This is because some vitamins and minerals such as vitamin C, folate (B9), vitamin E and iron can increase acid production in the stomach and bring on nausea, so try to take supplements at mealtimes. Food provides a buffering effect which can neutralise stomach acid.
But routinely getting an overload of vitamins and minerals can hurt you. Too much vitamin C or zinc could cause nausea, diarrhea, and stomach cramps. Too much selenium could lead to hair loss, gastrointestinal upset, fatigue, and mild nerve damage.
Your supplement contains too much caffeine
“If you take an energy-boosting supplement that has high amounts of caffeine or another unknown stimulant, you can get the jitters, heart palpitations, and high blood pressure,” Dr. Cherukuri says. “It can also keep you up at night.”
Can you really "feel" your multivitamin working? The short answer is that some people might feel a difference, and some people might not. That said, you can feel good about the fact that you're helping fill the nutrient gaps in your diet and investing in your health with the right multivitamin.
Vitamin D overdose can contribute to high levels of calcium in the blood. Vitamin A overdose can cause nausea and vomiting, dizziness, blurry vision.
This is because some vitamins and minerals such as vitamin C, folate (B9), vitamin E and iron can increase acid production in the stomach and bring on nausea, so try to take supplements at mealtimes. Food provides a buffering effect which can neutralise stomach acid.
While this may be true to an extent, it's essential to note that taking too much of specific vitamins can cause fatigue. For example, vitamins B6 and B12 play a key role in energy metabolism. However, taking large doses of these vitamins can also cause fatigue and other symptoms such as headaches, diarrhea, and nausea.
Ask your doctor to perform blood tests to determine what vitamin and mineral deficiencies you may have, and to establish a baseline by which you can measure the benefits of your multivitamin. Be sure to schedule follow-up lab tests 30 days after you begin a new multivitamin regimen.
Nervous System Reactions
After getting a vitamin B12 injection some people may experience a disturbance to the nervous system. These symptoms may include dizziness, difficulty walking normally, nervousness, anxiety, weakness and uncoordinated movements.
Answer: Dizziness has been reported as potential side effect of using supplements such as garlic, melatonin, saw palmetto, red yeast rice, policosanol, L-glutamine, and black cohosh.
Too much copper can have a powerful effect on the mind and alter mood and behaviour. The accumulation of excess copper in the brain enhances the production of stimulatory neurotransmitters (epinephrine and norepinephrine), which can further promote anxiety.
Combining multiple supplements or taking higher-than-recommended doses can increase the risk that they can cause harm, said Kitchin. "You really can't get toxic doses of nutrients through food, but you can absolutely get toxic doses through supplements," Kitchin said.
The fat-soluble vitamins A and D are the most likely to cause toxicity symptoms if you consume them in high amounts.
B12 Causes Psychiatric Symptoms: B12 deficiency can cause almost any psychiatric symptom, from anxiety, and panic to depression and hallucinations. This is because B12 deficiencies trigger symptoms in the nervous system and red blood cells.
Based on current research, it usually takes 1-3 months of consistent supplementation to correct a vitamin deficiency. If you're severely deficient in a vitamin, it may take longer to restore optimal levels.
Generally speaking, the more severely deficient you are in a vitamin or nutrient, the faster you'll see a difference when taking supplements. However, in most cases, it takes around three to six weeks to see noticeable changes.
My sister-in-law said that the best way to test your vitamins is to place them in a glass of water. If they haven't dissolved in 50 minutes, it's likely you aren't absorbing any of the goodness that's inside that capsule or tablet.”
Magnesium assists in the activation of vitamin D, which helps regulate calcium and phosphate homeostasis to influence the growth and maintenance of bones. All of the enzymes that metabolize vitamin D seem to require magnesium, which acts as a cofactor in the enzymatic reactions in the liver and kidneys.
Vitamin deficiency can cause a number of symptoms, including fatigue, dry skin and hair, depression, poor wound healing, and more. While they can vary between deficiencies, many of them overlap. Usually, noticeable effects don't begin to develop until you've had low levels for several months.
Many multivitamin products also contain minerals such as calcium, iron, magnesium, potassium, and zinc. Minerals (especially taken in large doses) can cause side effects such as tooth staining, increased urination, stomach bleeding, uneven heart rate, confusion, and muscle weakness or limp feeling.
If you take a multivitamin, it's probably because you want to do everything you can to protect your health. But there is still limited evidence that a daily cocktail of essential vitamins and minerals actually delivers what you expect. Most studies find no benefit from multivitamins in protecting the brain or heart.