Holland and Barrett iron liquid: what to know

Iron supports red blood cell production. Low iron can contribute to anaemia and symptoms such as fatigue, pale skin, generalised weakness, cold hands and feet or restless legs. These symptoms have several possible causes, so a blood test and clinical history are useful before starting a supplement.

Liquid iron is an oral form that may be easier for some people to swallow than tablets. The amount of elemental iron varies between products, so follow the product label and professional advice rather than comparing spoonfuls between brands. It can darken stools, cause nausea, constipation or stomach discomfort, and may stain teeth.

Use the supplied measuring device, keep the bottle out of children's reach, and do not take extra doses to make up for a missed dose without advice. Tell your pharmacist about antacids, thyroid medicine and other supplements because iron can affect absorption. Ask whether it should be separated from particular foods or medicines.

Treatment may need to continue after you feel better while blood tests recover. If symptoms persist, the reason for low iron may need investigation, including diet, blood loss or reduced absorption. Do not assume a liquid supplement is suitable during pregnancy or for a child without tailored advice.

Seek urgent help after an accidental large ingestion, especially by a child, or for severe abdominal pain, repeated vomiting, collapse or marked drowsiness. Arrange review for ongoing fatigue, breathlessness, fainting, blood in the stool, or symptoms that do not improve as expected.

Ask whether you need blood tests, which dose and duration are suitable, how to manage stomach effects, and whether another medicine or condition could explain your symptoms.