Beverage formulation: a founder's guide.

The PRD: your product on one page

Formulation does not start at the bench. It starts on paper, with the Product Requirements Document (PRD): the single spec that defines your product before anyone mixes anything. It captures the category and format, the flavor and sweetener direction, the nutrition and functional targets, the label claims and certifications, the ingredients to include or exclude, the packaging and preservation, and the retail price and cost of goods targets. Deciding these up front is what keeps a project from drifting, and it is the brief a formulator works to. You can start from JAI's free Beverage PRD template, the same structure we use with clients, with a filled-in example. When you work with us, your draft becomes the Preliminary PRD, and a kick-off call refines it into the Approved PRD that governs every formulation round, supplier decision, and co-packer handoff that follows.

Why put it all in one document? Because a beverage is a system, not a list. For example, an ingredient like sugar is not only sweetness: it is also bulk, mouthfeel, preservation, and a flavor carrier, so you cannot change it without re-balancing the rest. The PRD forces you to decide the interacting variables on purpose, in one place, rather than discovering them one expensive surprise at a time.

The first section, the project overview, looks like the easy part, but it is where the constraints are set. Your category (a functional water, a soda, a ready-to-drink tea, an energy drink) tends to fix your likely pH class, your sweetener strategy, and whether functional dosing questions even arise. Your target consumer and channel set the price the product can carry, and therefore the cost the formula has to fit. Everything downstream inherits these answers, so it pays to be specific here rather than aspirational.

Flavor: your sources and how to choose

Section 2 of the PRD asks where your flavor comes from, and there are more answers than "natural or artificial." These are the main sources a formulator works with:

• Natural flavors. Under U.S. Food and Drug Administration (FDA) rules (21 CFR 101.22), a natural flavor is a flavoring whose constituents are derived from a real plant or animal source, a spice, fruit, herb, bark, or root, and whose job in the drink is flavoring rather than nutrition. Note that "natural" here describes where the flavor came from, not how processed it is or whether it is healthier.
• Artificial flavors. The mirror image: any flavoring substance not derived from those natural sources, usually a molecule made in a lab. It is often cheaper and more consistent from batch to batch, but it cannot carry a "natural" claim.
• Extracts, essential oils, and oleoresins. These are concentrated forms of natural flavoring. An extract pulls the aromatic compounds out of a raw material into a solvent (vanilla extract is a standardized one, defined at not less than 35 percent alcohol); an essential oil or oleoresin is a pressed or extracted aromatic fraction, like a cold-pressed citrus oil. They read as authentic and premium, and they cost more.
• Juice. Real juice does triple duty: it flavors, it earns a real-fruit story and front-of-pack appeal, and it can lend natural color and body that a flavor alone cannot. The trade-offs are cost, batch-to-batch variability with the crop, and the sugar and calories it carries. And while juice is a powerful part of a formula, on its own it often lacks the aroma, complexity, and freshness that make a drink come alive, which is why it is usually blended with a matching flavor rather than used in place of one.

One labeling knock-on to know early: if your main flavor is reinforced by other natural flavors, the label has to read "[your flavor] with other natural flavor," often abbreviated in the trade as WONF (with other natural flavor). And whatever the source, the flavor has to be chosen for the matrix, meaning the drink it actually lives in, because a bright citrus top note can fade fast in a low-pH, light-exposed drink. We go deeper in our guide to flavor versus extract in beverages.

Color is specified here too, and it is a stability and label decision. Synthetic certified colors are highly stable and inexpensive; natural colors are pricier and less stable to light, heat, and low pH, and can shift or fade over shelf life, so a "no artificial colors" line in your PRD is also a shelf-life and cost commitment.

Sweeteners: sugar and its alternatives

Cutting sugar is the single most common brief we get, and it is harder than it looks, because sugar is not just sweetness. Sugar also carries a drink's body and mouthfeel, the timing of the sweet sensation, some of its preservation, and a good deal of its flavor, so pulling it out and dropping in a high-intensity sweetener leaves a drink that reads thin or watery, with lingering off-notes. Rebuilding it is a system, not a swap: you blend a high-intensity sweetener with a bulk or rare sugar for body, then add hydrocolloids or fibers to rebuild the mouthfeel. Each addition replaces something sugar did for free, and each adds cost.

