Using Vegetal 1.0 Soft Black WeBio Gel Hair Color on white hair can be effective, but there are some important considerations to keep in mind.

• Effectiveness on White Hair: This product is a topical hair color kit and should cover white hair, but results may vary depending on your hair texture and how well the dye adheres to white strands.
• Safety: Since it is not prescription-based, it is generally safe for use, but if you have sensitive scalp or allergies, check the ingredients carefully.
• Patch Test: Perform a patch test 48 hours before applying the dye fully to avoid allergic reactions.
• Professional Advice: If you have scalp issues or want the best coverage, consulting a dermatologist or a professional hair colorist is recommended.

If you want, I can explain how to do a patch test or what to look for in ingredients. For personalized advice, please consult a dermatologist or hair care specialist.