessary for the production of neurotransmitters like dopamine and serotonin. 4 You Have Brain Fog: If you’ve felt like you’ve been losing your mind lately, and can never find your keys, low B12 may be to blame. 5 You’re Losing Weight: About 50% of people with a B12 deficiency lose the little bumps on their tongues - or papillae - some of which contain taste buds. This can lead to a decreased appetite and weight loss and may appear as a smooth, swollen, red tongue. 6 You’ve Been Getting a Lot of Colds: B12 is an important player in our immune system, helping to produce white blood cells. 7 You’re Hands and Feet Have Pins and Needles: Over time, a lack of B12 can lead to nerve damage, causing numbness, weakness and balance issues.
What does it mean when you are tired of B12?
You’re Tired: Fatigue is one of the first signs of a B12 deficiency. Since B12 helps make red blood cells, a dip in production will mean less oxygen to keep your cells going.
Why is B12 important?
You’ve Been Getting a Lot of Colds:B12 is an important player in our immune system, helping to produce white blood cells.
How long does the body store B12?
The body can store around about 2 to 4 years worth of B12, so changes in diet or digestion can take time to show.
Can you have low B12?
You may develop a B12 deficiency if you are a vegetarian, have low stomach acid, have any conditions which affects absorption in the intestines like Crohn's or celiac disease, have had weight loss surgery, or do not produce enough “intrinsic factor” - a protein which binds to B12 and aids in its digestion.
Do B vitamins give you energy?
While B vitamins DO help give you energy, it's not instantaneous. (That surge in energy you feel is from the caffeine also loaded into the bottle.) B vitamins help convert the food you eat into energy, but your body only needs a certain amount of these vitamins.
How much alcohol can lower B12 levels?
A study in nature showed that consumption of 1.5-3 drinks over the course of 8 weeks did decrease serum b12 levels by about 5 %. Here is the article related to alcohol and b12. .
What is the role of B12 in the digestive system?
Many digestive problem can lead to reduced absorption or malabsorption of all kinds f vitamins and minerals but specifically b vitamins. B12 has to be released from the food you eat and is done by the enzymes and acids in the digestive tract. Once mobilized b12 needs help to be absorbed. A special transporter called intrinsic factor is needed for b12. Such a delicate process can easily be interrupted and often is.
What medications lower B12 levels?
The main medications to be aware of are acid blocking and reducing medications like prilosec (omeprazole), ranitidine, zantac, Pepcid, nexium, etc.
How does B12 absorption change?
There are also several genetic alterations that can alter your b12 absorption. A SNP (single nucleotide polymorphism) known as FUT can both increase and decrease b12 absorption depending on which version of this SNP you have. The exact mechanism of how it changes b12 absorption is no clear but it is thought to be linked with both the prevalence of H. Pyloi infection and by default intrinsic factor production. Another genetic factor in b12 absorption is pernicious anemia. This is an autoimmune disorder where the body produces antibodies against intrinsic factor. This means the b12 cannot be transported from the intestines into the body.
Does coffee deplete B vitamins?
They found that the people with the highest levels of B12, tended to deplete b vitamins most. Those with lower levels of circulating B vitamins did not excrete as much. So the affect of coffee on B vitamin excretion is more pronounced the higher your levels of B vitamins are starting from. There are other studies that found coffee drinkers tend to have higher homocysteine levels which is a surrogate marker for b12 (and folate) deficiency.
Does caffeine increase B12?
Caffeine will increase the excretion of your B12 and other B vitamins. I have long been telling patients this but wanted to see if I could find research article supporting this. I did find a supporting article which you can read here .
What is the B12 vitamin?
Vitamin B12 is an essential nutrient that your body can’t make on its own, so you need to get it from your diet or supplements.
What is vitamin B12 deficiency?
You may develop a vitamin B12 deficiency if your body doesn’t produce enough intrinsic factor or if you don’t eat enough vitamin B12-rich foods ( 37 ).
How much B12 is in flat iron steak?
One grilled flat iron steak (about 190 grams) provides 467% of the DV for vitamin B12 (). Also, the same amount of steak contains reasonable amounts of vitamins B2, B3, and B6, as well as more than 100% of the DVs for selenium and zinc ( 13. Trusted Source.
How much vitamin B12 is in clams?
A 3.5-ounce (100-gram) serving of clams contains up to 99 mcg of vitamin B12, which is 4,120% of the DV. 3. Sardines. Sardines are small, soft-boned saltwater fish. They’re usually sold canned in water, oil, or sauces, though you can also buy them fresh.
How much B12 is in lamb liver?
A 3.5-ounce (100-gram) serving of lamb liver provides an incredible 3,571% of the Daily Value (DV) for vitamin B12 ( 4 ).
How much B12 is in trout?
A 3.5-ounce (100-gram) serving of trout fillet offers about 312% of the DV for vitamin B12 and 1,171 mg of omega-3 fatty acids ( 25 ).
Where does B12 bind to?
This substance binds to the vitamin B12 molecule and facilitates its absorption into your blood and cells. Your body stores excess vitamin B12 in the liver, so if you consume more than the RDI, your body will save it for future use.
How much caffeine should pregnant women consume?
Pregnant women should consume no more than 300 to 400 milligrams of caffeine per day, and people suffering from seizure disorders, irritable colon, depression, osteoporosis and cardiovascular problems may experience a worsening of their condition if they consume caffeine. Advertisement.
What happens if you are deficient in B vitamins?
If you are deficient in one of the B vitamins you may experience symptoms including tiredness, anemia, depression, loss of appetite, hair loss, muscle cramps, abdominal pain and respiratory illnesses. Advertisement.
Is it safe to drink coffee?
View Work. Moderate caffeine consumption is safe. Caffeine is a stimulant found in foods and beverages including coffee, tea, cola, energy drinks and chocolate. Some medications also contain caffeine. Although caffeine can give you energy and help you stay awake, it can cause side effects and may reduce the absorption of some vitamins and minerals.
Does caffeine affect homocysteine levels?
Caffeine and B Vitamins. A study on the effect of caffeine on homocysteine levels published in "The American Journal of Clinical Nutrition" found that caffeine intakes of up to 870 milligrams per day did not affect blood levels of folate, vitamin B-6 and vitamin B-12.
Vitamin B12 Benefits
Vitamin B-12 is found in almost all multivitamins, which is a testament to how valuable it is health-wise. Supplements are often recommended for those who are likely to have a B12 deficiency because of factors like a lack of dietary intake.
Vitamin B-12 in Excess
According to the American College of Cardiology, the recommended daily vitamin B-12 dosage is 2.4 micrograms. Vitamin B-12 deficiency can be a detrimental condition, and it's also possible to get too much vitamin B-12.
Vitamin B-12 Deficiency
Vitamin B-12 deficiency is not common, because the majority of people receive the required amount through diet alone. However, there are certain groups of people who may have a deficiency due to an inability to absorb vitamin B12 orally.
High Blood Pressure and Periods
There is no consensus regarding menstruation's effects on blood pressure. As blood pressure consistently rises and falls throughout the day, it is hard to pinpoint a direct causation, so any connection between high blood pressure and periods remains inconclusive.
High Blood Pressure
It is not uncommon for individuals to have high blood pressure and not even realize it, due to the subtle nature of the symptoms. The only way to have your blood pressure accurately checked is through a medical professional, so see your doctor if you have any such concerns.
Is This an Emergency?
If you are experiencing serious medical symptoms, please see the National Library of Medicine’s list of signs you need emergency medical attention or call 911. If you think you may have COVID-19, use the CDC’s Coronavirus Self-Checker .
