So I'm on this weight loss journey too. I have to say one thing. Never in my life have I been more clearer of the role that nutrition plays than now. 4 years ago I lost weight and it was easy. Now my body is different. Age changes things.
I figured if I ate plenty of salads the weight would drop off. If I stayed away from meat, then I would be healthier... And I could not have been more wrong. Let me tell you what happened.
So I started back throwing in my intense cardio interval routines, about 4 times a week. My body eventually felt like it was falling apart. My energy was low. I was always tired. I was tired before, during, and after my workout. I lost ABSOLUTELY NO WEIGHT! I would wake up with anxiety in the middle of the night thinking I needed to call an ambulance due to a heart attack or something. I would feel shooting pains in my arms. OMG I thought my body was about to clunk out on me. And I thought was doing everything right. But I wasn't. It was totally my diet. I never fully understood nutrition. And it was slowly dragging me down.
I don't know what led me to do a search on protein deficiency but I did. And the site I fell on describes ALL of the symptoms I was having was due to not eating enough protein. So immediately I started looking for ways to turn it around. I love me some of me and I'd like to be sure I treat my body right. The first thing I found was whey protein. It's a by product of yogurt but doesn't contain much lactose. It was an easy change. I drink it in my smoothies. I've actually reduced the amount of fruit I put in there to half since it gets me full quicker. I am definitely a work in progress and the results I'm getting are absolutely amazing... I'm so awed at what proper nutrition will do for you.