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Read one chapter at a timeOne of the highest-antioxidant common fruits, because of the dark skin. About 8 grams of fibre per cup, much of it in the seeds.
Sturdier than raspberries: they keep several days in the fridge.
Traditionally the leaf and root were used for loose bowels.
A blackberry is the raspberry's tougher relative. It grows almost anywhere, holds its shape, and travels better. The seeds are bigger and more noticeable, which some people love and some don't. The colour is the point. That near-black skin is packed with anthocyanins, and blackberries measure among the highest antioxidant fruits commonly eaten. In northern Iran the wild brambles grow along field edges, and the berries are gathered late in summer, after the raspberries have finished.
Known to botanists as Rubus fruticosus.
Colour in fruit isn't decoration. The pigment that makes a blackberry black is the same compound being studied for blood-vessel and brain health. Eating a bowl of very dark fruit is one of the simplest ways to get those compounds without any supplement.
Dark berries appear again and again in studies of blood vessels and thinking as people get older. The blackberry is the cheapest and hardiest of them. Frozen bags cost little and last all winter, which matters more for a lifelong habit than any single nutrient does.
It was used: high fibre for a low sugar load; vitamin C and vitamin K. Manganese for bone and connective tissue.
Blackberries grow on long, arching, thorny canes that scramble over walls and hedges. Like the raspberry, each berry is a cluster of tiny fruits. The difference is simple: when you pick a blackberry, the white core comes with it, so the berry is solid rather than hollow. It ripens from green to red to a deep, glossy black.
Family: Rosaceae (rose family).
Persian temperament: Cold & Dry (1st degree). Cooling like the other dark berries, with a drying, astringent (tightens tissue and leaves a dry feeling in the mouth) edge from the tannins (plant compounds that give a dry, puckering taste).
Persian and Greek medicine read the blackberry as cool and drying, more astringent than the raspberry. The ripe fruit was cooling and mildly loosening. The unripe fruit, the leaf, and the root were strongly binding and were given for diarrhoea and for sore, bleeding gums. This reflects traditional use, not a modern medical recommendation — bramble leaf and root preparations are medicines, and anyone who is pregnant, breastfeeding, or on regular medication should check with a doctor first.
It was used: cooling the blood in hot weather and mild loosening of a slow gut.
The wild bramble is a hedgerow plant, not an orchard plant. That has always made it a food of walkers, shepherds and children rather than a food of markets — a fruit you find rather than buy.
Primary compounds
Anthocyanins (cyanidin); ellagitannins.
Vitamins
Folate
Other notable constituents
Minerals: Manganese, Copper, Potassium · Antioxidants: Ellagic acid, Quercetin (a plant compound found in onions, apples and tea)
Fiber: ~8 g per cup
Strong evidence
Higher dietary fibre intake is associated with lower all-cause mortality across large cohorts.Strong evidence
Moderate evidence
Berry anthocyanin (the natural colour pigments that make fruit red, purple or blue) intake is associated with lower risk of heart and blood vessel events in prospective cohorts.Moderate evidence
Early research
Berry polyphenol (protective plant compounds) intake was associated with slower rates of cognitive (to do with thinking and memory) decline in older women.Emerging evidence
Eaten from the bramble: only the berries that drop into your hand are truly ripe.
Slow compote — gentle heat, a little sugar, lemon at the end to hold the colour.
Bramble leaf gargle is dried leaf steeped strong, cooled, and used as a mouth rinse.
Frozen on a tray then bagged, to keep them separate.
Fresh in late summer, when the berries come away with no pull.
Compote: five minutes on low heat with a spoon of sugar and a squeeze of lemon.
Blended into a dark, thick drink with yogurt.
Frozen whole for winter breakfasts.
Eat fresh, ideally slightly warm from the sun.
Fold into yogurt, or crush over labneh with a little honey.
Cook briefly with a spoon of sugar into a loose compote for cold mornings.
Freeze for winter: they hold their shape better than raspberries.
Yogurt
Dark fruit against white yogurt. Crush two berries in and leave the rest whole.
Walnut
Both come off the same autumn hillside in northern Iran. They belong on the same plate.
Honey
Blackberries can be sharp when underripe. A trickle of honey settles that without hiding the fruit.
Apple
Stewed together, the apple gives body and the blackberry gives the colour.
The seeds are hard and can bother some people with sensitive guts.
Wash roadside berries well; brambles collect dust and spray.
Only pick from waist height and above, away from busy roads.
Rare allergy in people sensitive to other Rosaceae fruits.
The medicinal leaf and root preparations are astringent and should not be taken long term without advice.
Warfarin — Blackberries carry some vitamin K. Steady intake matters more than the exact amount. (low concern)
Iron tablets — The tannins in blackberries bind iron. Leave an hour between a large bowl of berries and an iron tablet. (low concern)
Pregnancy and breastfeeding
Good food in pregnancy — fibre, folate, vitamin C, and low sugar for the volume. Wash wild-picked fruit properly; roadside brambles collect more than dust.
Children
Children pick and eat them straight from the cane, which is half the pleasure. Watch the thorns rather than the fruit. The seeds are hard and can annoy a very small child.
Older adults
High fibre, soft, and requires no preparation. The hard seeds are the one drawback for anyone with dentures or a sensitive gut; a brief cooking and a sieve solves it.
Spring
Nothing but leaf and thorn. The brambles are growing.
Summer
Late summer brings the first ripe fruit, and it ripens unevenly on the same cane.
Autumn
The best of it. Pick after a dry spell — rain-swollen berries taste of water.
Winter
Frozen. They hold their shape and colour better than most soft fruit.
What is the difference between a blackberry and a raspberry?
The core. A raspberry leaves its white core on the plant and comes away hollow. A blackberry keeps the core, so it's solid. Blackberries are also darker, firmer and slightly more tart.
Are the seeds a problem?
For most people, no — they are part of the fibre. If they irritate your gut or your teeth, cook the berries into a compote and pass it through a sieve.
End of the Blackberry guide