Based on EU regulations
VITAMIN A
Pros: Helps maintain healthy skin and increases immunity
Recommended daily allowance (RDA): 0.7mg a day for men, 0.6mg for women
Cons: If pregnant, large amounts can harm unborn baby. Some evidence claims that an average of more than 1.5mg a day over several years can damage bones
VITAMIN B6
Pros: Assists formation of haemoglobin and allows the body to use and store energy
RDA: 1.4mg a day for men, 1.2mg for women
Cons: Large doses can lead to a loss of feeling in the arms and legs
VITAMIN B12
Pros: Helps creation of red blood cells and keeps nervous system healthy
RDA: 0.0015mg a day
Cons: No evidence on effects of high doses
VITAMIN C
Pros: Protects cells and helps body absorb iron
RDA: 40mg a day
Cons: Large amounts can cause stomach pain and diarrhoea
SELENIUM
Pros: Necessary for immune system and thyroid function
RDA: 0.075mg a day for men, 0.06mg for women
Cons: High levels can lead to loss of hair, skin and nails and in acute cases cause damage to the heart and lungs
IRON
Pros: Vital for creation of red blood cells
RDA: 8.7mg a day for men, 14.8mg for women
Cons: High doses may cause nausea, stomach pain, constipation and vomiting. Very high doses can be fatal
ZINC
Pros: Assists healing of wounds and the processing of fats, carbohydrates and protein in foods
RDA: 5.5-9.5mg a day for men, 4-7mg for women
Cons: High doses reduce the body’s absorption of copper, which can lead to anaemia and weakened bones