Daily vitamin intake: recommended doses and food sources

Vitamins don’t give you energy directly, but without them your body simply doesn’t work the way it should. Getting the right amounts of vitamins affects metabolism, muscle recovery, immunity and even how well you sleep. Below is a practical overview — what dose, what function, where to get it.

Why your vitamin intake matters

Vitamins work like tiny switches in the body’s chemical factory. One enzyme needs a B vitamin, another needs copper, a third needs magnesium — and if any of them is missing, the whole reaction is left unfinished. For anyone who trains, that means poorer recovery, less strength and often chronic fatigue that doesn’t go away no matter how long you sleep.

To be honest, most people in Estonia get the essential vitamins from an ordinary, varied diet. The problem starts when the menu is one-sided — for example in winter, when fresh leafy vegetables are scarce, or in a gym phase where all the focus goes on protein and the calories come from the same three foods. That’s when gaps quietly start to form.

Fat-soluble vitamins: A, D, E, K

These four vitamins are absorbed only together with fat, and the body keeps them in reserve in the liver and fatty tissue. That means two things: on the one hand, you don’t need to eat them every day; on the other, taking too much is more dangerous than with water-soluble vitamins.

A
Daily dose: 5000 IU
Function: improves vision, is needed for the growth of skin, bones and teeth, and for strengthening immunity.
Sources: milk, cheese, butter, eggs, liver, spinach, broccoli, orange fruits and vegetables (carrots, pumpkin, sweet potato).

D
Daily dose: 200–400 IU (more is often recommended during the Estonian winter).
Function: helps calcium and phosphorus get absorbed, keeps bones and the immune system in good shape.
Sources: fatty fish (salmon, mackerel, sardines), egg yolk, liver, margarine and, of course, the sun itself — but from November to February in Estonia, the sunlight you get won’t meet your needs.

E
Daily dose: 30 IU
Function: an antioxidant that stabilizes cell membranes.
Sources: vegetable oils (especially sunflower and olive oil), green leafy vegetables, sprouts, whole grains, nuts and seeds.

K
Daily dose: 60–80 mcg
Function: needed for blood clotting and helps direct where calcium goes in the body.
Sources: green leafy vegetables (kale, spinach, broccoli), cabbage, milk, liver.

Water-soluble vitamins: C and the B group

The body doesn’t store water-soluble vitamins — whatever is left over leaves in the urine. That’s why it makes sense to get them every day rather than in one big dose once a week.

C
Daily dose: up to 1000 mg (the official minimum is lower, ~75–90 mg, but athletes and smokers need more).
Function: collagen synthesis, antioxidant, takes part in amino acid metabolism, strengthens the immune system and helps iron absorption.
Sources: citrus fruits, cabbage, green vegetables, berries (blackcurrants!), bell peppers, tomatoes, potatoes.

B1 (thiamine)
Daily dose: 1.1–1.4 mg
Function: carbohydrate metabolism, normal nervous system function, appetite regulation.
Sources: pork and beef, liver, whole grains, legumes, nuts.

B2 (riboflavin)
Daily dose: 1.1–1.4 mg
Function: keeps skin and eyes healthy, takes part in energy production.
Sources: milk, yogurt, cottage cheese, liver, eggs.

B6
Daily dose: 1.3–2.0 mg
Function: helps produce red blood cells and takes part in protein metabolism.
Sources: green leafy vegetables, meat, fish, chicken, legumes, bananas, whole grains.

B12
Daily dose: 2.4–2.6 mcg
Function: synthesis of new cells (especially nerve cells), helps keep homocysteine levels under control.
Sources: meat, fish, chicken, shellfish, milk, cheese, eggs. For vegetarians, B12 is the one vitamin you have to deal with deliberately.

The simple truth: if you eat vegetables of different colors, some fish each week and a proper bowl of breakfast porridge, you’re in the green zone for most of the amounts above.

FAQ: vitamin intake and doses

Do the standard daily vitamin recommendations cover an athlete’s needs?
Official recommendations are drawn up for the average sedentary person. For an athlete with a high training volume, the need for vitamins C, B and D is usually higher, but rarely by multiples. A varied diet and, if needed, a modest multivitamin usually cover the gap.

Do bigger doses speed up muscle growth?
No. Once the amount is already sufficient, extra doesn’t make anything better — excess vitamin C and B vitamins leave in the urine, while excess A and D can build up over time and damage the liver.

What should you do in winter when the sun disappears?
A vitamin D supplement is a sensible choice for many people in Estonia from November to March. The exact dose is determined by a blood test (25-OH-D), not by guessing.

You can find vitamins as dietary supplements here: https://turg.fitness.ee/et

Author: Liis Arula

Come and work out! ArtGym