The demand behind that brief is real: the World Health Organization recommends adults keep free sugars, which include the sugars in honey, syrups, and fruit juice, under 10 percent of daily calories, and consumer surveys consistently show a large share of shoppers actively cutting added sugar. That pressure is why the sweetener landscape is worth knowing:

• Caloric sugars: cane sugar, and the "natural" sugars like honey, agave, and maple. To a label, and to the World Health Organization, these are all still sugars.
• High-intensity sweeteners, artificial: the FDA has approved six as food additives, aspartame, acesulfame potassium (Ace-K), sucralose, saccharin, neotame, and advantame. They are cheap and potent, but they carry an artificial label.
• High-intensity sweeteners, plant-based: stevia (steviol glycosides) and monk fruit are treated as generally recognized as safe, so they can support a "natural" positioning. One trap to know: only high-purity steviol glycosides are cleared, not whole-leaf or crude stevia.
• Rare sugars and sugar alcohols: allulose and erythritol give body closer to sugar's at fewer calories, and are often what rebuilds the mouthfeel a high-intensity sweetener loses.

Most real sweetener systems blend two or three of these to balance taste, label, and cost. Which blend is right falls straight out of the claims you decide next, since a claim like "no added sugar" rules some of these out entirely.

Nutrition and functional targets

Section 3 becomes your Nutrition Facts panel, which is regulated, so the targets you write here are label commitments rather than private notes. Under the FDA's labeling rule (21 CFR 101.9), the panel must declare calories, sodium, total and added sugars, protein, and a set of vitamins and minerals, and the serving size is set by a standard reference amount for the category, not chosen freely. Added Sugars is its own mandatory line indented under total sugars, which is exactly why a sugar-reduction target is a public number on the pack, not something you can quietly manage in the recipe.

Then there are the functional ingredients, the reason many of these drinks exist. Before efficacy or dose, every one has to clear a single gate: it must be a legal food ingredient, either generally recognized as safe or an approved food additive. A novel active that is neither cannot simply be added. The categories we most often work with include:

• Energy: caffeine, usually from natural sources like green tea, guarana, or yerba mate, often paired with taurine and B vitamins.
• Calm and focus: L-theanine, an amino acid from green tea that is often combined with caffeine, and adaptogens such as ashwagandha and rhodiola.
• Gut health: prebiotic fibers like inulin from chicory root, and probiotics, the live cultures behind the gut-health category.
• Hydration and recovery: electrolytes such as sodium, potassium, and magnesium, plus protein and collagen.
• Botanicals and antioxidants: ginger, turmeric, hibiscus, and the like.

Two cautions belong in the PRD. Dose these against how people actually drink the product, not against a competitor's front-of-pack number, and keep any benefit language modest, because the evidence for many functional ingredients is still described as limited and a beverage cannot make a disease claim. The functional target you set here also drives the claim you can make about it, which is the next section.

Claims, certifications, and allergens

Section 4 is where marketing meets the formula, because in the United States most of the claims a beverage makes are defined by the FDA. The words you want on the front of the pack are formulation targets, each with a number attached. These are the common ones:

That last row is the trap. "Natural" has no formal FDA definition, and "clean label" is not a regulated term at all, so a brand built on those words is standing on marketing convention rather than a threshold it can prove. The defensible claims are the numeric ones above. ("Low sugar," for the record, is also undefined, so it should not be used.)

Certifications are a separate family of claims, each with its own authority and, importantly, its own effect on your supply chain. Organic is a United States Department of Agriculture program, gluten-free is an FDA rule, and Non-GMO Project Verified is a private third-party seal. Each one pushes requirements upstream: every ingredient needs certified-compliant documentation from its supplier, which narrows the suppliers you can use, can raise ingredient cost, and adds time both to sourcing and to the audit or verification itself. A certification decided in the PRD is cheap. The same decision made after formulation can mean re-sourcing ingredients and re-running the work.

