Ameline - With that info, I think it's even more likely that you're low in iron. Definitely get it tested before taking supplements though bc as you probably know too much iron is dangerous. The amount in a multivitamin is probably small enough though that you'd be safe taking it but, still, a test would be best in both cases.
Yep to tea hurting and Vitamin C helping. Dairy also impairs absorption. I was a vegetarian too for a few years! I remember vegetarian lit talking about how much iron is in plant based foods, but the truth is heme iron (the kind in animal products) is absorbed massively better than non-heme iron. I don't remember vegetarian lit stressing that enough. I've been tracking my food on MFP the past 10 days. Even as a meat eater now, I didn't come close to the recommended amount of iron on even a single day. It can be hard to get it from diet alone, especially when eating low calorie. Also, if you're deficient you need vastly more than what you can get through diet to raise your iron stores.
A friend of mine is a nurse, and a doctor colleague of hers is on a mission against iron deficiency. He said it's so common among women, yet is not looked for and treated enough. I know that was the case for me. I'm disappointed that none of my doctors tested my iron after seeing low hemoglobin levels until it got debilitatingly bad. I've had fatigue issues since I was a teenager -- usually not severe, but lower energy than my peers and family - and I believe now iron deficiency greatly contributed.
I think it's worth noting that individuals seem to have their own set point where they feel well regarding their hemoglobin and iron levels. So, even at the same numbers, one person may feel a little tired or fine, and the other is exhausted, weak after little effort, and feels like they're not getting enough air. It's important to pay attention to what our bodies are telling us.
Anemia can be an insidious disorder though because we get used to its negative impact on us and adapt to our lowered energy capacity. It becomes our new norm, when it's not really normal. That's why I think it's so important that anyone who thinks they simply have low energy get their iron measured to see if that's the real cause.
I think your body is definitely recovering from your blood donation. It can take nearly two months! And if your numbers were already on the low side, a donation can trigger a deeper drop into anemia. That's exactly what happened to me! I donated for the first time this past June.
I also wouldn't put 100% faith in the blood donation center being meticulous. Some workers are, but there can be some who aren't. My guy couldn't even get a blood pressure reading on me and still let me go through. Also, they test just your hemoglobin (not iron) and you have to be at a minimum level before they're supposed to let you donate. Well, I found old blood results of mine done 3 years ago at a time when I wasn't even feeling major fatigue yet (I've been exhausted for two years), and even when I felt my version of "normal" back then my hemoglobin number was below the cut off. There's no way my hemoglobin was higher at the time of the donation. I would've liked if my donation center was very transparent about the hemoglobin minimum and had it written on a sign upon entrance. If I'd known beforehand that the cut off for women is 12.5, then I would've not even bothered. I've been below that in every blood test since my teens.
So yeah, an iron test may be just the thing to get you on a recovery plan.
Like you, I had also thought the pronounced shift I'd felt in my energy the last two years was due to getting older. I regret that I suffered when I didn't have to.
Thank you for reading my anemia exposé.