> There is arsenic in apples seeds and I've never heard of long term issues from eating a few of those.
That's for two reasons:
1: Because almost no one eats apple seeds - even if you swallow them, they probably pass through unchanged.
And, 2: There is no arsenic in apple seeds! It has cyanide - which is a totally different thing.
Lead on the other hand builds up in your system and causes permanent damage.