BIO FPX 1000 Assessment 4 Digestion Lab

Grace J.
September 30, 2026September 30, 2026
BIO-FPX1000, BS Psychology

Student Name

Capella University

BIO FPX 1000 Human Biology

Prof. Name

Date

Digestion Lab:

Digestion is the physiological process through which the body breaks food down into smaller components that can be absorbed and used for energy, growth, and other essential functions. A Digestion Lab typically examines how food is processed by the digestive system while also connecting digestion with nutrition, calorie intake, and food-label analysis. In this assessment, daily calorie needs are considered alongside the nutritional information provided for a selected food, such as Crazy Richard’s Crunchy Peanut Butter. Understanding serving size, calories, fats, carbohydrates, protein, sodium, vitamins, and minerals can help explain how a particular food contributes to overall dietary intake.

What Is Digestion?

Digestion involves a series of mechanical and chemical processes that begin when food enters the mouth. The digestive system breaks food into smaller nutrients that the body can absorb and use. These nutrients are transported through the body and support processes such as energy production, tissue growth, cellular repair, and normal organ function.

The gastrointestinal tract plays an important role throughout this process. Food moves through the digestive tract while enzymes, acids, and other digestive substances help break down carbohydrates, proteins, and fats. Nutrients are subsequently absorbed, while indigestible materials are eliminated as waste (Livovsky et al., 2020; Sensoy, 2021).

Daily Caloric Intake

Calories represent the amount of energy obtained from food and beverages. The body requires this energy to maintain basic physiological functions and support physical activity. However, calorie requirements are not identical for everyone. Age, sex, body size, metabolism, activity level, pregnancy, and lactation can all influence individual energy needs.

A commonly cited general reference is approximately 2,000 calories per day for women and 2,500 calories per day for men, although actual requirements can vary considerably among individuals (Kolte et al., 2022). These figures should therefore be viewed as general reference values rather than universal targets.

Consuming too few calories may result in inadequate energy availability and fatigue, whereas consistently consuming more energy than the body uses can contribute to weight gain and obesity. Adequate energy intake is particularly important during pregnancy because additional energy and nutrients support maternal changes and fetal development (Most et al., 2019).

Calculating the Percentage of Daily Calories

To determine how much of a daily calorie intake comes from a particular food, the calories in one serving can be divided by the estimated daily calorie requirement and multiplied by 100.

Percentage of daily calories = (Calories in one serving ÷ Daily calorie requirement) × 100

For example, if a food provides 180 calories per serving and an individual uses a 2,000-calorie daily reference:

(180 ÷ 2,000) × 100 = 9%

Therefore, one serving provides approximately 9% of a 2,000-calorie daily reference intake.

This calculation provides context for understanding how an individual food fits into an overall diet. It does not, by itself, determine whether the food is healthy or unhealthy because nutritional quality depends on the complete nutrient profile and the person’s overall dietary pattern.

Crazy Richard’s Crunchy Peanut Butter: Serving Size and Calories

Crazy Richard’s Crunchy Peanut Butter can be examined as an example of how food-label information is used in a Digestion Lab. The stated serving size is approximately 2 tablespoons (32 grams), providing about 180 calories per serving.

Serving size is important because all nutritional values listed on a food label are generally based on the specified amount. Eating more or less than that amount changes the actual amount of calories and nutrients consumed.

For example, consuming two servings would provide approximately 360 calories. Therefore, comparing the actual portion consumed with the label’s serving size is essential when estimating daily nutrient and calorie intake.

Fat and Protein Content

The selected peanut butter provides approximately 16 grams of fat and 8 grams of protein per serving. Fat is an important source of energy and also supports several physiological functions. Protein is necessary for tissue maintenance, growth, repair, and other biological processes.

Although peanut butter can contribute protein and other nutrients to the diet, its relatively high calorie density means that portion size remains important. A food can provide useful nutrients while still contributing a substantial amount of energy when consumed in large quantities.

Sodium, Carbohydrates, and Sugar

According to the label information considered in this assessment, the peanut butter contains approximately 5 grams of total carbohydrate per serving, including about 3 grams of dietary fiber and 2 grams of sugar. It is also described as containing little or no sodium in the selected product information.

