What you describe is a medical emergency. I'm assuming you've been to a doctor already about this if you are aware that you have severe anemia, know your hemoglobin, and know you have liquid in the lungs. Severe folate deficiency can produce megaloblastic anemia that progresses exactly this way (high-output heart failure). Your medical professionals should be able to give you high-dose folate and investigate potential contributors like B12, iron, absorption issues, etc. Are they working to stabilize you? You are correct. Muscle-meat-only is going to be low in folate. You'll never meet your RDA of folate this way. Liver is the concentrated source (beef liver is good but chicken liver is much higher. I wouldn't add 150g per day though, because yes, copper toxicity (and vitamin A toxicity) is a real concern. Other folate sources that are carnivore friendly include eggs with the yolks, cheeses, milk and yogurt, fish row or caviar, and certain shellfish. I would include these in addition to some 30g-60g of liver a few times a week. It can be viable for some people for years, but it is higher-risk and less reliably complete than broader animal-based approaches. Folate is the clearest long-term gap. However, there are individuals who live this muscle-meat only approach for years and remain stable, and most people low in folate do not develop megaloblastic anemia + high-output heart failure. And yes, there could be a genetic component that you have that others do not (for example, people with reduced MTHFR activity already convert and utilize folate less efficiently). The Lion Diet functions best as a strict elimination tool (weeks to months, sometimes longer) to identify triggers. Low folate on a pure muscle meat diet is a real issue that some people encounter after years. Mikhaila Peterson had to start incorporating liver after 5 years when she learned she was folate deficient. At the time, deficiency is not universal and many people are fine. There's just various potential roles at play here. Most importantly is your health. I would be very pro-active about getting treatment if I were you.
