Biotin - None known. There is no UL (upper limit) set for biotin at this date as high doses do not present toxicity issues.
Calcium - Elevated blood calcium levels (hypercalcemia) which can trigger soft tissue calcification when occurring simultaneously when phosphorous levels are low.
Copper - Abdominal pain, nausea, cramps, diarrhea, vomiting and liver damage. When elevated copper levels collide with low zinc levels, the following conditions may arise or worsen: schizophrenia, hypertension, joint pain, fatigue, stuttering, headaches, hyperactivity - particularly in children, depression.
Fluoride - Stomach ulcers, nausea, vomiting, abdominal cramping.
Folate - Folic Acid - Nervous system disorders, abdominal and intestinal upset, irritability, insomnia, fatigue.
Iodine - Abdominal pain, nausea, vomiting, weak pulse, coma. Excessive iodine can also lead to goiter - a symptom also related to Iodine Deficiency.
Iron - Chiefly due to iron acquired from supplements or blood transfusions (rather than acquired from natural foods): Iron poisoning, vomiting, dizziness, weight loss, headaches, skin discoloration (bronze, grayish tint).
Too much iron may contribute to heart disease and cancer in men over 40, as well as contribute to rheumatoid arthritis.
Magnesium - Diarrhea, weakness, fatigue, drowsiness.
Manganese - Individuals exposed to manganese dust are at a higher risk in acquiring manganese toxicity. Symptoms mock Parkinson's disease.
Excessive consumption of manganese can lead to manganese madness characterized by the following symptoms: irritability, unpredictability often associated with violence, hallucinations.
Vitamin B5 - Pantothenic Acid - Mild diarrhea.
Potassium - Diarrhea, nausea, vomiting, gastric disturbances, abdominal pain, abdominal spasms, irregular heartbeat, muscle weakness, fatigue, including death.
Phosphorus - Diarrhea, nausea, vomiting, gastric disturbances, abdominal pain, abdominal spasms.
Selenium - Fatigue, skin disorders, dizziness, nausea, vomiting, anxiety and hair loss.
Sodium - Bloating, swelling and a decrease in urine output.
Vitamin A - Loss of appetite, irritability, fatigue, constipation, headaches, skin rashes including dry and itchy skin, hair loss, brittle nails, visual changes, bone, muscle and joint pain, menstrual issues, depression, schizophrenia, anemia, liver inflammation - including liver damage and fever. As a note, too much Vitamin A can also disrupt growth in children. An overage of Vitamin A may also increase risk of death.
Vitamin B1 - Thiamin - None known.
Vitamin B2 - Riboflavin - None known.
Vitamin B3 - Niacin - Extreme doses can result in liver damage as well as ulcers. Other symptoms of Vitamin B3 toxicity include: cramping, inflammation of the liver, an increase in blood sugar.
Vitamin B6 - Pyridoxine - Nervous system imbalances which can occur when supplementation exceeds 2 grams of B6 per day.
Vitamin B12 - Cyanocobalamin - None known.
Vitamin C - Absorbic Acid - No evidence of toxicity but may increase risk of forming uric acid kidney stones. May cause diarrhea.
Vitamin D - Loss of appetite, nausea, vomiting, high blood pressure, kidney ailments, and fatigue.
Vitamin E - None known when Vitamin E comes from natural food sources. Toxicity signs of symptoms associated with Vitamin E supplements can be serious and include: intestinal cramps, diarrhea, double vision, muscle weakness and fatigue.
Zinc - Metallic, bitter taste in the mouth, nausea, stomach pain, cramps, bloody diarrhea.
Vitamin K - None known when Vitamin K is derived from natural food sources. Side effects associated with Vitamin K supplements include: jaundice, hemolytic anemia and the excretion of glutathione (an internally produced antioxidant) from the body.