RPG, Glycolog, Slinmax I found nothing out of all 3 of those products
again I am very detailed anytime I run a new GDA and this is how I test them
Take a meal with 25,50,75,100g of carbs and take my BG Before the meal
wait 90-120 minutes after the meal and re-take my BG
This shows you how fast the product can help baseline Blood glucose aftre a carb based meal.
Expensive to buy all the strips? Sure... but to know what the product is doing and the impact is truly has is worth its weight in gold, and saves you money in the long run on what works and what doesn't work.
This is just my 2 cents. If you want to invest in a GDA I highly suggest using a blood glucose monitor and seeing how well each product responds for you.
Slintensity V2
Glycoshield
Predator
All 3 were far superior.