Dietary fiber is an important component of a balanced diet and can support normal digestive function. Sugar intake should also be considered within the context of the entire diet. When peanut butter is paired with foods containing substantial amounts of added sugar, such as sweetened spreads, desserts, or sugary beverages, the overall nutritional profile of the meal or snack can change.

Vitamins and Minerals

Peanut butter can contribute several nutrients to the diet, including minerals such as iron and calcium. These nutrients have important physiological roles. Iron contributes to oxygen transport and other biological functions, while calcium is essential for maintaining bones and teeth and supporting normal muscle and nerve function.

The nutritional contribution of any individual food should be considered as part of the overall diet rather than evaluated in isolation. A varied diet can provide a broader range of vitamins and minerals than relying heavily on a single food.

Pros and Cons of the Serving Size

A serving of approximately 2 tablespoons provides a convenient way to measure the amount of peanut butter consumed and makes it easier to compare intake with the nutrition label. The food also provides protein, fat, calories, and other nutrients in a relatively small serving.

However, peanut butter is calorie-dense. Consuming substantially more than the recommended serving can increase total calorie intake quickly. For individuals monitoring their energy intake, measuring portions can therefore be useful.

Pros and Cons of the Nutritional Profile

The selected peanut butter has several nutritional characteristics that may make it useful as part of a balanced diet. It provides protein, dietary fat, fiber, and minerals. Its versatility also makes it easy to combine with other nutrient-rich foods.

At the same time, the nutritional value of a meal depends on what the peanut butter is paired with and how much is consumed. Combining it with highly sweetened foods can increase overall sugar and calorie intake. Portion size and the broader dietary pattern should therefore be considered when evaluating the product.

Understanding Food Labels

Food labels provide consumers with information that can be used to compare products and estimate nutrient intake. Important information includes serving size, calories, total fat, carbohydrates, sugars, protein, sodium, vitamins, and minerals.

A food label should be interpreted carefully because the listed nutrient quantities correspond to the stated serving size. Consumers who eat larger portions may consume considerably more calories and nutrients than the amounts displayed for one serving.

Research on food packaging has also highlighted the importance of presenting nutritional information in a way that consumers can understand and use effectively (Schifferstein et al., 2021).

How Misleading Food Packaging Can Be Improved

Accurate and understandable food packaging can help consumers make more informed dietary decisions. Labels should communicate serving sizes and nutritional information clearly and consistently. Claims made on packaging should also accurately represent the characteristics of the product.

Clear labeling is particularly important because consumers may rely on packaging information when comparing products or estimating their daily intake. Transparent nutritional information can support better understanding of food choices and reduce confusion about the nutritional characteristics of a product.

Key Takeaways From the Digestion Lab

The Digestion Lab demonstrates the relationship between digestion, energy intake, and nutrition. Food is broken down into nutrients that the body can absorb and use, while calorie intake reflects the energy supplied by food.

The analysis of Crazy Richard’s Crunchy Peanut Butter demonstrates how a nutrition label can be used to examine serving size, calories, fat, protein, carbohydrates, sugar, sodium, and minerals. A 32-gram serving provides approximately 180 calories, illustrating why serving size is important when calculating daily energy intake.

Ultimately, no single food determines the quality of an individual’s diet. Understanding digestion and learning how to interpret food labels can help individuals evaluate foods within the context of their overall nutritional needs.

References

Kolte, A., Mahajan, Y., & Vasa, L. (2022). Balanced diet and daily calorie consumption: Consumer attitude during the COVID-19 pandemic from an emerging economy. PLOS ONE, 17(8), e0270843. https://doi.org/10.1371/journal.pone.0270843

Livovsky, D. M., Pribic, T., & Azpiroz, F. (2020). Food, eating, and the gastrointestinal tract. Nutrients, 12(4), 986. https://doi.org/10.3390/nu12040986

Most, J., Dervis, S., Haman, F., Adamo, K. B., & Redman, L. M. (2019). Energy intake requirements in pregnancy. Nutrients, 11(8), 1812. https://doi.org/10.3390/nu11081812

Osilla, E. V., & Sharma, S. (2019). Calories. In StatPearls. StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK499909/

Prada, M., Saraiva, M., Garrido, M. V., Rodrigues, D. L., & Lopes, D. (2020). Knowledge about sugar sources and sugar intake guidelines in Portuguese consumers. Nutrients, 12(12), 3888. https://doi.org/10.3390/nu12123888