I only supplement with ferrous fumarate and nothing else. Symptoms are:
Crippling fatigue
Muscle cramps in legs
Periods flooding my clothes
Hands and feet going so cold they turn white and tingly
Breathlessness
Pins and needles in legs and feet
Carpal tunnel syndrome
Joint aches and pains
Hair loss
Eyebrow loss
Gritty eyes
Clumsiness
Dizziness
Hypertension
Tremor
Swollen legs
Low confidence
Brain fog
Swollen ankles
Puffy eyes
Looking washed out
Ferritin 16 range 15 to 150
Folate 3.6 range 4.6 to 18.7
Vitamin B12 151 range 180 to 900
Total vitamin D 20.3 range below 25 severe vitamin D deficiency. Patient may need pharmacological preparations