Does sugar make kids hyper? Maybe.

Axar.az reports that "if you look at the peer-reviewed evidence, we cannot say sugar absolutely makes kids hyper; however, you can't discount that sugar may have a slight effect" on behavior, said Kristi L. King, senior pediatric dietitian at Texas Children's Hospital and spokeswoman for the Academy of Nutrition and Dietetics.

In the mid-1990s, a meta-analysis reviewed 16 studies on sugar's effects in children. The research, published in the medical journal JAMA, concluded that sugar does not affect behavior or cognitive performance in children. "However, a small effect of sugar or effects on subsets of children cannot be ruled out," the article said.

Like adults, some children may be more sensitive to blood sugar spikes than others. This may mean they are more likely to become aroused when consuming sugar.

Notably, a small percentage of children with attention-deficit hyperactivity disorder may be extra sensitive to sugar, and their behavior changes when they eat it, according to Jill Castle, a registered dietitian and childhood nutrition expert who teaches a parenting course called the ADHD Diet for Kids. "They may become more aggressive or hyperactive or difficult to parent," Castle explained. Minimizing sugar in the diet can be beneficial for these children.

According to Castle, lots of sugary foods can also equate to elevated amounts of food dyes, artificial flavors or other additives that could be problematic for a child with ADHD, often making it difficult to tease out whether sugar is the culprit.

Complicating the issue is the fact that we don't have a way to determine whether there is a link. "Is there a biomarker? A hormone level?" King asked. "It's disheartening for parents. ... They want answers. And unfortunately, nutrition is such an individual thing."

Sugar and hyperactivity: Positive link or parent perception?

The idea of a link between sugar and hyperactivity in children dates to the 1970s when the Feingold diet was prescribed by a pediatrician with the same name as an eating plan to alleviate symptoms of ADHD.

"His diet eliminated artificial flavorings, sweeteners, and preservatives -- and so sugar kind of got lumped in, as well," King said.

This diet may have led parents to perceive that sugar is a culprit when it comes to kids' excitable behavior -- even if it is not the true cause of one's hyperactivity.

In one study from the mid-'90s, researchers gave children a drink containing a sugar substitute. One group of moms was told that their kids were drinking a high-sugar drink; the other group was told the truth, that their kids were consuming a sugar substitute. Mothers who were told that their kids consumed sugar rated their kids as more hyperactive, even though they didn't consume any sugar.

"Just thinking their children were consuming sugar caused moms to perceive their children as being more hyperactive," King said.

"When children consume sugar, it's usually around something fun: holidays, birthdays, celebrations; there's already that excitement there," she said. "I don't think you can say the sugar made them run around and play with friends. ... That would be very hard to separate out."

Instead, a release of the hormone adrenaline might explain a child's overly energetic behavior. "It's a flight or flight hormone; when you are excited or fearful, it increases heart rate and directs blood flow to the muscles, which may make children more antsy and have the urge to keep moving, so you may be perceiving that as hyperactivity," King said.

To try to determine whether your child is truly sugar-sensitive or just excited about a celebration, Castle recommends eliminating sugary foods from the diet for a few weeks and then testing the child with a sugary food like soda, frosted cake or a tablespoon of sugar in 100% juice, and watching the child's response. "It may be a quick way to determine how sugar may be affecting the child," Castle said.

Then again, like the parents in that study, you may just think they're being hyper just because you know that they consumed sugar.