FAQs
Answers to common questions about the benefits of oxaloacetic acid, contained in Oxaloaceate CFS.
About Your Order
How long does it take to receive my order?
Shipping Information
United States and Non EU International Orders
Orders are fulfilled from our warehouse in Oklahoma, USA.
Orders shipped within the United States are sent via USPS Priority Mail and typically arrive within 2 to 3 business days.
International orders may take up to 2 weeks for delivery, depending on customs processing times in the destination country.
We offer free shipping worldwide, with the exception of Australia and New Zealand, where a flat shipping fee of $20 USD applies per order.
European Union Orders
All orders shipping to countries within the European Union are fulfilled from our warehouse in the Netherlands. EU customers only need to pay VAT at checkout and will not be charged additional duties or import taxes upon delivery.
Please note that for countries outside the European Union, customs duties, import taxes, and other fees are not included in the purchase price and are the responsibility of the recipient.
International Shipments
Shipping Information
We offer free shipping worldwide, with the exception of Australia and New Zealand, where a flat shipping fee of $20 USD applies per order.
European Union Orders
All orders shipping to countries within the European Union are fulfilled from our warehouse in the Netherlands. EU customers only need to pay VAT at checkout and will not be charged additional duties or import taxes upon delivery.
United States and International Orders
All other orders are fulfilled from our warehouse in Oklahoma, USA.
Orders shipped within the United States are sent via USPS Priority Mail and typically arrive within 2 to 3 business days.
International orders may take up to 2 weeks for delivery, depending on customs processing times in the destination country.
Please note that for countries outside the European Union, customs duties, import taxes, and other fees are not included in the purchase price and are the responsibility of the recipient.
What is the Oxaloacetate CFS return policy?
Oxaloacetate CFS offers a 100% money-back guarantee for every customer’s FIRST bottle. If you find that Oxaloacetate CFS isn’t for you, just let us know through our contact page, and we will issue a full refund of your FIRST bottle (not your FIRST order; your FIRST bottle).
No need to mail back the bottle.
Please note:
- Refund requests must be made within 150 days of purchase to qualify.
- We do not compensate for return shipping or international postage/charges (Customs and Duties).
- We cannot accept returns of bottles due to our strict Quality Assurance/Quality Control (QA/QC) standards.
Eligible refunds will be initiated to the original payment method within one business day of approval. Requests received on weekends or holidays will be processed the following business day. After the refund is initiated, please allow up to 10 business days for your bank or card provider to post the funds to your account.
How do I track my shipment?
We include a tracking number with your order details once your order has been processed. If you still need help, please contact us through our contact page.
About HSA/FSA Payments
What are HSA and FSA accounts?
Health savings accounts (HSA) and flexible spending accounts (FSA) are programs that allow you to set aside pre-tax dollars for eligible healthcare expenses. OAA CFS has partnered with Truemed to allow you to use your HSA or FSA dollars on eligible products. If you’re unsure whether or not you have an HSA or FSA account, please check with your insurance company or employer
How do I qualify to use my HSA/FSA funds through Truemed?
To use your HSA or FSA funds through Truemed, select the “Pay with HSA/FSA funds” option during checkout. You’ll then be redirected to Truemed’s website to complete a brief health questionnaire about whether you are seeking to prevent, manage, or treat a chronic medical condition.
After submitting the survey, you can enter payment information using either your HSA/FSA card, a credit card, or a debit card to finalize your purchase. A licensed healthcare provider will review your responses after checkout, and if you are eligible, Truemed will issue a Letter of Medical Necessity (LMN) for your records.
If you do not meet the qualification requirements, you may cancel your order any time before it ships. Eligible cancellations made prior to delivery will be refunded directly through Truemed.
What is Truemed?
Truemed works with health and wellness brands to help eligible customers pay for qualifying products using pre-tax HSA or FSA funds. Through its network of licensed medical providers, Truemed can issue Letters of Medical Necessity (LMNs) to customers who qualify, making certain wellness purchases eligible for HSA/FSA reimbursement when deemed medically necessary.
