Marco (Godolphin Arabian), sire of Grand National winner Sprig, sire-line grandsire of top National Hunt sire My Prince (sire of 3 Grand National winners and Cheltenham specialist Easter Hero), and broodmare sire of leading National Hunt sire Cottage (sire of 3 Grand National winners), the latter also broodmare sire of Holstein founder Cottage Son.
Vitamin B12 Deficiency Symptoms. Fatigue is a major part of B12 deficiency symptoms (that run down feeling). Excessive breathing during normal activity or light exercise (your out of breath)-when you are low on B12 you need more oxygen in your system to run metabolic pathways hence the extra breathing. Heart arrhythmia.
Vitamin B-9 also aids in the continual cell growth needed to give rise to new red blood cells, because it helps you metabolize proteins and DNA. A deficiency in either vitamin B-12 or vitamin B-9 can cause pernicious anemia, which can cause a rapid heart rate, weight loss, irritability and fatigue. Your diet should include 2.4 micrograms of vitamin B-12 and 400 micrograms of vitamin B-9 each day to prevent a deficiency.