Why does a carrot indicate 50-70% spo2? I saw this on a video, I rejected it as a fluke but I tried it on my 3-5 year old oximeter (pre covid one) and I got t

Why does a carrot indicate 50-70% spo2? I saw this on a video, I rejected it as a fluke but I tried it on my 3-5 year old oximeter (pre covid one) and I got the same results.