Vitamin and mineral deficiencies can cause real symptoms, but tiredness, breathlessness or tingling have many possible explanations. An online checklist can't tell iron deficiency from thyroid disease, low B12, poor sleep or another condition.
Lentils, eggs, fortified cereal, frozen greens, dairy or alternatives, modest amounts of meat and tinned fish provide useful nutrients at ordinary prices. Vitamin D is a common exception where UK supplement guidance applies because sunlight is limited for part of the year.
Speak to your GP when symptoms persist rather than buying several high-dose supplements. Blood tests can identify what is actually low, and the right treatment is safer and usually cheaper than guessing.
Iron without steak every night
Iron comes from meat, fish and poultry as well as lentils, beans, eggs and fortified cereals. Plant iron is absorbed less readily, but pairing it with vitamin C from tomatoes, peppers or fruit can help.
Tea and coffee can reduce iron absorption when taken with a meal, so leave a gap if iron deficiency is a concern. Lentils stirred into mince and frozen spinach in curry are affordable contributors, but persistent symptoms need assessment rather than guesswork.
Lentils, chickpeas, beans, eggs, sardines and lean meat can all contribute iron.
Vitamin C at the same meal can improve absorption of iron from plant foods.
If you take prescribed iron, ask a pharmacist how to space it from calcium supplements and medicines.
Heavy periods, pregnancy and some digestive conditions can increase the risk of deficiency and may need assessment.
B12 for vegetarians, vegans, and older adults
Vitamin B12 is found naturally in animal foods and added to some cereals, nutritional yeast and plant drinks. People following a vegan diet need a reliable supplement or consistent fortified source.
Absorption can also fall with age or certain medical conditions and medicines. Tiredness, pallor, tongue soreness, numbness or tingling have many possible causes, so ask your GP about testing rather than self-diagnosing.
Vitamin D in a British winter
Current UK guidance advises most people to consider 10 micrograms of vitamin D daily in autumn and winter, with some groups advised to take it throughout the year. Oily fish, egg yolks and fortified foods contribute, but food alone may not be enough.
Avoid high-dose supplements unless they have been recommended for you. Vitamin D is fat-soluble and excessive amounts can be harmful.
Fatigue deserves a proper look
Poor sleep, anaemia, thyroid disease, low mood and many other conditions can cause tiredness. A clinician can assess the pattern and arrange appropriate tests rather than leaving you to stack supplements.
Fortified breakfast cereals, breads and plant drinks can provide useful nutrients at a modest cost. Read the label for the nutrients added as well as sugar and salt.
Fortification complements a varied diet; it does not replace vegetables, pulses and other whole foods. Choose products that fit meals you already eat.
A normal shop that covers bases
A practical shop might include eggs, pulses, frozen spinach, an oily fish option and fortified cereal or milk. That covers several nutritional bases without creating a separate deficiency diet.
Supplements should follow current guidance or an identified need. Prescribed iron, for example, is treatment for a reason, not an everyday insurance policy.
High-dose iron can cause side effects and may delay investigation of bleeding or another underlying cause. B12 and vitamin D treatment also depends on the reason and severity of deficiency.
Use food to support a varied diet, but ask for clinical assessment when symptoms persist or risk factors are present.