Final answer:
To evaluate the validity of the treatment, Karla should consult with her doctor, consult with the Better Business Bureau, and speak to a parent or trusted adult.
Step-by-step explanation:
To evaluate the validity of the herbal supplements for treating depression, Karla should:
- Ask her doctor for advice - a healthcare professional can provide guidance on the safety and effectiveness of the supplements and give appropriate recommendations.
- Consult with the Better Business Bureau - this can help determine if the website selling the supplements has any complaints or unresolved issues.
- Speak to a parent or another trusted adult - getting input from a trusted adult can provide valuable insight and guidance.
Reading testimonials on the website and asking friends for their opinion may not provide reliable information, as testimonials can be biased and friends may not have professional expertise in mental health. Trying the herbal supplements herself is not recommended without proper medical advice.