Unfortunately, No !

At least according to an Australian study published earlier this year.

Previously some studies suggested a benefit for Vitamin D supplements in older people.

In 2014, a Cochrane review suggested
that vitamin D, supplements might
reduce risk of death in older people. The esteemed Cochrane review recommended further studies.

A randomised controlled trial of oral vitamin D, supplementation for five years in Australians aged 60 or older reports no benefits. Among 20 000 participants followed for five years, the
primary outcome–death from any cause.
occurred as frequently in those taking
the active supplement as it did in those
taking placebo.

References

Vitamin D supplements . . . and other stories
BMJ 2022; 376 doi: https://doi.org/10.1136/bmj.o452 (Published 03 March 2022)
Cite this as: BMJ 2022;376:o452

Cochrane review Vitamin D supplementation for prevention of mortality in adults. (Cochrane Database Syst Rev doi:10.1002/14651858. CD007470.pub3).

The D-Health Trial: a randomised controlled trial of the effect of vitamin D on mortality.
Rachel E Neale et al. Lancet Diabetes Endocrinol. 2022 Feb. Lancet Diabetes Endocrinol
doi:10.1016/S2213-8587(21)00345-4

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