Wouldn't you be worried if they showed you your own blood cells looking like that?
Maybe, maybe not. That could well be a normal, healthy blood sample, just not pure red blood cells, like in the other photo.
Maybe it is bad, in which case, it is likely from something entirely different.
These people are scammers, charlatans, con artists - don't trust their photos any more than their words.
Its all lies.
I wonder why leukaemia or thalassemia don't just go away, after all red blood cells are "replaced every 30 days" (with more carrying the same defects?)
Maybe because the problem is in the formation of the red blood cells, which might explain why bone marrow transplants are required. Just guessing, never studied that aspect of medicine.
30 days - actually it is about 120 days for healthy cells. The 30 days figure was remembered from when I studied how carbon monoxide poisoning works - when smoking, or exposed to carbon monoxide leak, the CO latches onto the iron core in red blood cells, which is where oxygen is usually held. Unlike oxygen, CO is never released again, so the red blood cell is effectively useless, and this is why over time (short time with CO boiler leak, longer with smoking etc) exposure to CO causes oxygen starvation and eventual death with constant exposure. It takes at least 30 days to recover from CO poisoning, as you need your blood cells to die and be replaced. This is why smokers are less fit than no-smokers - they are reducing their blood's ability to carry oxygen as they are adding more CO every day - not enough to kill them, but enough to prevent them becoming an Olympian / football superstar. I learned that with the OU, self study at home!