An Opinion on Those Grow Taller Forum Sites

Forums are not new to the internet. They've been around for many years now. When forums started off the topics were all encompassing and you'd typically have tens of thousands in each forum community.
Nowadays forums are targeting particular areas. One in particular that I'm interested in is Grow Taller. A search on Google or the other major search engines reveal the amount of forums available when searching for phrases such as "grow taller."
These sites are usually owned by either online marketers looking to create a site that gets a lot of traffic with the aim to make money from advertisements or through selling a product using through affiliate marketing. Other owners on these forums could also range from Grow Taller product owners, Doctors or even subject enthusiasts.
The biggest group of people on these forums are those looking for help to grow taller. I would say that this group would make up around 90% of the users in the forum. The other 5% are those that have genuine answers and usually do not get paid for their advice, and the other 5% are those that are selling their products.
So how do you determine good advice from that which is just an ad. To ensure the best advice you'll need to check up on the person giving the advice. Check their credibility of previous posts and how people had responded to them.
You'll quickly determine if the person giving you advice is only in it for the money, or if they have some good advice for you. In saying that however, don't get me wrong. There might be some people out there that are giving you good advice whilst making money. I actually know some of these people personally. My point here is that the people that are giving you advice for free are not commonly inclined to favour a certain way.
A word of warning: don't spend too much time just reading all the posts. Get involved. Introduce yourself and ask all your questions confidently. You'll pick up a lot of golden information this way. Hopefully once you've experimented with some grow taller products you'll stick around on the forum to help others looking for advice as well.