Due to the UK's northern latitude, sunlight lacks the necessary UVB strength to synthesize Vitamin D naturally for over six months of the year. For men working indoors, depletion is a year-round reality.

We use pure Cholecalciferol (D3)—the exact bioidentical form your skin manufactures when exposed to real sunlight—dosed at a clean, reliable 1,000 IU baseline.

Vitamin D3 contributes to the maintenance of normal muscle function and the normal function of the immune system.

Vitamin K2 is virtually missing from the modern Western diet because it is found almost exclusively in niche fermented foods like Japanese Natto or specific aged cheeses.

We utilize premium MK-7. While standard Vitamin K1 clears from your body within hours, our MK-7 variant stays active in your bloodstream for up to 72 hours for continuous, around-the-clock nutrient management.

Vitamin K2 contributes to normal blood clotting and the maintenance of normal, healthy bones.

Modern intensive farming has progressively depleted soil mineral levels. Furthermore, adult men rapidly excrete magnesium during high work stress, heavy caffeine consumption, alcohol use, and physical sweating.

Standard multivitamins rely on cheap Magnesium Oxide, which has a dismal 4% absorption rate and irritates the gut. We use Magnesium Citrate, an organic salt form that is highly soluble, bioavailable, and exceptionally gentle on the stomach.

Magnesium contributes to a reduction of tiredness and fatigue and the normal functioning of the nervous system.

Zinc is the critical mineral anchor for male biological performance, but it is easily lost through intense exercise, daily stress, and routine lifestyle factors.

Mass-market multivitamins compress zinc alongside massive doses of calcium, causing them to fight for absorption and cancel each other out. Our isolated Zinc Citrate delivers an optimized 15mg active dose that absorbs cleanly.

Zinc contributes to the maintenance of normal testosterone levels in the blood and the protection of cells from oxidative stress.

The UK government recommends eating oily fish weekly, yet national surveys show the vast majority of men fall far short. Additionally, cheap fish oils oxidize quickly, turning rancid and causing unpleasant fish burps.

You cannot compress active liquid marine oils into a dry multivitamin tablet. We include a full 1,000mg pure softgel providing 180mg EPA and 120mg DHA, naturally shielded with 3.2mg of premium d-alpha tocopherol (Natural Vitamin E) to guarantee molecular freshness and zero digestive aftertaste.

EPA and DHA contribute to the normal function of the heart, while Vitamin E contributes to the protection of cells from oxidative stress.

B vitamins are entirely water-soluble. Your body cannot store a backup reserve; whatever you don't use today is flushed out. High stress and caffeine habits burn through these vital metabolic keys rapidly.

Many brands resort to extreme, synthetic megadoses (e.g., 5,000% NRV) that overload your kidneys and turn your urine neon yellow. Supplestack takes a balanced, intelligent approach—dosing near 100% NRV to safely and naturally fuel your metabolism.

Vitamins B6, B12, and Thiamine contribute to normal energy-yielding metabolism and normal psychological function.