Calcium alginate and blood fat levels after a fatty meal in people
What it found
Taking 1.5 g of calcium alginate with a fatty meal kept blood fat levels lower for up to 6 hours in healthy adults.
Calcium levels in the blood also rose slightly while sodium levels dropped.
What they found
Studies in people
Lower blood fats
Blood fat levels were lower at every check from 2 to 6 hours when people took calcium alginate instead of the placebo. The peak level and the overall amount measured over 6 hours were both about 20% lower.
Less leftover cholesterol
A type of leftover cholesterol particle was also lower at all time points with calcium alginate. The overall amount over 6 hours was about 27% lower than with the placebo.
More calcium in blood
Six hours after the fatty meal, the change in blood calcium was higher in the calcium alginate group compared to the placebo group.
Less sodium in blood
At the same 6-hour mark, the change in blood sodium was lower after taking calcium alginate than after taking the placebo.
What the authors conclude
- They conclude that calcium alginate reduces the rise in blood fats and leftover cholesterol particles after a fatty meal in healthy adults.
- They suggest it could be used as a supplement to help prevent conditions like high blood fats.
- They note that the rise in blood calcium might mean the body absorbs more calcium from this ingredient.
How it was done
Heart disease is a leading cause of death worldwide, often linked to fats building up in artery walls. The authors had already shown in rats that calcium alginate lowers blood fats after eating, so they wanted to see if it works in people too.
Eight healthy adults ate a high-fat drink and then took either five capsules of calcium alginate (1.5 g total) or empty placebo capsules. Blood tests were taken before the meal and again at 2, 3, 4 and 6 hours afterward. Each person tried both the real capsules and the placebo on separate days, one week apart.
What it can’t tell you
- Only eight people took part, mostly men, so the results might not apply to everyone.
- The study only looked at a single dose on one day, so scientists do not yet know what happens if you take it every day for months or years.
- People who absorb fats slowly were left out during screening, so the findings may not apply to them.
The paper
- Title
- Effect of Calcium Alginate on the Suppression of Postprandial Elevation of Serum Triglyceride Level in Humans-A Placebo-Controlled, Randomized, Double-Blind, Crossover Study
- Type
- Randomised controlled trial
- Evidence
- Studies in people
- Summarised from
- Full text
- Cite
- Namiki Y, Kimura S, Sasaki R, et al (2025). Effect of Calcium Alginate on the Suppression of Postprandial Elevation of Serum Triglyceride Level in Humans-A Placebo-Controlled, Randomized, Double-Blind, Crossover Study. Journal of nutritional science and vitaminology. doi:10.3177/jnsv.71.467Free full textPubMed 41183974DOI
Summary written 1 Oct 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error