diff --git a/personal/mental health/Physiology.md b/personal/mental health/Physiology.md
index 0a4961b..af9349e 100644
--- a/personal/mental health/Physiology.md	
+++ b/personal/mental health/Physiology.md	
@@ -1,4 +1,7 @@
 # Sleep
 A regular sleep schedule is important, consistent, high quality sleep is great for mental health. 
 # Fitness
-Fitness is important, regular fitness, especially if it's getting you outside is important.
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+Fitness is important, regular fitness, especially if it's getting you outside is important.
+
+# The body
+Some common possible contributing factors to low mental health include low vitamin D or B12, or thyroi