When will people notice?

As others have said, it entirely depends on how much you have to lose. If you have a lot to lose to begin with, it will take time for people to start noticing physical changes. Stay the course!

Conversely, people don't seem to notice the loss when you are starting to reach the END of your weight loss journey:

I have lost 32lbs. I am not THAT big, and in the first few months, people were complimenting me all the time! It was great! But since New Years Day, I have lost about 10lbs and no one has said ANYTHING! My mum mentioned my weight loss a couple of weeks ago, but I was wearing what I call my 'guaranteed to get a compliment' outfit. Its just jeans that really flatter my legs and a top that covers my flabby arms but makes my waist look super thin.

People will start noticing soon. The important thing is that YOU notice. It might not always show on the scales, but when you slip easily into a pair of trousers that you might have had to struggle with a few months ago, or they don't fit you at all, you'll know what you're doing is working!

People may notice a change but may not want to say anything yet because weight is such a sensitive topic for most people.

This. Weight is a really touchy subject, especially among loved ones, so it can be hard for other people to say anything.

I've lost 21 pounds and feel it's a pretty big difference, but no comments yet. It can be very frustrating. Yes, we're doing this for ourselves but yes, we are also human. It's natural and normal to want recognition for our efforts.

No one seems to notice for me either. I'm not letting it get to me too much. Most people who are around me don't know I'm trying. My husband does and is being very supportive. My MIL does, but doesn't seem to think it is important (not in a mean way, she is 92 and a little senile I think she sees me the same way she did when I was 20 something). Two workout buddies know and my ex Daughter-in-law. Everyone else doesn't. I kind of think since most everyone I know have lived through me losing and gaining this first 40 that will be coming off so many times, they don't want to bring it up if they have noticed. Also, although I have noticed some shirts aren't as tight as they were, I really haven't noticed visibly myself. So I'm not going to hold my friends to a higher standard of observation :-).

I'm not going to go to the jealousy thought, or mean thought. I'm going to the place in my head that says they love me and support me at any size that I am. The weight loss is for me. When they see me happy that will be for them to comment on.

People have a tendency not to say much til it's a significant loss. I've now lost 140ish and people really started saying stuff around 60-80lbs down. Once I hit those numbers people were like...woah dude...