COVID-19 is a multisystemic infection with profound physiological and behavioral sequelae, including marked disruption of dietary patterns. This study comprehensively analyzed the effect of the infection on nutrient intake by comparing dietary consumption pre and post COVID-19 and estimated dietary intake against the Estimated Average Requirement (EAR, 2020). Intake data were collected using 72-hour dietary recall questionnaires and measured retrospectively for both the periods. The overall differences between pre- and post-COVID-19 periods were highly statistically significant (p < 0.0001, α = 0.01) for all macronutrients-energy, protein, fat, carbohydrates, and fiber-and all micronutrients- vitamins A, C, D, E, folate and minerals such as iron, calcium, sodium, potassium, copper, zinc, magnesium, and selenium. When compared against EAR 2020, all nutrients, except vitamin D (p = 0.62) and iron (p = 0.47), demonstrated significant differences from the recommended levels at p < 0.0001, indicating a widespread deviation from the EAR 2020. It was also seen that the dietary intake post COVID-19 was increased for fiber, vitamins A, C, D, E, folate and minerals such as calcium, sodium, potassium, copper, zinc, magnesium, and selenium, but were reduced for energy, protein, fat, carbohydrates, and iron. Overall, the post-infection eating pattern indicated an extreme diversion from recommended standards, with overconsumption being the prevailing tendency. These results emphasize the importance of targeted nutritional interventions in post-COVID-19 rehabilitation to redress imbalances for the support of metabolic and immune rehabilitation.