No, you do not need to eat only organic foods to be healthy. While organic foods can offer certain benefits, such as being free from synthetic pesticides and fertilizers, they are not necessarily more nutritious than conventionally grown foods.
The most important factor in a healthy diet is to eat a variety of nutrient-dense foods, including fruits, vegetables, whole grains, lean proteins, and healthy fats. These foods can provide the vitamins, minerals, and other nutrients your body needs to function properly.
If you are concerned about pesticide residues in your food, you can choose to buy organic versions of the foods that are most heavily sprayed, such as strawberries, spinach, and apples. However, keep in mind that organic foods can be more expensive and may not be readily available in all areas.
In general, it's important to focus on eating a balanced and varied diet that meets your individual nutrient needs. This can include a mix of organic and conventionally grown foods, as both can be part of a healthy diet.