Understand What 
We Measure – and 
Why It Matters

Vitamin B2, or riboflavin, is a water-soluble vitamin that's essential for general health. It plays a vital role in the digestive system and helps keep your liver, eyes, nerves, muscles, and skin healthy.

Vitamin B6 is a water-soluble vitamin and essential nutrient you need to get through your diet. It supports brain development and helps your nerves and immune system function properly.

Vitamin B9, also known as folate or folic acid, is a water-soluble vitamin that’s found naturally in many foods. It plays a vital role in the formation of DNA and red blood cells and supports brain function.

Vitamin D is a fat-soluble nutrient you can eat and a hormone your body makes in response to sun. It promotes the absorption of calcium and phosphorus from foods to help you build strong bones and teeth.

Zinc is a trace mineral that supports DNA production, the immune system, and metabolism. It’s sometimes called the “beauty mineral” because it's involved in maintaining your skin, nails, and hair.

eGFR, or estimated glomerular filtration rate, is a way of measuring how well your kidneys are filtering waste. It estimates how much blood tiny filters in your kidney called glomeruli can clean every minute based on your body size.

eGFR (cystatin C), or estimated glomerular filtration rate from cystatin C, uses blood cystatin C, age, and sex to assess kidney function. It’s often more sensitive than creatinine and less affected by muscle or diet.

Triiodothyronine (T3) is a thyroid hormone that's important for metabolic health and impacts the entire body. The fT3 test measures levels of unbound T3 in the blood to assess how well the thyroid is working.

Thyroxine (T4) is a thyroid hormone that impacts metabolism, energy levels, reproductive health, and more. The fT4 test measures levels of unbound T4 in the blood to assess thyroid function.

hs-CRP is a protein produced by the liver in response to inflammation. It helps detect low levels of chronic inflammation in the body, which can be an early sign of cardiovascular disease or other health conditions.