This video explains that there doesn't appear to be any ties between iron deficiency and ADHD.
There are some symptoms that are similar, like tiredness, depression, lack of motivation. The reasoning behind them are very different but root back to the same source.
Iron deficiency comes from things like, poor diet in iron rich vegetables and meats and/or external/internal bleeding or an over acting menstrual cycle.
The loss of blood depletes the body of iron if it is not added back in at the same amounts.
Uncontrollable ADHD symptoms are mainly the result of a poor diet with to much sugar and not enough protein. Usually the diet is loaded with processed foods that have a lot of sugar, additives, artificial ingredients, and toxins.
The body can't handle this kind of diet and the uncontrollable symptoms are as a result.
The book mentioned in the video is a great resource on the proper diet, iron and iron deficiency, and many major health conditions.
The book is The Protein Power Lifeplan by Dr Michael Eades and Dr Mary Eades.