if the precipitate re-dissolves completely with gentle warming and shaking, the solution may be usable
This is due to something called bioavailability
Negative effects of a high-fat diet on intestinal permeability: A review (in Eng)

and patients with pernicious anemia who have optic neuropathy COBALAMIN (Vitamin B12) Deficiency Causes Vegetarians (dietary deficiency) Older adults: atrophic gastritis affects 10% 30% and leads to decrease in hydrochloric acid secretion in the stomach and decreased absorption of Vitamin B12 The liver can store up to six years worth of Vitamin B12 so deficiencies are rare Effects of deficiency Megaloblastic anaemia (pernicious anaemia) Progressive demyelination of nerve cells Elevation in levels of circulating homocysteine that leads to production of defective collagen and elastin with a negative impact on arteries, bone and skin Deep vein thrombosis is associated with homocysteinemia that causes the activation of the intrinsic coagulation cascade Symptoms include fatigue, weakness, constipation, loss of appetite and weight loss Numbness, tingling of the feet imbalance, depression, confusion, dementia, poor memory and glossitis

Most users report reduced appetite within the first one to two weeks of treatment
The national drug laboratory will now have to answer the question the strips cannot: Is this actually fentanyl, a precursor setting off the tests, or a 5-Amino-1MQ causing one very alarming false positive after another?