Eating too much may lead to iron poisoning, which can be fatal, but you’d need to eat a good amount. Also iron binds to many other vitamins, meaning that if you take a multivitamin tablet or eat some other nutritious food with/close to the same time as it (~1-2 hours between meals) you may not be getting the nutrients you’d expect.
If you’re biologically female, your iron requirements will be more, so it’s not a bad idea to eat it if you like it. Iron rich foods such as blood are better absorbed if you drink some citrus juice along with it like lemonade or orange juice. As with everything, moderation is key.
Fun facts about iron/blood in food:
Your poo might be black/dark and sticky (referred to as “tarry” in the medical field) after eating iron rich foods, but that’s pretty normal. If you experience sticky, tarry stool when not eating iron rich foods, it may indicate internal bleeding and you’ll want to go to a hospital, especially if you took an NSAID such as aspirin or ibuprofen recently.
In China and I think a few other countries, “lucky iron fish” became a thing. It was simply an iron ingot in the shape of a fish that people would put into the rice cooker as it was making rice. The amount of ingestible iron it gave was scant, if any, and it was more of a novelty than anything else, not that people knew that at the time.
Finally, in Russia blood used to be incorporated into chewy chocolate candy bars in order to entice children to get their vitamins in. I’ve heard that it was actually quite good, and that the metallic tang is something a lot of kids who’ve tried it remember fondly. In some places it is still available.
Enjoy that black pudding! :)
Are there nutrients in blood that don’t have a better source? Seems like an amalgamation of low-cost, high-calorie food materials. Which is healthy if you would otherwise be starving, but when you have a variety of food sources available it’s not really a wise choice for long term sustenance.