Final answer:
Meat, eggs, and poultry are all classified as acid-forming foods as their digestion leads to the production of acidic by-products. So, the correct answer is option (D).
Step-by-step explanation:
When we speak about acid-forming foods, we refer to the effect foods have on the body's pH level after being metabolized. Meat, eggs, and poultry are all considered acid-forming foods because their digestion leads to the production of acidic by-products, potentially increasing the acidity of the body's fluids and tissues. Therefore, the correct answer to which of the following is classified as an acid-forming food is d. All the above are acid-forming foods.
These types of foods, in contrast to alkalizing foods like most fruits and vegetables, contribute to a lower, more acidic pH in the body. While acids are indeed common in many foods and are not harmful when consumed in balance, persistent consumption of high levels of acid-forming foods over time may result in negative health effects.