Answer

Yes, generally isabgol (psyllium husk) can be taken during besna/besanu, if it is plain and taken only for health reasons.

Explanation

In Jain practice, during fasting or tapasya, medicines or health-supporting substances are usually treated differently from normal food, especially when needed for digestion, constipation, acidity, or medical comfort.

But you should keep these points in mind:

• Use only plain isabgol, without added flavors, sugar, colors, or other ingredients.
• Take it with permitted liquid according to the type of besna you are doing.
• If your family, guru, or local tradition has a stricter rule, follow that guidance.
• If it is medically necessary, health should be handled responsibly.

Spiritual Understanding

The purpose of besna is self-control, simplicity, and reducing attachment to taste. If isabgol is taken as medicine, not for taste or enjoyment, it is generally viewed differently from ordinary eating.

Takeaway

Plain isabgol may be taken in besna for genuine health needs, but follow the rules of your specific vrat/tapasya and your guru’s guidance.