She must see reliable, predictable, and positive results from her recommendations. For that reason, Dr. Slagle is very particular which products she uses Over the years she has carefully selected from a number of companies. Because it was difficult for Dr. She has instead selected those properties which most motivate her to recommend a particular supplement. All supplements are not created equally.
Some manufacturers only purchase from the highest quality providers for their source material.
They are careful not to dilute or change the product in any way. Since many of Dr. Slagle's patients are allergic she has carefully selected hypoallergenic unadulterated products to minimize any chance of allergies.