A patient with Parkinson's disease on Levodopa should:

For a patient with Parkinson's disease on Levodopa, the recommendation to minimize protein intake at breakfast and lunch while adding it to the evening meal is important due to the way protein can interfere with the absorption of the medication. Levodopa is a precursor to dopamine and is used to manage symptoms of Parkinson's disease.

When protein is consumed in high amounts, particularly around the same time as Levodopa, it can compete with the drug for absorption in the gastrointestinal tract. This can lead to reduced effectiveness of the medication, resulting in a fluctuation of symptoms throughout the day.

By minimizing protein intake earlier in the day and reserving higher protein consumption for the evening meal, patients can optimize the efficacy of Levodopa. This strategy allows for better management of symptoms during the day when they are most active, and the evening protein consumption can contribute to satiety and nutrition without compromising medication absorption.

The approach of consuming protein throughout the day or increasing protein at all meals could potentially diminish the therapeutic effects of Levodopa, while avoiding carbohydrates is not necessary and does not directly relate to the medication's absorption. Thus, the recommendation focuses on timing proteins strategically in relation to medication to enhance overall treatment effectiveness.