If heme-based iron is your want, the reputation of this is old and trusted.
Liver tablets were a big thing in the 70s, so I'm told. You have people who swear by them and others who say they are rubbish. I noticed more pungent gas, but little in terms of strength and size. Problem is you have such mixed information with dosage. I tried 8 tabs a day, but nothing. Inexpensive, so worth a shot, but anything that doesn't work is a waste of money. Worth a shot, but I think it's not really worth it.