Cinnamaldehyde, Cinnamon, & Niacin
This substance plays a role in the signaling pathway that is connected to rosacea being activated. As a result, cinnamaldehyde-containing meals may make rosacea symptoms worse.
Since cinnamon contains significant amounts of cinnamaldehyde, it is frequently mentioned as a dietary trigger by rosacea sufferers. A flare-up may be prevented by avoiding cinnamon and foods containing cinnamon, such as many cereal items and baked goods.
Niacin is more popularly known as vitamin B3 [4], and it is a recognized cause of the rosacea-related stinging and flushing of the face.
Niacin-rich foods include mushrooms and potatoes.