Health officials in the Land Down Under are cracking down on a popular supplement.

Australia’s Therapeutic Goods Administration (TGA) announced this week that it will roll out new sales restrictions and labeling rules for vitamin B6 products, warning that prolonged high doses can cause potentially dangerous side effects.

“You can have too much of a good thing,” Dr. Oliver Jones , a chemistry professor at RMIT University in Melbourne, who was not involved in the new policy, said in a statement . “The dose makes the benefit as well as the poison.”

Vitamin B6 is an essential nutrient that helps with more than 140 functions in the body, including brain development, immune support and the metabolism of proteins, fats and carbs.

We can’t make it ourselves, but health experts say that

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