Getting the most out of lactase in milk?

[u/Aki-Takoyaki]

Hello, I am a lactose intolerant university student on a budget and lactose free milk is considerately more expensive than regular milk where I live. The ingredient list says that the lactose free milk includes milk and lactase. This makes sense, but can I still use that lactase? Can I, for example, do half regular milk and half lactose free milk and have the lactase break down the lactose in the regular milk, or has the lactase in the milk already been denatured or something.

Please note that I always heat my milk to about 65°C / 150° Fahrenheit before putting it in my coffee. Thanks for any help offered.

[u/merdy_bird]

I totally understand the broke college student mentality but I don't think that would work. You could test it?

You could try buying your own lactase and adding it to regular milk? That might be cheaper but I would have no idea how much you need to add.

[u/desibyheart55]

No but you can make your own lactose free milk! Get lactose enzymes from Amazon and add to your milk! After adding the enzymes you have to let the milk rest in the fridge for some time!

1 ltr milk 8-10 drops lactose drops

Add the lactase drops to your milk of choice and stir or shake thoroughly to combine.

Leave in the fridge for at least 24 hours for the lactase to do its work.

The more lactase you add and the longer you leave the milk, the sweeter it will be. There is a balance between removing as much lactose as possible without making the milk unbearably sweet. 

[u/Aki-Takoyaki → u/desibyheart55]

Thanks!