Information is physical. And mental health is a condition of information.
When your computer does anything, its physical state changes: some electric current in a transistor, or magnetization on a hard drive. There aren't really any ones and zeroes in a computer, just charges and not-charges. We label charge as ones, and not-charge as zeroes. But any change to the charges is physical.
How many theories of where the mind comes from are there? One thing we know for sure though, the mind is dependent on the brain. Physical changes to the brain result in changes to the mind: oxygen, glucose, electrolytes, injury.
Depression runs in my family. Some people have high blood pressure or bum knees, we have depression. I don't see any shame in this anymore; it's a condition I have to take care of physically.
All brains have the capacity for depression. The brains that have a tendency towards it require physical maintenance: quality sleep and nutrition. Exercise. Minimal use of any mind-altering substance, especially the legal and socially acceptable ones. Lots of water.
The magic of information is that it can change at the speed of light. Years ago I decided to change my mind about my mental health, to approach it without stigma. It took years to get to where I could. But now when I talk about it, you can use that information.
The better I take care of my brain, the less I have to work on my mind. Now that's mind over matter.