Mineral Health Connection
Bromine is not very commonly spoken about when it comes to nutritional sciences, and few are aware of its relevance in brain health. Bromine is an essential trace element that is required for the structure and physiology of our bodies.
Of the 92 naturally-occurring chemical elements, bromine has recently become the 28th element that is considered essential for tissue development in all animals, including everything from primitive sea creatures to human beings. As Vanderbilt Professor of Medicine, Billy Hudson once stated "Without Bromine, there are no animals. 
In Minerals for the Genetic Code, Dr Olree suggests that bromine is found in trace amounts all throughout the body and is paired with the amino acid serine. He also states that bromine deficiency causes Parkinson's disease. Suggesting that bromine shares a relation with boron through serine, and when boron levels are low and aluminium levels are high, metabolic pathways that involve serine are disrupted, and thus, bromine metabolism fails causing deficits to rapidly occur .
Bromine is an essential cofactor for peroxidasin-catalyzed formation of sulfilimine crosslinks, a posttranslational modification that is essential for tissue development and architecture found within the collagen IV scaffold of basement membranes . As a halogen, bromine is related to iodine, fluorine, and chlorine.
Bromine is commonly found in many vegetables (see below) and during food processing such as bromated or "bleached flour". It is also found in citrus flavoured soft drinks such as Gatorade, Mountain Dew, Sprite and has been used by the soft drink industry since the 1930s. 
According to Dr Wilson, one of my nutritional balancing mentors, "Bromine is a deadly mineral that mainly replaces iodine in the body. By so doing, it causes thyroid damage, a pervasive problem in America and around the world. A major symptom of bromine toxicity is fatigue and hypothyroidism." 
Originally discovered independently by two different chemists, Carl Jacob Lowig (1825) and Antoine Balard (1926). Balard isolated bromine from the ash of seaweed. The seaweed was originally used to obtain iodine, unknowingly at the time, that seaweed also contained bromine. Lowig, however, isolated bromine from the water of a mineral spring. 
Bromine compounds have been used throughout history as a sedative, such as potassium bromide in the 19th and 20th centuries (still used to this day). The Food and Drug Administration (FDA) removed these over the counter substances such as Bromo-Seltzer from public sale in 1975. Toxic reactions from an overdose of bromine resembles acne-like skin eruptions.
Foods that contain a significant amount of bromine include:
Cruciferous vegetables like broccoli, cauliflower, Brussels sprouts and turnips
Fermented soybean foods including miso, tempeh and yellow soybean paste
Other foods, including peaches, strawberries, pears, peanuts, radishes, spinach, pine nuts, sweet potatoes, bamboo shoots and millet, bladderwrack, kelp, bell pepper, cherry pepper, cone pepper, green pepper, paprika, sweet pepper, Stinging Nettles, Brazil Nuts, Japanese knotweed and dandelion. 
Mineral waters may contain various amounts of bromine.
Tremors of the tongue and eyelids
Cyanosis (skin blueness)
Heart beat malfunction
Other possible side effects I found listed in other sources also includes multiple organ system damage, birth defects, growth problems, memory loss and fatigue 
 Walters, Charles. Minerals for the Genetic Code: An Exposition & Analysis of the Dr. Olree Standard Genetic Periodic Chart & the Physical, Chemical & Biological Connection (p. 114). Acres U.S.A.. Kindle Edition.
 What is it? Wednesday: Bromated and Bleached Flour: https://www.bobsredmill.com/blog/featured-articles/wiw-bromated-bleached-flour/
 THE FACTS ABOUT YOUR FAVORITE BEVERAGES - http://www.pepsicobeveragefacts.com/home/ingredientglossary#B
 DEADLY BROMINE FOUND IN POOLS, HOT TUBS, CITRUS-FLAVORED SOFT DRINKS, JUICES, AND IN SOME BREAD -http://drlwilson.com/articles/BROMINE.htm
 The dirty dozen – 12 foods/food additives to avoid and why - https://fooddemocracy.wordpress.com/2008/01/18/the-dirty-dozen-12-foodsfood-additives-to-avoid-and-why/
 Food Labels - http://www.healthyeatingadvisor.com/food-labels.html