Is Collagen HSA/FSA Eligible? Yes, Here's How!

Why collagen qualifies for HSA/FSA

Collagen's eligibility comes down to one thing: a medical recommendation. A practitioner recommends collagen as treatment for a specific health condition, and your Letter of Medical Necessity (LMN) records that recommendation.

IRS Publication 502 includes the “diagnosis, cure, mitigation, treatment, or prevention of disease” in its definition of medical expenses. Its Nutritional Supplements entry counts supplements as medical expenses when they are recommended by a medical practitioner as treatment for a specific medical condition diagnosed by a physician.

Collagen powder and peptides are supplements, so they follow that rule. Tub, pouch, or single servings, your LMN ties them to your condition the same way.

Do collagen supplements work?

Yes, research has found benefits for specific uses, including knee osteoarthritis pain. A 2023 meta-analysis of four trials involving 507 patients found that collagen peptides reduced knee osteoarthritis pain compared with placebo.

Collagen is a protein your body uses like scaffolding in your bones, muscles, and connective tissues. Supplements often contain peptides, also called hydrolyzed collagen: collagen broken into smaller pieces that are easier to absorb, as Cleveland Clinic explains. Studies test particular supplements for particular results, like joint pain or bone density, and those are the uses a medical recommendation is built on.

Which conditions can support a collagen LMN?

A provider can document collagen for a condition affecting your joints, bones, tendons, or muscles. Here are four of the common ones, each with clinical research behind it:

• Knee osteoarthritis. Here the goal is simple: less pain. The knee osteoarthritis meta-analysis found lower pain scores in patients taking collagen peptides than in those taking placebo.
• Low bone density after menopause, including osteopenia. Collagen peptides have been studied for improving bone mineral density. A 12-month trial in postmenopausal women with reduced bone density found improvements at the lumbar spine and femoral neck, your lower back and hip, with specific collagen peptides compared with placebo.
• Achilles tendinopathy. Collagen supplementation has been studied alongside exercises that load the tendon. A systematic review of nutrition and tendinopathy included a 20-person Achilles study. In it, specific collagen peptides plus calf exercises improved tendon symptom and function scores.
• Sarcopenia. This condition involves loss of muscle mass and strength. A systematic review of collagen supplementation reported on older men with sarcopenia doing resistance training. Those who added collagen peptides gained more fat-free mass and muscle strength than those who added a placebo.

If your condition isn't one of these four, collagen counts just as well when your provider documents it for the condition you do have.

How to get a Letter of Medical Necessity for collagen

There are two ways to get your letter: through Crates or through your own doctor.

• Through Crates, typically in under 24 hours. Set aside about 2 to 3 minutes to complete the short online health assessment. A licensed provider reviews it, and if you qualify, your letter is issued for collagen. The letter is valid for 12 months and renews each year.
• Through your own doctor, a few days to a few weeks. Book a visit and explain that you want to use HSA/FSA funds for collagen. Ask them to document how collagen helps manage your condition in a signed, dated letter; you could owe a copay for that appointment.

How to buy collagen with HSA/FSA funds

Buy collagen wherever you like, online or in a store, then get your money back with the receipt:

1. Get your LMN first. Use whichever route above suits you.
2. Buy collagen anywhere. Pay with your personal card and keep the itemized receipt showing the supplement, purchase date, and amount paid. For a mixed shopping basket, keep the collagen line visible.
3. Get your money back. Have Crates file your claim through one-click reimbursement, or upload the letter and receipt yourself; for an HSA purchase, keep the supplement receipt and letter with your tax records.

Our HSA vs FSA guide explains the account differences and reimbursement records.

Which collagen supplements are eligible?

Brand and format are your call; eligibility doesn't hinge on either. Peptides are the ingredient and powder is the form, so one tub can be both.

Marine describes the source, so marine collagen can also come as peptide powder. Liquids and gummies are other formats. Cleveland Clinic’s collagen peptide guide explains sources, forms, and quality checks, including third-party testing.

For that brand’s products and buying details, see our Vital Proteins HSA/FSA guide. Any brand follows the same rule: collagen is a protein supplement, so it qualifies through your letter.

For other ingredients in your routine, our vitamins and supplements guide covers the broader category. If vitamin D is part of your bone-health plan too, our vitamin D eligibility guide covers it.

How much can you save on collagen?

Since HSA/FSA money isn't taxed, collagen bought with it costs as much as 30% less. At $30 a month, for example, you'd spend $360 a year. With about 30% in combined taxes, $108 of that stays in your pocket. The combined rate includes federal, state, and payroll taxes where applicable to your contributions.

These annual spending amounts are examples, not current product offers. Each column multiplies the purchase price by the illustrated tax rate:

The store charges you the same price either way; the savings come from the tax breaks on your HSA/FSA money. Reimbursement uses your own account money. The real figure turns on your own taxes and how you contribute, and any provider or LMN fee is a separate cost.