Sport und Alter (Teil 3): Richtig essen und öfter in die Sonne
Vitamin D: Sonnige Aussichten
Das Sonnenvitamin D3 - Central-Apotheke, Leipzig
COVID-19 was 19X more likely if low vitamin D (may be invalid data)– April 2020 | VitaminDWiki
Epidemischer Vitamin-D-Mangel bei Patienten einer geriatrischen Rehabilitationsklinik
COVID-19 mortality risk correlates inversely with vitamin D3 status, and a mortality rate close to zero could theoretically be achieved at 50 ng/ml 25(OH)D3: Results of a systematic review and meta-analysis