The B-6 and B-12 in a multi will be sorely inadequate except for a very few super/mega multis. Even they could use some supplementing. Most multis will have the RDA of B's, just enough to prevent malnutrition. B-12 should be the methyl version. 1000 mcgs would be a good start. A B-50 Complex will give a broad base of all the B's.

For those on low or no salt diets, be sure you are getting appropriate levels of iodine. It is added to most table salt because most diets tend to be deficient.

A broad based multi should have some.

Unless there is an issue with high blood pressure, moderate use of salt is not bad. Many live long healthy lives with a salt shake used liberally at most meals. My father was one.

There are plenty of frozen vegetables that have high levels of nutrition and good flavor.

Not everyone has the opportunity to eat a fresh food only diet.

There are a few substances that can be problematic. Fermented soy or even excessive soy, artificial sweeteners, MSG ( a natural substance) and naturally occurring in some fruits and vegetables.
Deodorants that have an antipersirant effect often have aluminum, a neuro-toxin.

There are plenty of online resources for anti-inflammatory diets. They can be helpful.