Some 23% of parents of teenagers said caffeine is a regular part of their child’s life, according to a nationally representative poll on children’s health.

Nearly 1,100 parents with children ages 13 through 18 took part in the C.S. Mott Children’s Hospital National Poll on Children’s Health. They said their children’s most common caffeine sources were soda, tea, coffee and energy drinks.

The parents reported that their teens most frequently consumed caffeine at home (81%) followed by dining out (43%).

Consumption differed by age group. More parents of 16- to 18-year-olds than 13- to 15-year-olds reported daily caffeine consumption: 14% vs. 6%. And the parents who said their children drank caffeinated beverages zero to three days a week (74%) attributed that to not usually having caffeinated drinks at home or their teen trying to be healthy or not wanting their sleep disrupted.

Two-thirds of parents said they believe they know whether their child is consuming too much caffeine.

Experts suggest a limit of 100 milligrams per day, or less, for teens, which is about the amount of caffeine in one eight-ounce cup of coffee or a little over two 12-ounce soft drinks. One in 3 parents in the poll thought the limit was higher than that.

Some influencers say if you avoid consuming caffeine for 90 to 120 minutes after waking up, you will perk up more naturally, thwart the dreaded afternoon slump and have better sleep. (Joyce Lee/The New York Times) XNYT0977 XNYT0977
Should you delay your morning caffeine? Influencers say so

Caffeine is a stimulant that can help with alertness, focus and energy. However, long-term use, especially among teenagers, can cause problems. “Excessive caffeine consumption in teens can affect their mood, sleep and school performance, along with side effects like headache, upset stomach or heart palpitations,” according to a C.S. Mott Children’s Hospital news release.

It is also possible for teens to become dependent on caffeine. “Parents may enlist the teen’s healthcare provider in explaining the risks of caffeine and suggesting strategies to cut back,” the authors write. “In addition, parents can involve their teen in selecting non-caffeinated options to have at home.”