Whoa! We could all see Jaden Smith was skinny, but we didn't know it was an actual medical problem that caused his family to stage an intervention!

On mom Jada's Red Table Talk, the family discusses a rough time young rapper/actor Jaden went through with his attempt at veganism ... which led him to a dramatic weight loss and "dark circles under his eyes." "Will and I had a bit of an intervention with Jaden because he’s a vegan now, but we realized he wasn’t getting enough protein," Jada explained. "He was wasting away. He just looked drained. He was just depleted. He wasn’t getting the nutrients ... There was even grayness to his skin,” dad Will Smith said. “We got really nervous."

"I also just wanna say that I’m vegetarian. I’ve tried to be vegan,” Jaden clarified. “I’ll go vegan for a week or so, but for the past year, I’ve been vegetarian ... I was just eating, like, two meals a day … maybe one. Maybe just that one big meal, and I’m like, ‘Oh, you know, I didn’t get around to it."

Because Facebook hasn't figured out how to let fans embed video, I'll give you the link to RTT here, in case you wanna see the episode for yourself ...