Frequently Asked Questions

Vitamins are organic compounds produced by plants or animals, while minerals are inorganic substances that come from soil and water. Your body needs both to function properly. Vitamins can break down when exposed to heat, air, or acid, whereas minerals maintain their chemical structure. Both are essential nutrients that support immunity, bone health, energy production, and countless other bodily functions.

The recommended daily amounts vary by age, sex, and life stage. Adults generally need vitamin C (90mg for men, 75mg for women), vitamin D (600-800 IU), iron (8-18mg), and calcium (1000-1200mg). The UK's National Health Service provides Nutrient Reference Values (NRVs) as guidelines. Individual needs may differ based on your lifestyle, diet, and any underlying factors. A varied, balanced diet from whole foods is the best foundation for meeting these needs.

Fat-soluble vitamins—A, D, E, and K—dissolve in fat and are stored in your body's fatty tissue. You don't need to consume them daily, and excess amounts can accumulate. Water-soluble vitamins—B-complex and vitamin C—dissolve in water and are not stored; excess amounts are typically excreted, so you need regular intake. This difference affects how your body absorbs, stores, and uses these nutrients.

Leafy greens provide folate and iron; citrus fruits and berries supply vitamin C; fatty fish offer vitamin D and omega-3s; eggs contain choline and lutein; nuts and seeds deliver vitamin E and magnesium; dairy products are rich in calcium and vitamin B12; whole grains provide B vitamins and zinc. A varied, colourful diet with vegetables, fruits, whole grains, legumes, and lean proteins typically covers most nutritional needs without supplements.

For most people eating a balanced, varied diet, whole foods provide sufficient nutrients. However, certain groups may benefit from additional support: vegetarians and vegans may need B12 sources; those with limited sun exposure may need vitamin D; pregnant women often need additional folate and iron; older adults may require more B12 and calcium. Your lifestyle, dietary choices, and individual needs determine whether food alone is sufficient. Consulting nutritional information helps identify any gaps.

Vitamin D supports calcium absorption for bone strength, regulates immune function, influences mood and cognitive performance, and maintains muscle function. Your body produces it when skin is exposed to sunlight, but sun exposure varies seasonally in the UK. Fatty fish, egg yolks, and fortified dairy products are dietary sources. Many healthcare providers recommend discussion about vitamin D intake, especially during darker months when sun exposure is limited.

Iron carries oxygen in your blood and supports energy production and cognitive function. There are two types: haem iron from animal products (better absorbed) and non-haem iron from plant sources. Women of reproductive age need 18mg daily; men need 8mg. Vegetarians and vegans, heavy menstrual bleeders, and athletes may have higher needs. Pairing iron-rich foods with vitamin C improves absorption. Red meat, lentils, fortified cereals, and leafy greens are good sources.

Calcium builds and maintains bone density, supports muscle contraction, and enables nerve signalling. Magnesium activates enzymes, supports muscle and nerve function, regulates blood pressure, and promotes relaxation and sleep quality. Adults need 1000-1200mg of calcium and 310-420mg of magnesium daily. Dairy products, fortified plant milks, and leafy greens provide calcium; nuts, seeds, whole grains, and dark chocolate are magnesium-rich. These minerals work together to support skeletal and cardiovascular health.

B vitamins (B1, B2, B3, B5, B6, B12, and folate) are essential for converting food into energy, supporting brain function, and maintaining nervous system health. They help produce neurotransmitters that regulate mood and cognitive clarity. B12 is particularly important for red blood cell formation and neurological function; vegetarians and vegans should seek reliable sources like fortified foods or nutritional yeast. Whole grains, legumes, eggs, and meat provide B vitamins. A deficiency can lead to fatigue and reduced mental clarity.

Antioxidants are compounds that protect cells from oxidative damage caused by free radicals. Vitamins C and E, selenium, and beta-carotene (converted to vitamin A) are key antioxidants. Vitamin C comes from citrus fruits, berries, and peppers; vitamin E from nuts, seeds, and vegetable oils; selenium from Brazil nuts, seafood, and eggs. A diet rich in colourful vegetables and fruits naturally provides a range of antioxidants. These nutrients support long-term health by reducing cellular stress.

Multiple nutrients support immune defence: vitamin C enhances white blood cell production; vitamin D regulates immune response; zinc helps develop immune cells; selenium acts as an antioxidant; and vitamin A maintains mucous membrane barriers. Adequate protein provides amino acids for antibody production. Vitamin B6 supports immune cell maturation. A balanced diet with varied whole foods—vegetables, fruits, lean proteins, and whole grains—naturally provides these immune-supporting nutrients. Consistent nutrition is more important than focusing on individual nutrients.

Yes, some nutrients can interact with medications. Vitamin K may reduce the effectiveness of certain blood medications; iron can interfere with some antibiotics; and calcium may block absorption of specific drugs. Conversely, some medications affect nutrient absorption—for example, certain digestive medications may reduce B12 uptake. If you take regular medications, discussing your diet and any nutrient supplementation with your healthcare provider ensures safe interactions. Timing and spacing can often minimise potential concerns.