If you’re here, then you probably Google’d: vitamin d 3 levels. This subject along with many others are quite common.
Symptoms And Health Risks Of Vitamin D Deficiency
Yet, even without symptoms, too little vitamin D can pose health risks.
Reference Range
Rincipal forms of vitamin D: D2 and D3. Many of the currently available assays measure and report on both vitamin D2 and D3 metabolites.
25-hydroxyvitamin D (25(OH)D) is the major circulating form of vitamin D; thus, the total serum 25(OH)D level is currently considered the best indicator of vitamin D supply to the body from cutaneous synthesis and nutritional intake.
What Is Vitamin D?
Vitamin D is a fat-soluble vitamin that’s involved in many essential body functions. Vitamin D3 (cholecalciferol): found in oily fish, fish liver oil, and egg yolks.
D3 is the more powerful of the two types and raises vitamin D levels almost twice as much as D2 Significant amounts of vitamin D can also be made in your skin when exposed to UV rays from sunlight. Any excess vitamin D is stored in your body fat for later use.
1. Elevated Blood Levels
Hypervitaminosis D is defined as blood vitamin D levels over 100 ng/mL, while vitamin D intoxication is defined as serum levels over 150 ng/mL For example, in a 2020 case report, a 73-year-old man developed vitamin D toxicity after taking 10,000 IU of vitamin D per day for many years In another 2020 case report, a 56-year-old woman who took an average of 130,000 IU of vitamin D per day for 20 months in hopes of improving symptoms of multiple sclerosis was hospitalized for symptoms including nausea, vomiting, and muscle weakness.
Her vitamin D levels were discovered to be 265 ng/mL Keep in mind that people who are low or deficient in vitamin D typically need to take much higher levels than the current Tolerable Upper Intake Level (UL) of 4,000 IU per day to reach and maintain optimal vitamin D levels. Toxicity symptoms have been reported at extremely high blood levels in cases where people took megadoses (very high doses) of vitamin D supplements for extended periods of time.