B12 Supplement - Treatment For Autism

I’ve been giving my son a combination B12 and folic acid supplement for 8 days now. It’s not methyl b12 as I didn’t know the difference when I purchased it. I’d like to go ahead and use this up though. It contains 1,000 mcg of b12 and 400 mcg of folic acid per 1 ml. 1 ml is the dosage recommended on the bottle and our Pediatric Developmental specialist at Cincy Children’s agreed, although she’s the first to say that she’s not terribly familiar with supplements as treatment for autism. I’m wondering how much B12 is typical for our purposes. Myson is 2&1/2 years old & 28 pounds.