Allergens close the section. There are nine major food allergens in the United States, and sesame became the ninth in 2023, so it is the one most likely to be missed. Your allergen answer drives both the include and exclude lists in the next section and the allergen statement on the label.

Ingredients, packaging, and preservation

Ingredients (Section 5) is downstream of everything above: an allergen you excluded or a gluten-free target you set becomes a supply-chain constraint, not just a formula line. And do not overlook the biggest ingredient of all. Water is roughly 80 to 99 percent of a beverage by weight, and its chemistry, its alkalinity and minerals, shifts both taste and how your acid behaves, so source water belongs on the include list as a specified requirement, not a default.

Packaging (Section 6) is a shelf-life and chemistry decision, not just a look. Peer-reviewed packaging science lays out the trade: aluminum cans give the best barrier against light, oxygen, and moisture but need interior linings to prevent low-pH corrosion and metal migration in acidic drinks; glass is inert with a near-total barrier but is heavy, brittle, and more expensive; and polyethylene terephthalate (PET) is light and clear but a weaker oxygen barrier than metal or glass. Your format choice trades barrier against cost, weight, and how the package interacts with a low-pH product.

Preservation is the single most consequential production decision, and it turns on one number: pH 4.6. At or below it, whether your drink is naturally acidic or acidified with added acid, it can be made shelf-stable with acidity plus a milder pasteurization. Above it, the drink is a low-acid food that legally requires a full thermal process to commercial sterility or refrigeration, because Clostridium botulinum can grow above that line and its spores survive pasteurization. For any shelf-stable acidified or low-acid drink, a qualified process authority must review and validate the process. We cover this in depth in our guide to pH and acidity in beverage formulation. And your shelf life target is not a guess: it is proven through accelerated and real-time testing before it goes on the pack.

Commercial targets: price, cost, and margin

Section 7 is where every formulation decision meets the profit and loss statement. You set a retail price and a target cost of goods, and the formula has to fit inside them. The margin stack is benchmarkable, though it varies by channel: selling through distribution, distributors typically take around 20 to 30 percent and retailers around 30 to 50 percent, brands often aim for roughly 30 percent, and a common rule of thumb is that production cost should land around 40 percent of retail or below. Treat those as directional benchmarks, not fixed numbers, because they move with your channel, category, and volume.

Here is why this section sits last but decides everything: every upstream choice pushes cost. Premium natural flavors, natural colors, and rare sugars and fibers that rebuild body after sugar reduction all cost more, and the more demanding preservation processes cost more still. So the commercial targets are where positioning meets margin, and the better ingredient or process only pays off at the right price point and the right customer.

From PRD to production: the four phases

With the PRD approved, JAI runs the build in four phases, each ending in a concrete deliverable.

Phase 1 is where the approved PRD becomes the signed-off PRD: the same document, now locked and testable, that the whole build works from. Fixing every decision here, on paper and before any bench work, is what keeps the later phases from drifting or quietly reopening choices that were supposed to be settled.

Phase 2 builds the supply chain the PRD calls for. This is where the legality gate matters (a functional ingredient has to be a legal food ingredient before it can be sourced) and where certification claims like organic, gluten-free, or Non-GMO turn into supplier documentation requirements. For a shelf-stable acidified or low-acid drink, the process authority is engaged here, not at the end.

Phase 3 is the bench work: multiple samples per SKU, structured feedback after each round, and iteration until the formula is locked. This is also where bench success does not equal scale success. At volume, heating and cooling rates, shear, hold times, and equipment surfaces all change, so the finished pH and the thermal process have to be validated for the real production process, not just the beaker.

Phase 4 is the handoff. The locked formula becomes the Final Deliverable Package: the Final Formula (the recipe written as an ingredient list of percentages and weights), the governing Final Product Requirements Document, the Nutrition Facts panel, the cost analysis, supplier contacts, spec sheets, a generic batch sheet, and a Process Authority Letter when required, plus the shelf-life data behind the code date. That is everything a contract manufacturer needs to make the drink. Actually running it on a line is the next step, production operations, which JAI offers as a separate engagement.