Answer

For upwas, the safest Jain practice is to avoid toothpaste and brush only with plain water, because most toothpastes contain ingredients, flavors, sweeteners, or chemicals that may be swallowed even slightly.

Explanation

In Jain upwas, care is taken to avoid intake through the mouth. Toothpaste can create taste and foam, and a small amount may accidentally go inside. So many Jains prefer:

• Brushing gently with plain water
• Rinsing the mouth carefully
• Using a clean toothbrush without paste

If you follow a particular guru, sangh, or family maryada, it is best to follow their guidance, because practices may differ.

Takeaway

For upwas, instead of choosing a toothpaste brand, the more careful Jain option is: use plain water only.