Key micronutrients
Essential minerals and vitamins-like magnesium and vitamins A, C, K, E, and B-support immune and nervous system health.
Erewhon
The World's Smartest Smoothie?
It's a genuine question.
What does smart actually mean when it comes to what you put in your body? Any smoothie can say it's healthy. Smartest is harder—it demands proof, a method, a standard, a way to show your reasoning.
So that's what we did. Function has run more than 85 million lab tests, building a real picture of what people’s bodies need. We identified the areas of health most commonly out of range. Then we selected 18 ingredients with evidence behind each one. Smartest describes the decisions. Healthiest is what they add up to.
The World’s Smartest Smoothie? is only available at Erewhon locations.
Get a $25 credit toward a Function membership with purchase. First-time members only.
The smartest ingredients in the world.
Each of the 18 ingredients in this smoothie maps directly to a biological system in need—identified across 85 million lab tests. Beets to help support cardiovascular health. Blueberries to help support a healthy inflammatory response. Walnuts to help support cognitive function. Nothing is in here by accident. Every sip has a reason.
1 3
Balanced macros
High-quality protein with leucine helps maintain muscle and keep you feeling full, while omega-3 fats support metabolic health and a healthy inflammatory response.
Glucose index
A measured mix of protein, fiber, fats, and carbohydrates was chosen to support glycemic stability and sustained energy, without the crash you expect from a typical smoothie.
The smartest ingredients in the world.
Each of the 18 ingredients in this smoothie maps directly to a biological system in need—identified across 85 million lab tests. Beets to help support cardiovascular health. Blueberries to help support a healthy inflammatory response. Walnuts to help support cognitive function. Nothing is in here by accident. Every sip has a reason.
Key micronutrients
Essential minerals and vitamins-like magnesium and vitamins A, C, K, E, and B-support immune and nervous system health.
Balanced macros
High-quality protein with leucine helps maintain muscle and keep you feeling full, while omega-3 fats support metabolic health and a healthy inflammatory response.
Glucose index
A measured mix of protein, fiber, fats, and carbohydrates was chosen to support glycemic stability and sustained energy, without the crash you expect from a typical smoothie.
Monitor early indicators of 1000s of diseases
Establish your long-term baseline
Tracked for life
Monitor how your body changes
AnemiaGoutCeliac diseaseAddison's diseaseInsulin resistanceFatty liver diseasePancreatic cancerOvarian cancerSickle cell diseaseSjögren's syndromeDiabetesRheumatoid arthritisMold toxicity
HypogonadismLupusCoronary artery diseaseHypothyroidismAlzheimer's diseaseHemochromatosisPCOSChronic kidney diseaseHashimoto's thyroiditisProstate cancerLead toxicityGraves' disease
160+ lab tests chosen by top doctors
“The most powerful approach I’ve seen in my career. Uncompromising depth with no shortcuts.”
Hormones & thyroid
16 Biomarkers
- Thyroxine (T4) Free
- Thyroglobulin Antibodies (TgAb)
- Testosterone, Total
- Anti-Mullerian Hormone
- Thyroid-Stimulating Hormone (TSH)
Cancer & other silent risks
34 Biomarkers
- Galleri® Multi-Cancer Test
- Prostate Specific Antigen (PSA), Total
- Rheumatoid Factor (RF)
- Mercury
Heart & metabolic
18 Biomarkers
- LDL Small
- Lipoprotein (a)
- Apolipoprotein B (ApoB)
- Omega-3 Total
- Insulin
Aging
34 Biomarkers
- Sex Hormone Binding Globulin (SHBG)
- DHEA-Sulfate
- Insulin-like Growth Factor (IGF-1)
- Homocysteine
- Vitamin D
Mental health & focus
20 Biomarkers
- Cortisol
- High-Sensitivity C-Reactive Protein (hs-CRP)
- Iron
- Ferritin
- Methylmalonic Acid (MMA) (B12 Proxy)
Function like Emeline
The silent threat of mercury toxicity
Function like Fernando
The deeper issue beneath my fatigue
Function like Holly
Finally finding the source of fatigue
Function like Alan
From diabetes diagnosis to action
Gold standard testing, on your schedule
Labs trusted by the medical community. Test at 2000+ Quest locations nationwide, or schedule an at-home blood draw with a licensed specialist.
Over 75 million results delivered to Function members
75M+
75M+
2,000+ lab test locations across the US
2,000+
2,000+
Or we’ll come to you—have a licensed specialist come to your home or office.
Not your average checkup
Standard checkup
160+
Lab tests annually
~26
Personalized action plan
Upload past results
No insurance needed
Every 6 months
Hormones & fertility testing
Heavy metal & toxin testing
Metabolic & pancreatic testing
Heart testing beyond cholesterol
Nutrient/electrolyte testing
Autoimmunity testing
Thyroid testing
Access to MRI & CT
Access to Galleri® Multi-Cancer Test
Access to Alzheimers & brain testing
Access to mold reactivity testing
Standard checkup
Lab tests annually
160+
~26
Personalized action plan
Upload past results
No insurance needed
Every 6 months
Hormones & fertility testing
Heavy metal & toxin testing
Metabolic & pancreatic testing
Heart testing beyond cholesterol
Nutrient/electrolyte testing
Autoimmunity testing
Thyroid testing
Access to MRI & CT
Access to Galleri® Multi-Cancer Test
Access to Alzheimers & brain testing
Access to mold reactivity testing
What could cost you $15,000 is $340
Your health shouldn’t depend on insurance.
- 160+ lab tests annually
- Testing 2x/year and on-demand
- Insights from top doctors and researchers
- All-in-one for your whole body
- Tracked in one secure place
- Clinicians review every result and flag issues
- Personalized protocol for instant action
- Add MRI and CT scans anytime
- No insurance, transparent pricing
Function blows my mind. The experience, price, and clinician notes are all phenomenal.
This is the most comprehensive lab testing I have ever had. I am thrilled to know more about my health and how to improve it.
Best money I have spent on healthcare.
Frequently asked questions
What is Function?
Function is a membership that gives you access to 160+ lab tests, doctor-reviewed insights, and a personalized health plan so you can understand your results and take action over time.
Why 160+ lab tests?
Anything less could miss critical parts of your health. Typical physicals tend to focus on conventional standards—and what insurance will cover. This broader view can give you key insights to take action sooner.
Which tests are included with a Function membership?
Members get access to 160+ lab tests annually, covering heart, hormones, thyroid, liver, and kidneys, as well as potential heavy metal exposures, nutrient levels, inflammation, potential cancer signals, and more. See all that's included here.
Is Function FSA/HSA eligible?
Yes—check with your plan to confirm eligibility. Members receive an itemized receipt to submit for reimbursement.
Is the smoothie available at all Erewhon locations?
The smoothie is available in all Los Angeles Erewhon locations.