For additional details, customers can contact Truemed directly at support@truemed.com
What if I don’t have my FSA/HSA card?
If you don’t have an HSA or FSA card, you may still be able to complete your eligible OAA CFS purchase using a regular credit or debit card through the Truemed checkout process, pending approval. After filling out Truemed’s health intake survey, you can submit your payment directly through Truemed.
If approved, Truemed will send you a Letter of Medical Necessity (LMN) along with instructions for requesting reimbursement from your HSA/FSA administrator. To receive reimbursement, you’ll need to provide both your LMN and your Peloton purchase receipt to your plan administrator.
If you are not approved, you may cancel your order at any point before delivery. Approved cancellations made prior to shipment will be refunded through Truemed.
For additional assistance, contact support@truemed.com.
Can I use Truemed pay with my HSA/FSA funds if I don’t have enough in the HSA/FSA Account?
Yes. Truemed offers a Split Pay option, which allows you to combine multiple payment methods for the same purchase. This gives you the flexibility to pay with both your HSA/FSA funds and another payment method if your account balance does not fully cover the order total.
Subject to approval, you may also choose to pay the full amount using a credit or debit card through Truemed and later request reimbursement from your HSA/FSA administrator for the portion covered by your available HSA/FSA balance. After completing Truemed’s health intake survey, you can finalize your payment through the Truemed checkout process.
If you qualify, Truemed will issue a Letter of Medical Necessity (LMN) and provide instructions for submitting a reimbursement request to your HSA/FSA plan administrator. To request reimbursement, you’ll need to provide both your LMN and your Peloton purchase receipt.
If you are not approved, you may cancel your order at any time before delivery. Any valid cancellation made prior to shipment will be refunded through Truemed.
For additional information, contact support@truemed.com.
How can using a HSA/FSA account save me 30%?
Using your HSA or FSA funds can help you save money because those accounts are funded with pre-tax dollars. This means you do not pay federal income tax—and in many cases state income tax—on the money contributed to your account, as long as it is used for eligible medical expenses within IRS guidelines.
Depending on your individual federal and state tax rates, these tax savings can add up to as much as 30%. Your actual savings will vary based on your annual taxable income and applicable tax bracket.
About the Product
What is oxaloacetate?
Oxaloacetate is a metabolic compound needed by nearly every human cell to produce energy in the mitochondria via Krebs cycle. Proper levels of oxaloacetate are crucial for healthy metabolism, glucose system support, and overall cellular function.
What are the ingredients in Oxaloacetate CFS?
Oxaloacetate CFS™ is formulated with minimal ingredients for purity and simplicity.
Active Ingredient
- 500 mg Anhydrous Enol-Oxaloacetate
A thermally stabilized form of oxaloacetate designed for oral supplementation.
Other Ingredients
- Vegetarian capsule (hypromellose)
What’s NOT Included
Oxaloacetate CFS™ contains:
- No fillers
- No flow agents
- No dyes
- No gluten
- No preservatives
Each bottle contains 90 vegetarian capsules.
Why does Oxaloacetate CFS cost $499?
We understand that many people with ME/CFS are already carrying enormous physical, emotional, and financial burdens. Cost matters deeply, and we want you to know that lowering the price of Oxaloacetate CFS is one of our highest priorities.
Oxaloacetate is unusually difficult to manufacture and stabilize at therapeutic medical food doses. Producing pharmaceutical-grade oxaloacetate requires a highly specialized process involving:
- More than ten international patents covering production and stabilization methods
- Multiple manufacturing stages at sub-zero temperatures
- Specialized handling to preserve stability and effectiveness
- Extensive quality control and testing
Unlike many common supplements, oxaloacetate is naturally unstable and breaks down easily if not carefully processed and protected throughout production.
Nonetheless, we are doing everything we can to reduce costs over time. As awareness grows and production volume increases, we expect manufacturing efficiencies to improve substantially. Our goal is to make Oxaloacetate CFS as accessible and affordable as possible for the ME/CFS community.
