Yes blackberries are very good for your liver.
Not only are blackberries good for your liver but other foods and drinks such as coffee, oatmeal, grapes, nuts and fatty fish.
The blackberries are one of the best foods for your liver because they can help remove toxins from your liver which keeps your liver healthy.
Also blackberries can make you sleepy.
Not all people get sleepy when eating blackberries but for some people blackberries have a natural relaxing effect which helps some people get tired and fall asleep.
Blackberries are also very good for your health and are full of vitamins, minerals, nutrients and antioxidants.
Blackberries can even help prevent heart disease, heart attacks, strokes and may even reduce your risk of cancer and dementia.
Blackberries can cause red stools which is normal.
Other foods such as red berries, strawberries, strawberry milk, beets etc can all make your poop or stool turn red.
So if you've been eating blackberries or other berries or any other foods that are pink or red in color then your stool can become red.
The red stool or red poop usually clears up on it's own after you stop eating the red foods or drinking red drinks.
However if the red poop or red stools continue then it could be something wrong inside your bowels or colon.
So get yourself checked out just to be safe if the red stools or red poop continues.
But eating foods that are red or pink or other colors can naturally and normally change the color of your poop.