I heard that eating too much animal liver can lead to Vitamin A overdose, and one of the side effects of this is hair loss. Is this hair loss that is distinct from MPB or is it related to MPB (i.e. accelerating MPB)? If it’s not related to MPB, will hair grow back (I’m assuming it will)?
Hair loss from male pattern baldness (MPB) and hair loss from drug (such as vitamin A) toxicity is not the same. You would probably have to eat massive amounts of liver to have a vitamin A overdose. From Wikipedia’s entry on hypervitaminosis A: “The liver of certain animals â€” including the polar bear, seal, and husky â€” is unsafe to eat because it is extraordinarily high in vitamin A.”
If you have vitamin A overdose/toxicity I think hair loss would be a lesser of your concerns, as you will have other medical issues. For more on vitamin A toxicity, please see eMedicine.com.