We know many people with ME/CFS face intense financial hardship, and we take that seriously.
That said, when comparing cost per milligram, Oxaloacetate CFS is still less expensive than smaller-dose oxaloacetate products from Terra Biological, such as benaGene.
What is the difference between Oxaloacetate CFS and benaGene?
While benaGene is a dietary supplement, Oxaloacetate CFS is a medical food, a classification distinct from dietary supplements. Additionally, benaGene contains 150 mg of Vitamin C per capsule, whereas Oxaloacetate CFS contains no Vitamin C.
Although both benaGene and Oxaloacetate CFS contain thermally stabilized oxaloacetate, they fall under different regulatory classifications with important differences.
Dietary supplements provide supplementary nutritional support for healthy people and are intended to affect the normal structure or function of the human body.
Medical foods, like Oxaloacetate CFS, provide support for the nutritional management of a specific disease or condition that has distinct and established nutritional requirements. Importantly, they are always to be used only under the supervision of a licensed healthcare provider. While no prescription is needed for Oxaloacetate CFS, your doctor should help you set your individual dosing levels.
Medical foods support those who have trouble digesting and absorbing food and certain nutrients and cannot nutritionally manage their condition through diet modification alone. While oxaloacetate is naturally available in our diet, it is not found in sufficient amounts to help most ME/CFS patients.
How much oxaloacetate is in Oxaloacetate CFS?
Each capsule of Oxaloacetate CFS contains 500 mg of Anhydrous Enol-Oxaloacetate (AEO)—our highest-dose formula, developed specifically for individuals with ME/CFS and Long COVID.
Is Oxaloacetate CFS's oxaloacetate different from oxalate?
The active ingredient in Oxaloacetate CFS is thermally stabilized oxaloacetate—“Anhydrous enol-Oxaloacetate”. While oxaloacetate in the English language sounds very similar to “oxalate,” the two compounds are chemically quite different. Oxaloacetate is a 4-carbon molecule, whereas oxalate is a 2-carbon molecule. Oxaloacetate CFS contains zero oxalates. In human beings, there is no known pathway for the conversion of oxaloacetate to oxalate.
Where is the full Oxaloacetate CFS Product label?
You can find the product label here.
What can Oxaloacetate CFS do for my energy levels?
Mitochondria are the engines of your cells and use a process called the Krebs Cycle to turn food and oxygen into the energy we need to live. Oxaloacetate is a crucial metabolic compound essential to the Krebs cycle and energy production.
Using Oxaloacetate CFS to fuel your cells with ample oxaloacetate helps them create more energy, supporting your brain and body with the power to do more of what you love.
Has Oxaloacetate CFS been clinically tested in ME/CFS Patients?
Yes. Oxaloacetate CFS has been in two controlled clinical trials for the treatment of fatigue in ME/CFS patients. More information here at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9238249/
Can people under 18 years old use Oxaloacetate CFS?
Oxaloacetate CFS has not been tested in people under 18 years old. Please consult your licensed healthcare provider before taking Oxaloacetate CFS or any supplement if you are under 18.
Does Oxaloacetate CFS have side effects?
Many Oxaloacetate CFS users report increases in energy levels and reduction in brain fog, without the jitters that accompany energy products.
A minority of Oxaloacetate CFS users, especially those with sensitive stomachs, sometimes report heartburn directly after taking Oxaloacetate CFS. This is often remedied by taking Oxaloacetate CFS alongside a meal. Additionally, it is best to take oxaloacetate with breakfast and lunch to tune up your energy.
Taking the product late at night can give you so much energy that getting to sleep may be an issue.
How is Oxaloacetate CFS manufactured and quality controlled?
Oxaloacetate CFS is manufactured in state-of-the-art GMP facilities under strict quality control and environmental protection standards. Before product introduction, safety studies, including GLP toxicity tests, are run on our key product ingredients.
Have more questions?
To learn more about Oxaloacetate CFS, our parent company, Terra Biological, or any other questions you may have, please contact us.