Selling nutritional supplements online is a viable business, but it comes with more regulatory and logistical hurdles than most e-commerce products. You need compliant labeling, substantiated claims, proper manufacturing documentation, and a payment processor that won’t freeze your funds three months in. Here’s how to navigate each step.
Choose Between Private Label and Custom Formulation
Your first major decision is whether to sell an existing formula under your own brand (private label) or develop a unique product from scratch (contract manufacturing). This choice shapes your timeline, budget, and differentiation in the market.
Private label supplements use pre-existing formulas that a manufacturer already produces. You add your branding and packaging. Minimum order quantities can be as low as a few hundred bottles, and the turnaround is fast since the formula already exists. This is the lowest-risk entry point, though you’ll be selling a product that other brands may also carry in near-identical form.
Contract manufacturing lets you create a custom formula. You work with the manufacturer to select ingredients, dosages, and delivery format. The tradeoff is time and money: first-run production typically takes 14 to 18 weeks from the date a purchase order is received. Subsequent orders move faster. Minimum order quantities vary by formulation but are generally higher than private label. If your brand strategy depends on a unique product, this route is worth the wait.
Whichever path you choose, your manufacturer must operate under current Good Manufacturing Practices (cGMP) as defined by 21 CFR Part 111. These federal regulations cover facility design, sanitation, equipment maintenance, and production controls. A cGMP-certified facility is not optional. It’s a legal requirement, and platforms like Amazon will ask for proof.
Get Your Labeling Right
The FDA regulates dietary supplement labels under specific guidelines that differ from standard food labeling. Every product needs a “Supplement Facts” panel listing dietary ingredients, serving size, amount per serving, percent of Daily Value, and any other ingredients. The format itself is prescribed, not something you can design freely.
If your product contains 0.5 grams or more of trans fat per serving, that must appear on a separate line under saturated fat. Products containing iron require a specific warning statement. These details are easy to overlook and expensive to fix after a production run.
The most critical labeling rule involves claims. You can make structure/function claims (“supports immune health”), nutrient deficiency claims, and general well-being claims. You cannot make disease claims (“treats diabetes,” “cures arthritis”). Any structure/function claim must be accompanied by the FDA’s required disclaimer: “This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.”
Before you print a single label, every claim on it must be backed by what the FDA and FTC call “competent and reliable scientific evidence.” This isn’t a suggestion. Manufacturers are legally required to have substantiation on file before making any claim on packaging or marketing materials. If the FTC investigates and you can’t produce supporting evidence, you face enforcement action regardless of whether the claim happens to be true.
Pick Your Sales Channels
Most supplement sellers use some combination of their own website, Amazon, and other marketplaces. Each has different requirements and economics.
Your Own Website
A Shopify or WooCommerce store gives you full control over branding, pricing, and customer relationships. You keep higher margins since there’s no marketplace commission. The downside is that you’re responsible for driving all your own traffic through ads, content, or social media.
Amazon
Amazon’s dietary supplement category has strict documentation requirements. For every product you list, you must submit a valid cGMP certificate from an accredited third-party certification body. You also need a finished product Certificate of Analysis (COA) from an ISO/IEC 17025 accredited laboratory, issued within the past 12 months, showing that each dietary ingredient matches what’s declared on the label. Alternatively, you can provide evidence of enrollment in recognized third-party quality programs like NSF/ANSI 173 Product Certification, USP Dietary Supplement Verification, NSF Certified for Sport, or Informed-Choice. Product images are also required. Amazon accepts GMP certificates from bodies including NSF, USP, SGS, Intertek, Eurofins, and several others.
The COA must be in PDF format and include the complete product name, batch number, and the amount per unit or per serving of each declared ingredient. If your manufacturer can’t provide this documentation, you can’t sell on Amazon.
Set Up Payment Processing Early
This catches many new supplement sellers off guard. Dietary supplements are classified as high-risk by payment processors, putting them in the same risk category as CBD and adult products. The reasons: the industry has higher-than-average chargeback rates, regulatory scrutiny, and a history of fraudulent operators.
