Could hypochlordydia cause deficienty in v-d, b12, l protein, l platelet count , osteopenia, hypoalbuminemia and feeling like death warmed over?

Partial cause: Hypochlorhydria causes problems digesting protein, which could lead to low protein/albumin & difficulty absorbing minerals leading to osteopenia (low vit d causes this too). Won't cause low platelets or d but may cause imbalances of flora & could reduce B12 absorption. These problems can make you feel poorly but look for other causes like low thyroid, parasites (common with hypochlorhydria) etc.