Hair loss when on a diet

[GaelicTruecel]

I have thinning hair at the top, you can see my scalp when I take a photo from the top.
I am trying to figure out if this is just from age or if my calorie deficit is causing it.
I have lost over 25lbs over the past three months and it says on google that hair loss can occur when you are on a calorie deficit. On average I probably am on a 500-700 deficit.
I won't know for sure until I lose the weight and increase my calories and see if my hair improves.

 

[TheDragon]

Are guys in your family losing hair? If so, it's probably genetic. If not, then it's probably diet or other lifestyle factors.