If you have reached an impasse, or if the adjuster fails to act promptly on your claim, politely suggest that the difficulties might be overcome if you both got another opinion. Ask to speak with the claims supervisor.
K stands for kosher the company is saying their product has no known products added that would deem the product not kosher. This doesn't certify the product kosher it just says the product is kosher style and no meat and dairy are mixed together, nor are there any animal by products added.
Dairy products are also good sources of potassium. Having too much potassium in the blood is called hyperkalemia; having too little is known as hypokalemia. Keeping the right potassium balance in the body depends on the amount of sodium and magnesium in the blood.