what are the side effects of to much vitamin b?
135938
['excessive thirst.', 'skin conditions.', 'blurry vision.', 'abdominal cramps.', 'nausea.', 'vomiting.', 'increased urination.', 'diarrhea.']
1365189
Oral vitamin B-12 is safe to take at recommended doses for healthy people. Injectable vitamin B-12, which is used to treat significant deficiencies, can cause the following side effects: mild diarrhea. itching.
55610
['weight loss.', 'nausea.', 'vomiting.', 'diarrhea.', 'rash.', 'skin sensitivity to sunlight.', 'hives.', 'anemia, and.']
936906
Taking too much vitamin D can cause problems such as constipation and nausea and, in more serious cases, kidney stones and kidney damage.
1322052
Although vitamin B12 is likely safe for most people when taken in reasonable amounts, it may cause certain side effects including diarrhea, blood clots, itching, and severe allergic reactions. In addition, combining vitamin B12 with chloramphenicol (an antibiotic medication) may produce harmful effects.
1073293
Other symptoms of vitamin B12 deficiency involve the digestive tract. These symptoms include nausea (feeling sick to your stomach) and vomiting, heartburn, abdominal bloating and gas, constipation or diarrhea, loss of appetite, and weight loss.
679976
['Neurological changes. A lack of vitamin B12 can cause neurological problems, which affect your nervous system, such as: ... ', 'Infertility. Vitamin B12 deficiency can sometimes lead to temporary infertility, an inability to conceive. ... ', 'Stomach cancer. ... ', 'Neural tube defects.']
322460
High doses of vitamin A can cause headache, depression, fatigue, irritability, aggression, even personality change and psychosis — a syndrome called hypervitaminosis A. So it's no surprise that there are concerns about Accutane side effects. Clinical trials have been reassuring.
1062386
Older adults and people with digestive tract conditions that affect absorption of nutrients also are susceptible to vitamin B-12 deficiency. Left untreated, a vitamin B-12 deficiency can lead to anemia, fatigue, muscle weakness, intestinal problems, nerve damage and mood disturbances.
738368
['nausea and vomiting.', 'diarrhea.', 'skin rash.', 'fever.', 'muscle aches.', 'increased liver enzyme levels.', 'liver damage.', 'dizziness.']
929203
While the recommended daily amount of vitamin B-12 for adults is 2.4 micrograms, you can safely take higher doses. 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: Dizziness.
62632
['nausea and vomiting.', 'diarrhea.', 'anorexia (appetite loss)', 'abdominal (stomach pain)', 'rash.', 'headache.', 'dizziness.', 'photosensitivity.']
977759
['decreased energy,', 'tiredness,', 'diarrhea,', 'dizziness,', 'drowsiness,', 'headache,', 'nausea,', 'vomiting,']
712400
Other side effects reported in patients receiving 15 mg daily include altered sleep patterns, difficulty in concentrating, irritability, overactivity, excitement, mental depression, confusion, and impaired judgment. Decreased vitamin B12 serum levels may occur in patients receiving prolonged folic acid therapy.
107369
Vitamin B12 injections are generally considered to be very safe. They have no major side effects. However, in very rare cases, some people can experience side effects caused by allergic reactions or sensitivity ( 29 , 30 ). If you experience any side effects, speak with your doctor.
708810
In some people, vitamin C might cause nausea, vomiting, heartburn, stomach cramps, headache, and other side effects. The chance of getting these side effects increases the more vitamin C you take.
332632
Overdoing B6 supplements can cause skin sores, a sensitivity to light, nausea, and heartburn. If you take too much for more than a year, you could have problems with your nerves and lose control of movements.