# Vitamin D supplement

5 Hacker News commenters recommended Vitamin D supplement and 3 criticized it, November 2025 to November 2026. It was recommended in 3 of 13 months; owners who said how long report a median of 1 years (4 owners).

**Verdict:** People recommend taking a daily vitamin D supplement because it is cheap and seems to improve mood, energy and illness recovery, with few known risks. Some report it made their symptoms worse or did nothing for them.

## Why people recommend it

- Improves mood and energy (3 comments): "Vitamin D makes me not feel like crap, it's cheap, and effectively zero risk." ([source](https://news.ycombinator.com/item?id=48659216)) "my mood and energy sure improved. Also I feel like I get sick less often." ([source](https://news.ycombinator.com/item?id=48656300)) "when I started taking it, I felt a lot better" ([source](https://news.ycombinator.com/item?id=46812189))
- Cheap and low risk (2 comments): "Vitamin D makes me not feel like crap, it's cheap, and effectively zero risk." ([source](https://news.ycombinator.com/item?id=48659216)) "I take a daily supplement, it's cheap insurance." ([source](https://news.ycombinator.com/item?id=50305840))
- Milder colds, fewer illnesses (2 comments): "my mood and energy sure improved. Also I feel like I get sick less often." ([source](https://news.ycombinator.com/item?id=48656300)) "my cold last 2-3 days and symptoms are much more mild" ([source](https://news.ycombinator.com/item?id=48657270))

## What people warn about

- Did not help some people (1 comments): "I think they didn't help me a bit." ([source](https://news.ycombinator.com/item?id=46844974))
- Possibly worsened symptoms for some (1 comments): "in my case I think it might make it worse" ([source](https://news.ycombinator.com/item?id=49237257))

## Alternatives hackers recommend

- [Creatine monohydrate](https://hackerapproved.com/p/creatine.md): 104 recommend
- [Melatonin](https://hackerapproved.com/p/melatonin.md): 43 recommend
- [Magnesium glycinate](https://hackerapproved.com/p/magnesium-glycinate.md): 31 recommend
- [N-acetylcysteine (NAC) supplement](https://hackerapproved.com/p/n-acetylcysteine.md): 17 recommend
- [Psyllium husk](https://hackerapproved.com/p/psyllium-husk.md): 13 recommend

## Cite as

Hacker Approved, "Vitamin D supplement", https://hackerapproved.com/p/vitamin-d-supplement/ (counts from 1,795,640 Hacker News comments, November 2025 to November 2026).