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Function Health vs LDN Doctor: Which Is Better?

Head-to-head comparison of Function Health and LDN Doctor based on our independent scoring across trust, value, experience, product range, and reputation — plus real pricing for the treatments they both offer.

Our Verdict

Function Health scores higher overall in our independent evaluation (76.3/100 vs 60.2/100), leading on trust & safety, value, experience, product range, reputation. LDN Doctor has the lower entry price (from $17/mo vs $49/mo), so the better value depends on which treatment you need.

76

Direct-to-consumer lab testing membership offering 160+ biomarkers twice yearly through Quest Diagnostics, with clinician-reviewed results and action plans.

Visit Function Health
60

LDN Doctor is a small physician practice (H Handler MD Inc) that prescribes low-dose naltrexone by paid video consult, with the medication bought separately from a pharmacy.

Visit LDN Doctor

Score Breakdown

DimensionFunction HealthLDN Doctor
Overall Score76.3/100 ✓60.2/100
Trust & Safety30%78/100 ✓60/100
Value25%80/100 ✓72/100
Experience20%82/100 ✓58/100
Product Range15%60/100 ✓45/100
Reputation10%75/100 ✓58/100

At a Glance

Founded2021—
HeadquartersAustin, TX—
Publicly tradedNoNo
Treatment categories11
Treatments listed21
Starting price$49/mo$17/mo

Pricing Where They Compete

Prices shown are based on our most recent research and may not reflect current pricing. Telehealth providers update their pricing frequently. Always verify pricing directly with the provider before purchasing.

CategoryFunction HealthLDN Doctor
Primary Care$49–$99
At-Home Blood Draw Add-On
$17–$30
Low-Dose Naltrexone Consult + 6-month Rx

Function Health

+Trustpilot rating of 4.5/5 across 2,960 reviews, among the strongest in the diagnostics-membership category
+160+ biomarkers tested twice yearly at 2,000+ Quest locations nationwide, far exceeding a standard annual physical (roughly 20-30 markers)
+Flat, transparent annual pricing ($365/year) visible before any intake or consult
−Reaching live customer support can be slow, per patient reports
−Results depend on Quest blood-draw logistics; a subset of patients report an inconsistent draw experience
−Membership covers testing and clinician-reviewed insights but not ongoing prescribing or treatment for abnormal results
Read the full Function Health review →

LDN Doctor

+Pay-per-visit model with published fees ($220 first visit, $130 returning) and no recurring membership
+Each consult covers a 6-month prescription, keeping the all-in cost near $35–$65/month including pharmacy
+Long-running, LDN-focused practice claiming 10,000+ patients
−All fees are non-refundable, including when the prescriber declines to prescribe LDN
−Prescribers and dispensing pharmacies are not named on the site
−LDN use for autoimmune and pain conditions is off-label, with a limited evidence base
Read the full LDN Doctor review →

Function Health vs LDN Doctor — FAQ

Is Function Health better than LDN Doctor?

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Function Health scores higher overall in our independent evaluation (76.3/100 vs 60.2/100), leading on trust & safety, value, experience, product range, reputation. LDN Doctor has the lower entry price (from $17/mo vs $49/mo), so the better value depends on which treatment you need.

Is Function Health or LDN Doctor cheaper?

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LDN Doctor has the lower starting price (from $17/mo vs $49/mo for Function Health). Starting prices are for the cheapest treatment each offers — compare the specific treatment you need, and check what each price includes.

What do Function Health and LDN Doctor both offer?

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Both platforms treat Primary Care. Function Health covers 1 treatment category total and LDN Doctor covers 1.

Still deciding?

Function Health alternativesLDN Doctor alternativesTake the Match Quiz