what is the alkalising drink ?

Hello. A friend from the Wilson's syndrome forum suggested I try the "alkalising drink that has a special type of seaweed vegetable in it."

May I please find out what this drink is, consists of?
What type of seaweed? Amount to start out?

I was diagnosed with a high reverse T3 along with my already severe adrenal burnout, which is being treated.

I am also on the lowest dose of T3 and can't seem to raise the amount as it gives me more anxiety ( indicating it is still to stimulating and stressing on my adrenals )
I was wondering if this drink would be beneficial at all for me at this point?
Any replies would be very much appreciated.
Thank you.
Pauline Tweet