The Evidence

The research behind VitAseel

Peer-reviewed studies on Vitamin D3 and fatigue, immunity, and bone health.

BMJ — British Medical Journal
2017 · 25 RCTs · 11,321 participants
"Vitamin D supplementation significantly reduced the risk of acute respiratory tract infection."

One of the largest meta-analyses of its kind. Found that daily or weekly supplementation was most protective in those deficient at baseline — the exact population VitAseel targets.

Martineau AR et al. BMJ 2017;356:i6583 · PubMed →
Nutrients — MDPI Open Access
2020 · Peer-reviewed review
"Vitamin D deficiency is associated with fatigue, reduced muscle strength, and impaired physical performance in otherwise healthy adults."

Directly relevant to the primary complaint of VitAseel's target customer — persistent fatigue in healthy, active professionals with no other obvious cause.

Amrein K et al. Nutrients 2020;12(7):1988 · PubMed →
IJERPH — Int. Journal Env. Research
2021 · Saudi Arabia · Women aged 19–40
"Indoor working women in Saudi Arabia show significantly higher rates of Vitamin D deficiency, irrespective of seasonal variation."

Even in one of the world's sunniest countries, modern indoor lifestyle produces year-round deficiency. The geography changes. The problem doesn't.

Al-Musharaf S et al. IJERPH 2021;18(2):574 · PubMed →

VitAseel does not claim to diagnose, treat, cure or prevent any disease. The studies above are cited for educational purposes. All Vitamin D health claims comply with EU Regulation 432/2012 permitted claims.