Complex sentence: Long-term usage of thiazides is also linked to increased levels of homocysteine, a toxic amino acid byproduct, that has been associated with atherosclerosis but there is no evidence that people receiving long-term thiazide treatments should also receive folic acid supplements.
Split into simpler sentences: Long-term usage of thiazides is also linked to increased levels of homocysteine, a toxic amino acid byproduct that has been associated with atherosclerosis. However, there is no evidence that people receiving long-term thiazide treatments should also receive folic acid supplements.