Why does Kaioken hurt Goku? - Quora

Why does Kaioken hurt Goku? - Quora

Does Goku get stronger after using Kaio-ken? Does it have the same effect as being beaten to near death? - Quora

Why Does The Kaioken HURT GOKU?

Could Goku use Kaioken without the strain in the afterlife? - Quora

Why does Kaioken hurt Goku? - Quora

Why did Goku never go Kaio-ken in Super Saiyan? - Quora

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Why did Dragon Ball Super reintroduce Kaioken with SSG's already established healing abilities? - Quora

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Is a Kaio-ken x20 actually 2 times his power? - Quora