Short answer: It depends on how strictly you follow Jain food principles, and on how the soya chunks are made.

Key points from a Jain-dharmic view:

1. Basic ingredient (soybean)

- Soybeans are beans, i.e., seeds of a plant. - They are not root vegetables, so there is no direct “root” objection like potato, onion, garlic, etc. - So, from the ingredient-type angle, soybean itself is not inherently prohibited like meat, egg, onion–garlic, alcohol, etc.

1. Issues that can make soya chunks non‑suitable for Jains

Check the packet carefully for: - Added onion/garlic or masala with onion–garlic - Egg powder or any non‑veg additive - Strong preservatives, emulsifiers, flavour enhancers that may be animal‑based - Cross‑contamination: made in a factory handling meat/egg products (important for stricter Jains)

If any of these are present, such soya chunks should be avoided.

1. Processing and violence (hiṁsā) viewpoint

- Soya chunks are usually made from defatted soy flour (highly processed). - Compared to fresh grains/dals, heavily industrial processing often involves: - Higher microbial killing, - Possible use of non‑veg processing aids in some factories. - Very strict practitioners (esp. including many sādhus/sādhvīs and serious sādhak) usually prefer simple, minimally processed grains/dals and may avoid items like ready-made soya chunks, textured vegetable protein, mock meats, etc., because they: - Imitate meat, and - Increase taste‑attachment and complexity, which goes against saṃyama and aparigraha.

1. Practical guideline for a Jain gṛhastha (householder)

- More conservative / sāttvik approach: - Avoid soya chunks and similar “meat‑like” processed foods. - Use simple, natural dals/beans instead (moong, toor, chana, rajma, etc.). - Moderate household practice: - If: - Ingredients are fully vegetarian, - No onion, no garlic, no eggs, no alcohol‑based additives, - You are okay with factory‑processed foods, - then many Jains do consume plain soya chunks in limited quantity. - Always prefer: - Freshly cooked, - Prepared before sunset, - With simple spices, without onion–garlic, without fermented or stale combinations.

1. If you want to be on the safest side spiritually

- For minimizing hiṁsā and rāg (attachment to rich tastes), it is safer to avoid such processed, meat‑like products and rely on simple pulses and grains. - This aligns more with the spirit of Jain food discipline, not just the letter (“veg or not”).

Summary:

• Technically possible for Jains to eat soya chunks if ingredients are fully vegetarian and Jain‑compliant.
• Spiritually safer and more in line with saiyam to avoid highly processed, meat‑like products and keep diet simple and sattvik.
• If you are trying to progress more seriously in Jain sādhanā, it is better to leave such items.