Vitamin-D-Status weltweit: Review von 2014

Diese Metaanalyse zu „Vitamin-D-Status weltweit: Review von 2014“ bündelt Originalarbeiten und ordnet deren Aussagekraft sowie Grenzen ein.

Welche Frage wurde untersucht?

Die Arbeit „A systematic review of vitamin D status in populations worldwide“ prüft, wie Vitamin-D-Status oder Supplementierung mit dem im Titel bezeichneten Endpunkt zusammenhängen. Entscheidend ist die Ebene der Evidenz: Hier wird nicht eine einzelne Beobachtung, sondern eine systematisch zusammengeführte Studienlage betrachtet.

Wie wurde die Evidenz zusammengeführt?

Die Arbeit führt Ergebnisse mehrerer Studien zusammen. Die Quellenliste dokumentiert die zugeordneten Originalarbeiten. Die Zusammenführung erhöht die Datenbasis, beseitigt aber Unterschiede bei Population, Ausgangsstatus, Vergleich, Dosisregime und Endpunktdefinition nicht.

Was zeigt der Gesamtbefund?

Der Review zeigte starke Unterschiede der 25(OH)D-Werte zwischen Studien und Regionen; Neugeborene und institutionalisierte ältere Menschen erschienen in mehreren Regionen häufiger niedrig versorgt.

Der Befund beschreibt genau den untersuchten Vergleich. Er darf nicht als allgemeines Wirkversprechen für Vitamin D oder als Empfehlung für eine bestimmte Einnahmemenge gelesen werden.

Wie belastbar ist das Ergebnis?

Die erhebliche Heterogenität verhinderte eine einfache globale Gesamtaussage zum Vitamin-D-Status. Metaanalysen übernehmen zudem die Grenzen ihrer eingeschlossenen Studien. Heterogenität, Bias und unterschiedliche Messweisen können einen gepoolten Wert beeinflussen.

Einordnung für Supplement Stack

Der Artikel dokumentiert die gemeinsam ausgewertete Studienlage samt Originalquellen. Die stoffweite Einordnung zu Versorgung, Referenzwerten und Sicherheit steht im Vitamin D: Warum Sonne, Knochen und Calcium zusammengehören.

Fazit

Der Review zeigte starke Unterschiede der 25(OH)D-Werte zwischen Studien und Regionen; Neugeborene und institutionalisierte ältere Menschen erschienen in mehreren Regionen häufiger niedrig versorgt. Für die praktische Einordnung bleibt die genannte Grenze wesentlich: Die erhebliche Heterogenität verhinderte eine einfache globale Gesamtaussage zum Vitamin-D-Status.

Quellen

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