No Follow Blogs. Do they help with keyword density?

[photoseo1]

I know no follow blogs don't pass page rank or link juice, but do they aid in help with making your site know for a specific keyword when you use anchor text?

[IKT]

My apology , but i disagree only on one thing

"...  you can almost guarantee yourself ..."

On a topic that is perfectly on grey zone like this (where not even the Google Webmaster prohibited it directly) , i know that i wont be able to guarantee it myself (even when it is backed with huge amount of correlated data)

All I am saying is, PERHAPS based on the correlation data made by mad scientist in SEOMOZ, the effect for links coming from Comment on Blog is not correlated to high rank , but as said by many correlation is not causation .. Again many on-going debate is running for this kind of discussion but no one can say "i guarantee it " (unless if uncle google decided to participate in this discussion himself) xD

my 2 cents

[photoseo1]

I definitely wouldn't guarantee blog commenting won't get you high rankings if you comment on quality do follow pages related to your niche. I have multiple sites that have first page rankings, some #1's with a great deal of blog comments. Not a practice I recommend as a full fledged strategy, but it is helping pages and rankings. As long as your comments are not spam and contribute to the conversation constructively they are definitely worth the time and you learn more about your industry along the way.

[adriandg]

No.  But not because of no follow, because it's a comment on a blog.  If it's a super easy link to obtain you can almost garuntee yourself that it:

1. won't have much effect on your rankings.

2. isn't worth your time

[akim26]

Search engines definitely want to see a "healthy balance" of do-follow and no-follow links, so some no-follow anchor text from relevant, authoritative, non-spammy sites is good. Certainly can't hurt.