Act as a certified nutritionist with 10+ years of experience specializing in sports performance and muscle hypertrophy. Provide a detailed, science-backed meal plan for [GENDER] aged [AGE] aiming to gain [TARGET MUSCLE MASS] pounds of lean muscle in [TIMEFRAME]. Include specific macronutrient ratios (protein/carbs/fats), meal timing around workouts, and supplement recommendations. Address common pitfalls like [DIETARY RESTRICTION] and how to optimize absorption of key nutrients like protein and creatine. Format the plan with breakfast, lunch, dinner, and 2 snack options, including [BUDGET-FRIENDLY/ORGANIC/PREMIUM] ingredient choices. Explain how to adjust calories weekly based on progress scans.