Question about iodine

[Justiina]

If next statement is true, (why wouldn't it be?), how taking iodine will replace other halogens ?

"Fluoride and iodine are both halogens. Fluoride, the negative ion of the element fluorine, easily displaces iodine in the body because it is much lighter and therefore more reactive. In fact, the activity of any one of the halogens (Iodine 126.70, Bromine 79.90, Chlorine 35.45, Fluorine 18.99 are the most common) is inversely proportional to its atomic weight. In other words, one halogen can displace another one of a higher atomic weight but cannot displace one of lower weight."

Or do you have to flood your system by ridiculous amount of iodine or is it something else that starts the process of other halogens pushing out?

I am not planning on having a party drinking tons loads of iodine I am just trying to understand all this.

[diogenes Remembering]

A bit of chemistry. In the body, the halogens (except iodine bound as thyroxine or T3) exist almost entirely as electrically charged ions. All of them from fluoride to iodide can be represented as F-, Cl- etc - that is the atoms have one electric negative charge. They attract but do not bind to positively charged ions like sodium (Na+). There is no displacement as such, merely a loose interchanging attraction dance between the negative ions and positive ones.One halogen can only be displaced by a higher concentration of another. The atomic weights don't come into it. So e.g. high iodide can displace low fluoride and vice versa. Same with all other pairs.

[Justiina in reply to diogenes]

Thanks! You read a little bit here and then little bit there and end up having no clue.