"Neurological conditions eg. multiple sclerosis, motor neurone disease,epilepsy, memory loss.

--Associated with Gluten

Diagnosis of Gluten intolerance in elderly patients is disproportionately high. This is because it is misdiagnosed and under-diagnosed by doctors.  Some Gluten intolerance is identified in children. 
But for others, it is not until much later in life that Gluten intolerance is actually suspected. 

Frequently it is triggered by some life event like divorce, job loss or serious illness.

The symptoms of both Non-Celiac Gluten Sensitivity (NCGS) and Celiac Disease (CD) become worse with age if left undiagnosed.

Many people suffer from headaches, mouth ulcers, weight gain or weight loss, poor immunity to disease, and skin problems like dermatitis and eczema.

But the common and well-known Gluten intolerance symptoms are gastro-intestinal (diarrhoea, flatulence, bloating etc.)

However sufferers improve dramatically within weeks on a Gluten-free diet.

After a few weeks on a gluten-free diet, newly diagnosed Gluten sensitive people find they are free of a raft of other symptoms as well which for years had compromised their lifestyle: flatulence, abdominal cramps, tiredness and their tendency to catch ‘bugs’ and viruses easily.

It is surprising how quickly the small intestine actually heals. Soon you will begin to absorb nutrients from food more effectively. The digestive tract gets back to doing its job normally and you will start feeling well again."  

information taken from:  http://www.foodintol.com/celiac.asp