Shaky legs, failing eyesight, and toothless gums are certainly not what God originally purposed for mankind.
وَلكِنَّ ٱللهَ لَمْ يَخْلُقِ ٱلْإِنْسَانَ لِيَصِلَ إِلَى هذِهِ ٱلْحَالَةِ :‏ أَقْدَامٌ مُرْتَعِشَةٌ ،‏ بَصَرٌ ضَعِيفٌ ،‏ وَفَمٌ خَالٍ مِنَ ٱلْأَسْنَانِ .‏