As we age, our stomach acid production tends to decrease, leading to potential digestive issues. The other options are common changes associated with aging.

GERD is more common among older adults due to the weakening of the lower esophageal sphincter, which allows stomach contents to flow back into the esophagus.

Aging generally leads to a decrease in the digestive system's efficiency due to various physiological changes.

As we age, our bodies produce less lactase, the enzyme responsible for breaking down lactose, leading to lactose intolerance.

Reduced saliva production can lead to difficulty swallowing, increased risk of tooth decay, and impaired digestion of carbohydrates, but it does not enhance nutrient absorption.

The gallbladder's primary function is to store and concentrate bile produced by the liver, which aids in the digestion and absorption of fats.

Older adults are more susceptible to foodborne illnesses due to a weakened immune system and reduced stomach acid production, which can allow harmful bacteria to survive and multiply.

Constipation is a common digestive issue among older adults due to slower colonic transit time and reduced muscle tone in the digestive tract.

Older adults are recommended to consume 25-30 grams of fiber per day to promote digestive health, prevent constipation, and maintain a healthy weight.

Reduced stomach acid production can lead to an increased risk of foodborne illnesses, impaired absorption of iron, and difficulty digesting proteins, but it does not enhance calcium absorption.

The pancreas's primary function in the digestive system is to secrete digestive enzymes, such as amylase, lipase, and protease, which help break down carbohydrates, fats, and proteins.

Regular exercise can help improve digestive health in older adults by stimulating colonic motility, reducing constipation, and promoting overall well-being.

Slower colonic transit time can lead to constipation, increased risk of diverticular disease, and impaired absorption of nutrients, but it does not enhance nutrient absorption.

Older adults are recommended to consume 2-3 liters of water per day to maintain hydration and support overall health, including digestive function.

Consuming probiotics can provide various health benefits, including improved digestion, boosted immunity, and reduced risk of heart disease, but it does not increase the risk of foodborne illnesses.