Yes, and if you take them out, process them and place them into food that is made up of components you can easily end up with a combination that is harmful for health despite all the "components" being technically natural and even maybe necessary for human body to function.
Why is that so difficult to understand?
Less processing = better. The end.
Also, as to your list?
1) First thing is Vitamin A. Which is absolutely necessary for the body... yet Vitamin A that is used to reinforce processed food is
outright toxic. You see, not only is it present in excessive quantities, but synthetic vitamin A itself is
far more likely to poison you than the natural Vitamin A. And because it is typically derived from plant-based vitamin A, you need far more of it since it is far less bioavailable than animal vitamin A. Oh, and plant vitamin A can block thyroid function and cause obesity. Fun stuff.
2) Second is Vitamin D3, or specifically, industrially-produced variant of D3. It is again far more likely to cause toxicity than the natural D3 which body is better able to tolerate and process. Excess causes hypercalcemia, which can lead to damage to bones and liver.
3) Phytonadione is artificial vitamin K, specifically its plant based variant (K1). Because of this, human body is not really able to properly process it. Compared to the animal K2, vitamin K1 is absorbed less efficiently and excreted more quickly. And again, using supplements runs a significant risk of overdose, which can lead to kidney disease and liver damage.
4) Niacinamide is B3, and taking too much of it may lead to cardiovascular disease and liver toxicity.
5) Cyanocobalamin is artificial B12, which again is absorbed less readily than natural B12. And unlike natural B12 (Methylcobalamin), it contains cyanide and can damage mitochondria. Side effects are vomiting, stomach problems, potassium deficiency, headache, fever and diziness.
Human body is designed to process whole foods, not their component parts. You may look at vitamins in isolation, but there are so many factors which affect absorption and utilization of any given chemical that such approach is worse than useless - it is in fact dangerous. For example, vitamin C absorption is blocked by sugar and carbohydrates in general, which means that a person on vegan diet
even when supplemented still runs a risk of vitamin C deficiency, despite theoretically having far more vitamin C available than say equivalent carnivore diet. Not to mention that
in addition to these problems, basically all processed foods also include various chemicals which are outright toxic for human organism. Do you know what erythritol and soy lecithin do to human body? What about maltitol?
"Oh, yes, so
some of the stuff I don't know on the label is not akschually bad, so it is
perfectly fine to load myself with stuff I have no clue about in combinations that were never meant to exist and whose effects I do not know. There is
absolutely no way anything can go wrong!"
You are literally a case study in why little knowledge is worse than no knowledge.