How Will Minor (~10 Lbs) Weight Fluxuation Effect my Breast Reduction Results?

If your weight was 135 when you had your reduction and now you are 143 lbs, the 8 lb wt loss to get to your pre operative weight will likely not adversely affect your result.  However, I would caution you against allowing your weight to "yo-yo" by 10 lbs on a repeated basis as i believe this is very hard on your skin and stretches it out.

So, at your young age, a one time wt loss back to your pre op weight should be fine on your breasts, but repeated Yo-yoing of your weight may cause them to ultimately stretch out and droop.

Weight fluctuation of about ten pounds should not have much effect on the breast size.  However, if you are only two months post surgery, you can almost certainly expect the size of  your breasts to go down a bit.  Breast reductions usually have a fair amount of swelling even at two months and you can expect the final size to be a bit smaller than what it is now.

Small amounts of weight loss are unlikely to significantly affect your post reduction breast shape.  The health and physical benefits from your weight loss are more beneficial than any negative effects it may have on your breasts. All the best.