Among the highest-fibre fruits available, and dense in anthocyanins.
Blackberries are one of the best fruits on the fibre-to-sugar ratio: roughly 5g of fibre
per 100g against only 5g of sugar. Very few fruits come close.
They are also dense in
anthocyanins — the dark pigments studied for inflammation and vascular function —
and in vitamin C and vitamin K.
The seeds contribute to the fibre and are the main
reason some people dislike them. Frozen blackberries are nutritionally equivalent to fresh and
usually much cheaper.
Per 100g. One of the best fibre-to-sugar ratios of any fruit.
Based on the nutrients and fibre this food supplies. These are supporting foods, not treatments.
Frozen is as good as fresh and costs a fraction. Berries are frozen at
harvest, so the nutrients hold up well.
Do not wash until you use
them. Moisture makes them collapse within a day.
Pair with
yoghurt. The protein and fat alongside a very low-sugar fruit makes a genuinely good
breakfast.
They freeze in a single layer if you want them separate
rather than in a block.
The fibre-to-sugar ratio is what makes blackberries useful. At roughly 1:1, they produce
a negligible glucose response while delivering meaningful fibre — something almost no
other fruit manages.
Anthocyanins are the dark pigment, and berry anthocyanins have
among the more consistent evidence in nutrition research for improvements in blood pressure
and vascular function. The effects are modest but they replicate, which is more than can be
said for many food compounds.
On blood thinners: blackberries are high in vitamin K, which interacts
with warfarin. Keep intake steady rather than variable, and tell your doctor.
Diabetes: whole fruit over juice, portion aware, and better eaten
with protein or fat than alone.
IBS: several fruits are high-FODMAP
and commonly trigger symptoms — tolerance is personal.
Kidney
disease: potassium may need limiting. Ask your doctor for your numbers.
This is information, not a prescription. If you are managing a diagnosed condition or taking medication, talk to your doctor before making a large change to your diet.
Nutrition figures on this page come from standard food composition data. These links let you check the numbers and read the underlying research yourself rather than taking our word for it.