General information, not an individual diagnosis. Ask a healthcare professional if you are unsure about your situation.
Anses advises avoiding homemade slime. An online recipe does not establish that the mixture is safe.
Recipes repurpose glue and detergents, sometimes contact-lens solutions, beyond their intended use.
Preservatives in some glues can cause contact allergies. Prolonged handling increases exposure.
Children should not repeatedly handle boric acid or its derivatives.
Not all dyes used in recipes are intended for skin contact.
For a commercial kit, follow its precautions. A kit does not justify adding household chemicals.
Sources
Your health review
Review your health
Mon bilan prévention is an appointment to discuss your habits and choose your health priorities. Review the four age groups and practical information.