The title states no result or conclusion. The actual conclusion might discourage people who decided to supplement that it has no effect (and indeed it may not),

The title states no result or conclusion. The actual conclusion might discourage people who decided to supplement that it has no effect (and indeed it may not), but it doesnt comment on that either, merely stating: "Vitamin D3 supplementation does not confer therapeutic benefits among hospitalized patients with severe COVID-19" (emphasis mine).