For the full-body blood panel at GIOSTAR, you fast 8 to 12 hours, drink plain water only, and book an early morning draw at a Quest location near you. A few more habits, covering supplements, medications and clothing, make the draw quick and the results easy to compare.
This guide walks through each step in the order you do them, from the night before to the minutes after the needle comes out.
Why preparation matters for a blood test
A blood test reads what is in your blood at one moment. Food, drink, supplements and the time of day can all change some of the numbers. Preparing well means the numbers reflect your usual baseline, and your nurse practitioner can compare this panel with the next one on equal terms.
Many people repeat the panel every 3 to 6 months, and the same routine each time keeps those draws comparable.
Fasting: how long and what counts
Fast 8 to 12 hours before your draw. Drink plain water only. Coffee, even black, changes some results, so skip it until after the draw.
Plan your evening
If you book an 8 a.m. draw, your last meal is somewhere between 8 p.m. and midnight the night before. Most people finish dinner, then stay with water until the appointment. Water is encouraged: drink extra water the evening before, because it makes the draw easier.
Bring a snack
Bring something to eat afterward. Eating the snack you brought helps if you feel a little lightheaded once the draw is done.
Timing: book an early morning slot
Book an early morning appointment at a Quest location near you. There are many across the Las Vegas valley, and the draw itself takes only a few minutes. A morning slot makes fasting easy, since most of the fasting window is spent asleep.
Your nurse practitioner orders the panel first. After that, you book your draw. Results come back in about a week, and your nurse practitioner walks you through every marker.
Medicines and supplements before a blood test
Prescribed medicines
Stay on prescribed medicines unless your provider tells you otherwise. Never stop a prescription on your own because a test is coming up.
Testosterone and other hormones
For testosterone or other hormones, ask us when to take your dose, because timing changes the reading. This is one of the questions to settle at your consultation, well before draw day.
Biotin
Pause biotin for 72 hours before your draw unless your provider tells you otherwise. Biotin is common in hair, skin and nail supplements and in many multivitamins, and it can skew some results. Check the label of anything you take daily.
Other things to tell us
Tell us if you are pregnant, or take birth control, hormones or a blood thinner. Bring a full list of every medication and supplement to your visit, so your nurse practitioner can plan around them.
What to wear and what to expect on draw day
Wear short sleeves or a loose sleeve, so the person drawing blood can reach your arm easily.
Expect a quick draw, with a pinch as the needle goes in. Afterward, press on the site for a few minutes and eat the snack you brought. If needles make you woozy, tell the Quest team when you arrive and ask to lie back for the draw.
What is normal afterward
A small bruise that fades in a few days is common, and so is feeling a little lightheaded until you eat. Call us any time at 702.703.5393. Call right away if the site keeps bleeding after 10 minutes of pressure or your arm turns swollen, hot or more painful.
Small mistakes that change a draw
Most problems on draw day are small and easy to avoid.
- Black coffee. It feels like nothing, and it still changes some results. Water only.
- Skipping water. Plain water is welcome, and a hydrated arm is easier to draw from.
- Forgetting the supplement bottle. Biotin hides in hair, skin and nail products and in many multivitamins. Read the label the night before.
- Changing your routine on your own. Do not stop a prescription because a test is coming. Ask us first.
- Arriving late in the day. A late slot stretches the fast, so book the earliest time you can manage.
If you slip on any of these, tell your nurse practitioner when you review results. Context helps them read the numbers.
Why the same blood test routine each time helps
Your first panel sets a baseline. When you repeat it, your provider tells you which markers to recheck and when, and the next draw compares like for like if you prepare the same way. Pick a morning that suits you, keep the same fasting window and take supplements the same way each time. Over several draws, that routine is what makes your numbers readable side by side.
A quick blood test checklist
- Order of events: free consultation, nurse practitioner visit, panel ordered, draw booked.
- The night before: finish eating 8 to 12 hours before the draw, drink extra water.
- Morning of: plain water only, short sleeves, pause biotin if you take it.
- After: press on the site, eat your snack, expect results in about a week.
What the panel covers
In general, a panel like this looks at hormones, metabolic markers such as blood sugar, thyroid markers, lipids, vitamins and minerals, and blood counts and organ function markers. Your nurse practitioner confirms which markers are right for you. For more on what each group measures, read what a full-body blood panel measures.
Blood testing at GIOSTAR in Henderson
GIOSTAR stands for Global Institute of Stem Cell Therapy and Research. At our Henderson wellness center, now open at 2482 W. Horizon Ridge Pkwy, Ste 100, a nurse practitioner orders your full-body blood panel and goes through every marker with you once results are in. Dr. Ryan Peterson, our Medical Director, oversees care. Learn more about blood testing at GIOSTAR, or start with a free consultation with our patient team.
