Vitamins & minerals
The micronutrients that quietly run everything, ranked by how much they matter (especially for building muscle).
If macros are the bricks and the fuel, micronutrients are the spark plugs. You need only tiny amounts, but almost nothing in your body works without them. Switch the toggle to re-rank the list for muscle building or all-round health.
Rank by what matters most for
- 1Vitamin D D3 Top priority Vitamin
Deficiency is genuinely common in lifters (little sun, winter) and worth fixing for strength and bone. Topping up beyond a normal level will not boost testosterone, though.
SunlightSalmonEgg yolkFortified milk - 2Omega-3 EPA/DHA Top priority Fatty acid
Eases joint aches and inflammation and may slightly blunt soreness. The old "boosts muscle growth" claim has not held up if your protein is already adequate.
Oily fishFish oilWalnutsFlax - 3Magnesium Mg Top priority Mineral
Powers contraction and energy, and can improve sleep, mostly noticeable if you were running low to begin with.
NutsSeedsDark chocolateSpinach - 4Zinc Zn Important Mineral
Important for immunity and hormones, and you lose it through sweat. It only lifts testosterone if you were actually deficient, it is not a booster.
BeefShellfishPumpkin seedsLentils - 5Iron Fe Important Mineral
Low iron quietly tanks endurance and energy. Watch it if you train hard or menstruate.
Red meatLiverLentilsSpinach - 6Calcium Ca Worth covering Mineral
Strong bones handle heavier loads, and muscles cannot fire without it.
DairyYoghurtTofuLeafy greens - 7Vitamin B12 B12 Worth covering Vitamin
Key for energy and oxygen delivery. Very commonly low on plant-based diets.
MeatFishEggsDairy - 8Vitamin C C Worth covering Vitamin
Builds the collagen that keeps tendons strong under load. One catch: do not mega-dose vitamin C (or E) right around training, high doses can blunt the adaptations you trained for.
CitrusPeppersBerriesKiwi - 9Potassium K Worth covering Mineral
A key electrolyte for nerve and muscle signalling. (Cramps are mostly neuromuscular, not simply low electrolytes.)
BananaPotatoBeansAvocado - 10Iodine I Worth covering Mineral
Thyroid hormones govern how fast you burn energy all day.
Iodised saltSeaweedFishDairy - 11Vitamin A A Worth covering Vitamin
Supports immune function and recovery through hard training blocks.
LiverCarrotsSweet potatoEggs - 12Vitamin K2 K2 Worth covering Vitamin
Teams up with D3 to build strong, load-ready bones.
NattoCheeseEgg yolkButter
One honest aside: the single best-evidenced supplement for lifters is not a vitamin at all, it's creatine monohydrate (about 3 to 5 g a day). More proven for strength and size than anything in the list above.