It's not known, but it's doubtful. The only "evidence" of human sacrifice is from the writings of Adam of Bremen, a Christian priest who traveled to Sweden and claimed there were human sacrifices at the holy grounds of Uppsala. But there is exactly ZERO archeological proof for this from excavations at Uppsala, and no evidence from rune stones or Icelandic sagas to suggest this occurred. In all likelihood, Adam of Bremen was just telling lurid stories to his fellow Christians back in Germany.
That said, the other form of human sacrifice featured in an earlier episode, where a slave girl is ceremonially killed so she could be buried with her master, is better established. The Arab historian Ibn Fadlan, who traveled extensively with the Rus (Swedish Vikings in present-day Russia and the Ukraine), wrote about this, and there are two instances of apparent archaeological evidence for this (one in Russia and one in Norway). However, even if true, it's not known how widespread the practice was or for how long it was practiced (and it couldn't have been that widespread, seeing how little evidence of it there is). But it's generally assumed to have been something that was done at least occasionally.
Thanks! I've been a part of this forum for years and the depth of knowledge around here continues to astound me.