In our quest to find natural ways to help Nick, we came across this:

It is basically vitamins. Click here for the link. For those who do not know, ASD stands for Autism Spectrum Disorder. I don't know if it will help him or not, but it is worth a try. The paragraphs below summarize the product.
Many children with Autism Spectrum Disorders (ASD) have multiple vitamin and mineral deficiencies. Our ASD Vitamin/Mineral Powder is specifically formulated to help counteract these deficiencies.
Several other companies also offer vitamin and mineral supplements. However, these supplements have many disadvantages. Some of these supplements are sold in a liquid dosage form. The problem with liquid supplements is that many vitamins and minerals are not stable in a liquid for more than a couple of hours or days. As a consequence, the patient may not receive the correct therapeutic levels from a liquid supplement. Also, to keep costs down, most supplements are made from inexpensive forms of the vitamins and minerals. In many people, these inexpensive forms are poorly absorbed and some can encourage yeast overgrowth.
Another problem is that many supplements are designed for the general population. These supplements do not fully meet the unique nutritional needs of a patient with Autism Spectrum Disorder. Lastly, and perhaps most importantly, none of the supplements we have tried taste very good. As most every parent of a child with ASD knows, it is not easy to get a child to take a bad tasting supplement. When we set out to formulate our ASD Vitamin/Mineral PowderT, we made sure to avoid all of these common problems.
Because Lee Silsby's ASD Vitamin/Mineral PowderT is added to a liquid immediately before serving, the vitamins and minerals have no chance to degrade. In addition, we use only the best forms of the vitamins and minerals available, and our formulation was designed in conjunction with several DAN! practitioners specifically to meet the needs of the ASD patient.
Lastly, through more than a decade of flavoring children's medications, we have developed the ability to make almost any medication palatable. Our expertise in flavoring medications insures that our ASD Vitamin/Mineral PowderT tastes great. It is available in citrus flavor or unflavored to meet the requirements of the Specific Carbohydrate Diet. Our formulation is free of gluten, casein, soy, sugar, artificial flavors, artificial dyes, and preservatives.
Each dose of ASD Vitamin/Mineral Powder™ contains:Click here to hide ingredients...
Chromium (as Chromium Aspartate) 200mcg elemental Chromium
Selenium (as L-selenomethionine) 200mcg elemental Selenium
Molybdenum (as Molybdenum Glycinate) 150mcg elemental Molybdenum
Zinc (as Zinc Amino Acid Chelate) 30mg elemental Zinc
Magnesium (as Magnesium Glycinate) 100mg elemental Magnesium
Calcium (as Calcium Citrate) 420mg elemental Calcium
Vitamin B-1 (as Thiamine HCl) 10mg
Vitamin B-2 (as Riboflavin-5-Phosphate) 15mg
Niacin (as Niacinamide) 40mg
Vitamin B-6 (as Pyridoxal-5-Phosphate) 25mg
Biotin 150mcg
Pantothenic Acid (as Calcium Pantothenate) 100mg
Folinic Acid 800mcg
Vitamin A (as Vitamin A Acetate) 5000 IU
Vitamin C (as Sodium Ascorbate) 500mg
Vitamin D 200 IU
Vitamin E (as Vitamin E Succinate, natural) 200 IU
We got a call from the psychologist today, and we have an appt. set up for Friday at 9am. We got his stool sample results. Everything was normal.