If you equip 2 True love pendants, then take them off again the vitapod-like effect stays. It doesnt heal you, but you get more HP to gain in the level.
Edit: You can heal, equipping a vitapod resets the effect though. Avoiding vitapods makes this a viable exploit.
I just tried this, and it doesn't seem to work for me. Do you equip them on one level, then take them off on another?
Edit: I used two Pendants on one level, then switched them out with another trinket on the next level. My health reset appropriately.