Chunk lemons, removing as many seeds as possible. Put lemons, juice, Vitamin C, turmeric, protein powder, vanilla, and salt in blender - liquefy as much as possible. Place cloth over strainer and pour in mixture. Strain, squeezing it thru cloth, to get all liquid out. Discard pulp. Add sweetener and oil. Refrigerate. Use 3-4 T per glass (large, travel size, about qt size). OR, pour into mini foil muffin cups and freeze. Use 2 to large glass or at jar. Adjust sweetener if needed.