Are natural remedies for learning disabilities in child safe?

Do Not Work. Most are not tested for safety, so there may be some danger. More importantly, not one has been shown to have any benefit. Do not waste your money.
Generally yes. Most natural supplements are food-based, but as important as giving a supplement a child may be deficient in, is removing all the toxins a child is exposed to. Don't let your child eat off the children's menu (fatty, high in carbs, high dairy and wheat content), don't let your child drink sodas, eat high fructose corn syrup, and do make sure that they are outside in nature on a regular basis.