These brands have been tested and seem to consistantly have the advertised product and amount.

• DoNotAge.com
• Now Foods
• Swanson
• Thorne
• Solaray
• Natural Factors
• EnzyMedica
• SurperiorSource
• Doctors Best
• Life Extension
• Smidge
• Paradise
• California Gold
• Lake Avenue
• Jarrow
• Source Naturals
• Carlson
• NutraBio
• Dr Mercola
• Dr Woods
• Country Life
• Nodic Naturals
• MacroLife