Poison dart frogs derive their toxicity from eating poisonous ants and termites in the wild. A captive-bred dart frog is essentially harmless, as its diet does not include any poisonous prey. – WTF Fun Facts
WTF Fun Fact – Poison Dart Frogs Diet

Poison dart frogs derive their toxicity from eating poisonous ants and termites in the wild. A captive-bred dart frog is essentially harmless, as its diet does not include any poisonous prey. – WTF Fun Facts
I always wondered how some people would hold them as pets.