"The Blind Side" star Quinton Aaron has been on an up-and-down battle with his weight, but right now he's up ... by being down 200 pounds.

Quinton tells TMZ, "At my heaviest, I was 575 pounds. As of today, I am 370 pounds."

What's even more incredible ... he did it all without Ozempic. Quinton says he tried the drug about a year ago because he's diabetic, but stopped after he had an allergic reaction.

So what's his secret? Quinton tells us ... "I have been doing intermittent fasting, and since my marriage, having a lot of cardio in the bedroom."

Can't be mad at that ... but bedroom cardio isn't the only way Quinton's bride, Margarita , has helped him with these monumental feats ... after the couple married in December 2024.

"Mentally, physically and emotionally, she has been my

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