They could do a better job of making this clearer, but Focus Excel is an 18+ product. If you want to try a supplement along with Synaptol though, I'd highly recommend Immuno Xcell.
This might seem like an odd choice on the surface, but as you probably know, there do seem to be links between autism and immune function, and Immuno Xcell in particular has DMG (Dimethylglycine, vitamin B15) at very reasonable price. Not sure if you've read anything about DMG for autism, but people's experiences with it are pretty amazing:
"In 1965, two Russian investigators, M. G. Blumena and T. L. Belyakova, published a report showing considerable improvement in the speech of 12 of a group of 15 mentally handicapped children who had not been able to use speech to communicate. The children had been treated with a substance variously known as calcium pangamate, or pangamic acid, or "vitamin B15." In addition to enriched vocabulary, the children began to use simple sentences, their general mental state improved, and there was better concentration and interest in toys and games. Subsequent research has shown the essential factor in calcium pangamate to be DMG. Soon afterward psychiatrist Allan Cott visited Moscow and brought back a small supply of pangamic acid, which he tried on a number of children in his practice, some of whom were autistic. Many of Cott's patients responded in the same way the Russian children had. One mother wrote, "It's the most exciting thing I've ever experienced. He was repeating words and he answers questions now!...I am now so firmly convinced that DMG is helpful to a substantial proportion of children with autism and adults that I have decided to "go public" in the Autism Research Review International -to tell people about it freely and openly, so they may try it if they wish."http://www.greatplainslaboratory.com/home/eng/book/ch11.asp
"We did notice a difference, Isy seemed to be calmer, eye contact improved, stimming decreased and her language seemed to improve. We noticed these changes gradually over a period of six months, however we were unsure if it was purely because of the DMG, as we were administering other Autism treatments such as ABA and DTT. We decided to stop administering the DMG to see if there was a noticeable difference – and there was. Mostly noticeable was the behaviour and eye contact, but we did definitely notice a set back in other areas." http://isybeeautism.com/autism-treatments/dmg-and-autism/
"As with melatonin, the benefits of DMG were almost immediate. Within three days of diagnosis, I spoke with Bernie Rimland, Ph.D., a gifted clinical psychologist who specializes in the nutritional treatment of learning disorders. Based on his recommendations, I gave DMG to Eli. Three days later my wife and I ordered some takeout at a fast food drive-through. After giving our orders a small, sweet voice from the back seat suddenly piped up, ‘Kids meal, cheeseburger, ice-water.’ The hair stood up on my arms, and barely moving, I glanced sideways at my wife to see that she, too, was struggling to hold back the tears. Not only was this a breakthrough in language, but it was also the first time our son ate any food other than his limited repertoire. From that day forward, cheeseburgers, fries and ice-water became not only a source of food for our son, but also an important part of his road to recovery. Whatever works." http://nutritionreview.org/2013/04/saving-eli-one-familys-with-struggle-autism/
Cool, right? :) If you're interested in learning more about DMG, particularly for autism, I'd recommend reading Building Wellness with DMG. http://www.amazon.com/Building-Wellness-DMG-Breakthrough-Cardiovascular/dp/1893910318.
Hope this helps!