19 Jan 2023 --- A labeling analysis of 199 commercially sold multivitamins on Amazon in western and southern Europe revealed that the majority contained vitamin D3 levels that were either too low or too high, while no supplement contained vitamin D2. Additionally, a Slovenian-based study found that 95% of resveratrol supplements sold online had inaccurate labels. The two studies highlight that supplements sold online are difficult to regulate, and most lack correct labeling.