Basic payment aggregators like Stripe, PayPal, or Square may initially approve your account, but the problems come later. A spike in chargebacks, a competitor’s misstep flagging the entire industry, or a routine review can trigger account freezes, fund holds, or outright shutdowns. When your payment account is frozen, your business stops.
Instead, set up a dedicated high-risk merchant account through a provider that specializes in nutraceutical businesses. These providers offer proper underwriting, meaning your account is evaluated individually rather than lumped in with millions of other merchants. The fees are higher than standard processing, but the stability is worth it. Get this in place before you launch, not after your first account gets shut down.
Get Product Liability Insurance
Product liability insurance is essential for any ingestible product. If a customer claims your supplement caused harm, you need coverage. Standard policy limits start at $1 million per occurrence and $2 million in aggregate, with a separate $2 million products and completed operations aggregate. Deductibles typically start at $1,000 to $2,500 per claim.
For small companies and startups doing under $2 million in annual sales, premiums generally run $3,000 to $3,500 per year, though some insurers offer bare-minimum policies starting around $1,500. Larger operations or higher-risk formulations cost more. Many retailers, Amazon included, may require proof of product liability coverage before allowing you to sell. Some contract manufacturers also require it before they’ll produce for you.
Navigate Advertising Restrictions
Paid advertising is where most supplement brands build their customer base, and it’s also where they get into the most trouble. The FTC holds advertisers to the same “competent and reliable scientific evidence” standard it applies to labels. Every claim in an ad, on a landing page, or in an email must be substantiated before you publish it.
Meta (Facebook and Instagram) prohibits ads that promote “unsafe substances, products or supplements” as determined at Meta’s sole discretion. Ads cannot encourage consumption of potentially unsafe supplements, and CBD product ads are restricted to the United States with no health claims allowed. Even compliant supplement ads get flagged and rejected regularly, so expect an approval process that requires patience and sometimes manual review requests.
Google Ads has its own restrictions on health claims and supplement advertising. The safest approach across all platforms is to stick to structure/function language (“supports joint flexibility”) and avoid anything that sounds like a medical claim (“reduces inflammation,” “lowers blood pressure”). Testimonials and before/after imagery face extra scrutiny and, depending on the platform, may be prohibited entirely.
Handle Storage and Fulfillment
Supplements degrade when exposed to heat, moisture, or light. Storage temperatures for most supplements fall in the 15°C to 25°C range (roughly 59°F to 77°F), with humidity ideally between 60% and 75%. Your manufacturer determines the specific storage requirements based on stability testing. Probiotics and certain oils may need refrigerated storage at 2°C to 8°C.
If you’re shipping small volumes, you can fulfill from a climate-controlled space yourself. As you scale, a third-party fulfillment center (3PL) that handles supplements becomes necessary. Look for facilities that maintain temperature monitoring, proper humidity control, and lot tracking so you can manage expiration dates and issue recalls if needed. Ask specifically whether they handle dietary supplements, because not all 3PLs are equipped for products with stability requirements.
Shipping matters too. Supplements sitting in a delivery truck in July heat can degrade before they reach your customer. Insulated packaging or expedited shipping during summer months protects product quality and reduces complaints.
Selling Internationally
If you plan to ship outside the United States, be aware that supplement regulations vary dramatically by country. The European Union is particularly strict. Between 2014 and 2016, the most common reason US supplement shipments were rejected at EU borders was the presence of unauthorized substances and novel food ingredients. In that period, 142 notifications were filed for unauthorized substances alone.
Ingredients that are perfectly legal in the US may be banned in the EU. Common offenders include DMAA, synephrine, yohimbine, DHEA, and vanadium, along with various concentrated plant extracts. Products containing these ingredients will be stopped at the border and destroyed. Before selling to any international market, verify that every ingredient in your formula is approved for sale in that specific country. The regulatory burden of international compliance is significant enough that most new supplement brands focus on domestic sales first.