&lt;h2&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;OVERVIEW&lt;/strong&gt;&lt;/span&gt;&lt;/h2&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Folate includes all forms of folic acid derivatives, with serum folate primarily being N-(5)-methyl tetrahydrofolate. Approximately 20% of daily folate intake comes from the diet, while the rest is synthesized by gut microbes. Serum folate levels decline rapidly with reduced dietary intake, impacting tissue reserves. Folate deficiency can lead to macrocytosis, megaloblastic anemia, and is associated with neuropsychiatric disorders, neural tube defects, and spontaneous abortions. It is particularly common in pregnant women and individuals with alcohol dependence due to insufficient intake or increased utilization, as seen in conditions like liver disease, hemolytic disorders, and cancers.&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;hr /&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;METHOD NAME&lt;/span&gt;&lt;br /&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Competitive-Binding Receptor Assay&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;AVAILABILITY&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;TBC&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;REPORTING NAME&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Folate, S&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;ALIASES&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Folate, Serum&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Folic Acid&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Pteroylglutamic Acid&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Folate and Vitamin B12 (Order FB12)&lt;/span&gt;&lt;/p&gt;

&lt;h3&gt;&amp;nbsp;&lt;/h3&gt;
&lt;h3 id=&quot;SpecimenType-title&quot;&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;&lt;strong&gt;SPECIMEN TYPE&lt;/strong&gt;&amp;nbsp;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Serum&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;&lt;span style=&quot;color: #ff99cc;&quot;&gt;SHIPPING INSTRUCTIONS&lt;/span&gt;&lt;br /&gt;&lt;/strong&gt;&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;TBC&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;h3&gt;&lt;strong style=&quot;color: #ff99cc;&quot;&gt;SPECIMEN REQUIRED&lt;/strong&gt;&lt;/h3&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Patient preparation:&lt;/strong&gt;&lt;/span&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Patient should be fasting for 8 hours.&lt;/span&gt;&lt;/li&gt;
&lt;li style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Do not order&lt;/strong&gt;on patients who have recently received methotrexate or other folic acid antagonists.&lt;/span&gt;&lt;/li&gt;
&lt;/ul&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Collection Container/Tube:&lt;/strong&gt;&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Preferred:&amp;nbsp;&lt;/strong&gt;Serum gel&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Acceptable:&amp;nbsp;&lt;/strong&gt;Red top&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Submission Container/Tube:&amp;nbsp;&lt;/strong&gt;Plastic vial&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Specimen Volume:&lt;/strong&gt;0.6 mL&lt;/span&gt;&lt;/p&gt;
&lt;p style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;&lt;strong&gt;Collection Instructions:&lt;/strong&gt;&lt;/span&gt;&lt;/p&gt;
&lt;ul&gt;
&lt;li style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Serum gel tubes should be centrifuged within 2 hours of collection.&lt;/span&gt;&lt;/li&gt;
&lt;li style=&quot;font-weight: 400;&quot;&gt;&lt;span style=&quot;color: #99ccff;&quot;&gt;Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.&lt;/span&gt;&lt;/li&gt;
&lt;/ul&gt;

Lysosomal and Peroxisomal Disorders Screen, Blood Spot

Lysosomal Storage Disease Gene Panel, Varies