Pretty much everything that can have a positive impact on the body can have a negative one if you overdo it (e.g. water, salt). If someone is claiming something

Pretty much everything that can have a positive impact on the body can have a negative one if you overdo it (e.g. water, salt). If someone is claiming something can have a positive impact on the body, it doesn't make sense to me to assume it's harmless as well without evidence.