Here are some Iâve found on the subject of art and art history. â 1  Art is not what you see, but what you make others seeâ -Edgar Degas. â 2 Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seenâ â Leonardo Da Vinci.
Other forms of vitamin B 3 include the corresponding amide and nicotinamide (niacinamide), where the carboxyl group has been replaced by a carboxamide group (CONH 2), as well as more complex amides and a variety of esters.
Niacin is toxic in too high a dose. Niacinamide isn't, and so that's usually used for mental health purposes, but it doesn't yield a lot of niacin. Niacin will also give you a hot flush on your skin, unless you buy a non-flush niacin, which is usually, again, niacinamide. Niacin is usually used for the heart.