NAD⁺ and NMN need to be slightly acidic, both to maintain stability, and improve sublingual absorption.
Our products vary between 4.0 and 4.5 pH, which is similar to the acidity of tomatoes on the pH scale.
Prolonged exposure could in theory contribute to loss of enamel, but less so than more acidic foods such as lemons or oranges.
The sublingual powder should be placed under the tongue to dissolve. It should not come in contact with the teeth.