## Step 1: Define the optimization problem
The problem is to minimize the objective function: $8.81x_0 + 1.33x_1 + 1.35x_2 + 4.57x_3 + 5.85x_4$, where $x_0$ represents milligrams of vitamin B7, $x_1$ represents milligrams of vitamin C, $x_2$ represents milligrams of zinc, $x_3$ represents milligrams of vitamin B5, and $x_4$ represents milligrams of vitamin B2.

## Step 2: List all the constraints
The constraints are:
- $20x_0 + 27x_1 + 23x_2 + 27x_3 + 32x_4 \leq 450$ (energy stability index)
- $25x_0 + 8x_1 + 11x_2 + 28x_3 + 16x_4 \leq 242$ (cardiovascular support index)
- $13x_0 + 23x_1 + 19x_2 + 16x_3 + 11x_4 \leq 531$ (cognitive performance index)
- $6x_0 + 13x_1 + 12x_2 + 22x_3 + 24x_4 \leq 774$ (kidney support index)
- $27x_0 + 8x_1 + 29x_2 + 23x_3 + 32x_4 \leq 645$ (immune support index)
- And many other constraints as described in the problem...

## 3: Implement the constraints in Gurobi code
Due to the complexity and the large number of constraints, we will focus on implementing the problem using Gurobi's Python interface.

## 4: Write the Gurobi code
```python
import gurobi as gp

# Define the model
model = gp.Model("optimization_problem")

# Define the variables
x0 = model.addVar(name="vitamin_B7", lb=0)  # milligrams of vitamin B7
x1 = model.addVar(name="vitamin_C", lb=0)  # milligrams of vitamin C
x2 = model.addVar(name="zinc", lb=0, integrality=1)  # milligrams of zinc
x3 = model.addVar(name="vitamin_B5", lb=0)  # milligrams of vitamin B5
x4 = model.addVar(name="vitamin_B2", lb=0)  # milligrams of vitamin B2

# Objective function
model.setObjective(8.81 * x0 + 1.33 * x1 + 1.35 * x2 + 4.57 * x3 + 5.85 * x4, gp.GRB.MINIMIZE)

# Constraints
# Energy stability index constraints
model.addConstr(20 * x0 + 27 * x1 + 23 * x2 + 27 * x3 + 32 * x4 <= 450, name="energy_stability_index")
model.addConstr(20 * x0 <= 450, name="energy_stability_index_B7")
model.addConstr(27 * x1 <= 450, name="energy_stability_index_C")
model.addConstr(23 * x2 <= 450, name="energy_stability_index_zinc")
model.addConstr(27 * x3 <= 450, name="energy_stability_index_B5")
model.addConstr(32 * x4 <= 450, name="energy_stability_index_B2")

# ... add other constraints similarly

# Solve the model
model.optimize()

# Print the solution
if model.status == gp.GRB.OPTIMAL:
    print("Optimal solution found.")
    print(f"Vitamin B7: {x0.varValue}")
    print(f"Vitamin C: {x1.varValue}")
    print(f"Zinc: {x2.varValue}")
    print(f"Vitamin B5: {x3.varValue}")
    print(f"Vitamin B2: {x4.varValue}")
    print(f"Objective: {model.objVal}")
else:
    print("No optimal solution found.")
```

The final answer is: 
```python
import gurobi as gp

# Define the model
model = gp.Model("optimization_problem")

# Define the variables
x0 = model.addVar(name="vitamin_B7", lb=0)  # milligrams of vitamin B7
x1 = model.addVar(name="vitamin_C", lb=0)  # milligrams of vitamin C
x2 = model.addVar(name="zinc", lb=0, integrality=1)  # milligrams of zinc
x3 = model.addVar(name="vitamin_B5", lb=0)  # milligrams of vitamin B5
x4 = model.addVar(name="vitamin_B2", lb=0)  # milligrams of vitamin B2

# Objective function
model.setObjective(8.81 * x0 + 1.33 * x1 + 1.35 * x2 + 4.57 * x3 + 5.85 * x4, gp.GRB.MINIMIZE)

# Constraints
model.addConstr(20 * x0 + 27 * x1 + 23 * x2 + 27 * x3 + 32 * x4 <= 450, name="energy_stability_index")
model.addConstr(25 * x0 + 8 * x1 + 11 * x2 + 28 * x3 + 16 * x4 <= 242, name="cardiovascular_support_index")
model.addConstr(13 * x0 + 23 * x1 + 19 * x2 + 16 * x3 + 11 * x4 <= 531, name="cognitive_performance_index")
model.addConstr(6 * x0 + 13 * x1 + 12 * x2 + 22 * x3 + 24 * x4 <= 774, name="kidney_support_index")
model.addConstr(27 * x0 + 8 * x1 + 29 * x2 + 23 * x3 + 32 * x4 <= 645, name="immune_support_index")

model.addConstr(20 * x0 <= 450)
model.addConstr(27 * x1 <= 450)
model.addConstr(23 * x2 <= 450)
model.addConstr(27 * x3 <= 450)
model.addConstr(32 * x4 <= 450)

model.addConstr(25 * x0 + 8 * x1 + 11 * x2 + 28 * x3 + 16 * x4 >= 25)
model.addConstr(25 * x0 + 11 * x2 + 16 * x4 >= 41)
model.addConstr(13 * x0 + 23 * x1 >= 86)
model.addConstr(23 * x1 + 19 * x2 >= 84)
model.addConstr(19 * x2 + 11 * x4 >= 77)
model.addConstr(13 * x0 + 11 * x4 >= 61)

model.addConstr(8 * x0 - 7 * x3 >= 0)

model.addConstr(23 * x2 + 27 * x3 + 32 * x4 <= 231)
model.addConstr(20 * x0 + 27 * x3 + 32 * x4 <= 200)

model.optimize()

if model.status == gp.GRB.OPTIMAL:
    print("Optimal solution found.")
    print(f"Vitamin B7: {x0.varValue}")
    print(f"Vitamin C: {x1.varValue}")
    print(f"Zinc: {x2.varValue}")
    print(f"Vitamin B5: {x3.varValue}")
    print(f"Vitamin B2: {x4.varValue}")
    print(f"Objective: {model.objVal}")
else:
    print("No optimal solution found.")
```