Answer

Yes. In Jain Dharma, if you eat a biscuit bought from outside, its ingredients should also be considered.

Explanation

You should check whether the biscuit contains ingredients that are not acceptable according to your Jain practice, such as:

• Egg
• Gelatin
• Animal-derived additives
• Honey
• Root ingredients, if you avoid kandmool
• Preservatives or flavouring agents whose source is unclear

Also, for stricter Jain observance, one may consider:

• Whether it was prepared before sunset
• Whether it is fresh or stale
• Whether it may contain living organisms due to age, moisture, or improper storage
• Whether it was made in a place where non-vegetarian items are also prepared

Spiritual Understanding

In Jain Dharma, food is not judged only by its outer appearance. The source, ingredients, preparation, and intention also matter because the aim is to reduce himsa as much as possible.

Takeaway

So yes, if you eat an outside biscuit, the ingredients are counted. If the ingredients are unclear, a careful Jain usually avoids it or chooses a clearly vegetarian/Jain-friendly option.