Activia, Chobani, Haagen-Dazs, Yoplait and Dannon are some yogurt brands with high amounts of live cultures. There are about 40 such brands, according to the National Yogurt Association.
The National Yogurt Association approves participating brands to use its Live & Active Culture seal. The NYA's Live & Active Culture seal is a voluntary identification that manufacturers use to connote refrigerated yogurt products with at least 100 million cultures per gram at the time of manufacture.
On a frozen yogurt product, the seal indicates the presence of at least 10 million cultures per gram at the time of manufacture. Cultures within yogurt include Lactobacillus bulgaricus, L. acidophilus, L. bifidus and Streptococcus thermophilus.