u/BadBrowzBhaby — reddlx

Obligatory NAD and this is not medical advice.

I started D supplementation in 2021. My levels were normal but I was looking to achieve “optimum” levels. Within several months I developed rosacea type 1 with severe facial flushing. In my research I found a link between vitamin D supplements and rosacea, so I discontinued it and started Finacea. My skin was literally been almost perfect until late 2025.

In the interim I had a baby and developed typical mom amnesia. I forgot about my experience with vitamin D, give my kid a supplement and thought hey I’ll put this in my morning coffee and boost my normal levels to “better” and within a few months I had developed type 2 rosacea (diagnosed by a derm). Grrrr. I totally forgot about the connection between supplementation and rosacea, remembered it about a month ago, discontinued use and my skin started improving within a week. Almost all traces of it are gone, I stopped using my compounded Rx, and my skin is stable and back to its old self.

There is evidence that for some reason supplementation triggers rosacea in some individuals. This is not my opinion. Sadly I appear to be one of those people and I am also someone who develops cystic acne from B12 supplements (especially cyanocobalamin - estimated from one study to be up to 10% of people with this issue).

Just wanted to spread the word as my derm was unaware of this and I had to find out the hard way / on my own.