We use strawberry jam as an example to explore the underlying principles of water activity, a key technique for food preservation.

This story is a component of the feature “Seasons of Preserves: Berry Jelly,” which is part of a four-part series on preserving fruit at home called “L.A. in a Jar.” As RuPaul sings in the 2012 song ...

Pectin is a fiber found in fruits and vegetables like apples and citrus. Pectin can help with digestion and lower cholesterol levels. Eating pectin-rich fruits may cause gas, bloating, and abdominal ...

An apple’s most useful part for digestion never gets absorbed. The soluble fiber called pectin travels the full length of the gut untouched by human enzymes, and that journey is precisely what makes ...

Q: I read about a treatment for nighttime urination (nocturia). The suggestion was a teaspoon of pectin in 3 ounces of grape juice every day. My physician prescribed an 81-mg aspirin per day after I ...