Unfortunately there’s no product proven to increase milk supply. It’s a supply and demand thing so removing milk more often is the only proven thing to work. Why are you concerned about your supply?
I read the reviews for this product & they say it tastes disgusting. I use the milky mama products (emergency brownies, cookies, & supplements) in tandem w/ lots of water & power pumping & that works for me. https://milky-mama.com
I have the mother’s milk tea and honestly it doesn’t do much. Oatmeal is great for lactation in my experience. Never tried this latte though.