How artichoke polyphenols survive digestion and cross gut cells in lab tests
What it found
In lab tests, about 55.8% of artichoke polyphenols survived simulated digestion, but human gut cells took in only 0.16%.
One compound, apigenin-7-O-glucoside, crossed the cell layer at 1.15%.
What they found
Animal and lab studies
Surviving simulated digestion
After all three digestion steps, 55.8% of total artichoke polyphenols were recovered. Chlorogenic acid had the highest recovery at 70.0%, while two other acids came back at 41.3% and 50.3%.
Uptake by gut cells
Human gut cells in a dish took in artichoke polyphenols quickly, peaking after 30 minutes. The overall efficiency was very low at just 0.16%.
Crossing the cell barrier
Only one compound, apigenin-7-O-glucoside, passed fully through the cell layer. About 1.15% of it reached the other side after 60 minutes.
Breakdown products found
Coumaric acid, caffeic acid and related compounds appeared on the far side of the cells. This suggests the gut cells themselves broke down some of the original artichoke compounds.
Protection against LDL oxidation
In test tubes, caffeic acid protected human LDL particles from oxidation best, needing 0.28 µg/mL to cut damage in half. Chlorogenic acid needed 1 µg/mL, and whole artichoke extract needed 6 µg/mL.
What the authors conclude
- They say that simulated digestion did not greatly harm the eleven polyphenols found in artichoke heads.
- They note that human gut cells in a dish took in these compounds poorly, though one flavonoid did cross the cell layer.
- The authors suggest these lab models are useful for studying how food structure affects the release and uptake of plant compounds.
How it was done
Artichoke contains plant compounds called polyphenols that may offer health benefits, but they must survive digestion and be taken up by the gut to work. Scientists do not yet know much about how these specific compounds behave during digestion and uptake.
Researchers put artichoke heads through a three-step simulated digestion using artificial saliva, stomach and gut fluids. They then exposed a layer of human gut cells (Caco-2) to an artichoke extract for 30 to 120 minutes. They also tested how well caffeic acid and chlorogenic acid protected human LDL particles from oxidation in test tubes.
What it can’t tell you
- These tests used lab dishes and artificial digestive fluids, not living people. They cannot show exactly what happens when you eat artichoke.
- A cell layer in a dish lacks the full structure and blood flow of a real human gut, so actual uptake in your body could differ.
Who paid
- Authors work at
- Institute of Sciences of Food Production (ISPA), Italy
The paper
- Title
- Polyphenols from artichoke heads (Cynara cardunculus (L.) subsp. scolymus Hayek): in vitro bio-accessibility, intestinal uptake and bioavailability
- Type
- Study
- Evidence
- Animals and lab studies
- Summarised from
- Full text
- Cite
- D'Antuono I, Garbetta A, Linsalata V, Minervini F, Cardinali A (2015). Polyphenols from artichoke heads (Cynara cardunculus (L.) subsp. scolymus Hayek): in vitro bio-accessibility, intestinal uptake and bioavailability. Food & function. doi:10.1039/c5fo00137dFree full textPubMed 25758164DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error