Colorado Supplement Age Restriction: Diet Pills, Not Creatine

This Colorado act is not a general creatine ban or a general supplement age limit. As of October 14, 2026, its under-18 sales rule applies to a narrow class of over-the-counter diet pills marketed for weight loss and sold with a Drug Facts panel—not ordinary supplements with a Supplement Facts panel.

If you are checking a creatine tub, protein powder, or pre-workout, start with the label. That one detail helps separate Colorado’s diet-pill rule from the broader rules used in some other states.

Short answer: Colorado restricts diet pills, not creatine

Colorado’s signed SB23-176 makes it unlawful for a retail establishment to sell, transfer, or furnish covered over-the-counter diet pills to someone under 18. The rule took effect July 1, 2024. The signed Colorado act defines those products as drugs marketed for weight loss that may be sold without a prescription.

That is different from a dietary supplement. The act specifically describes covered products as ones marketed with a Drug Facts panel and containing approved drug ingredients, ingredients deemed adulterated under federal law, or both. It does not create an across-the-board age restriction for creatine, protein, vitamins, or every product sold in a supplement aisle.

For lifters, the practical point is simple: creatine itself is not what Colorado’s act names as the covered product class. A retailer can still set its own checkout or delivery policy, so check the seller’s current rules before you place an order.

What does Colorado’s act actually cover?

As of October 14, 2026, Colorado’s state-sales question is answered by the signed Colorado act. It covers an over-the-counter diet-pill drug class that is labeled and marketed for weight loss under the federal Food, Drug, and Cosmetic Act and is sold without a prescription.

The act defines a retail establishment broadly. It includes pharmacies, grocery stores, other retail stores, and sellers taking orders by mail, phone, email, website, online catalog, or app. In other words, the definition reaches online retail as well as an in-store counter.

Colorado treats a violation as a deceptive trade practice. This is a state retail-sale rule. It is not a blanket rule about possession, every supplement, sports eligibility, or military eligibility.

Which rule answers your actual question?

Legal availability does not establish that a product is safe or effective for your goal. For a label-focused next step, see supplement timing and muscle-growth supplements.

How does Colorado compare with New York and California?

Colorado is narrower than New York’s current rule. New York’s General Business Law 391-oo restricts under-18 sales of both over-the-counter diet pills and dietary supplements marketed for weight loss or muscle building. Its definition tells courts to consider ingredients and marketing, including creatine as one listed factor. It also sets adult-signature and photo-ID requirements for covered deliveries.

California is broader as well, but its newer rule is a future rule as of October 14, 2026. California’s enacted AB 2030, approved September 28, 2026, covers over-the-counter diet pills and dietary supplements marketed for weight loss or muscle building for buyers under 18. Because it has no urgency clause, California’s constitutional effective-date rule puts its effective date at January 1, 2027.

California also has a separate, current rule for minors involving supplements containing specified ephedrine-group alkaloids and listed steroid precursors, including DHEA. That separate provision is set out in California Health and Safety Code 110423.2. Keep that rule separate from AB 2030’s broader rule that begins in 2027.

What should you check before you buy?

First, find the label panel. Drug Facts points you toward Colorado’s narrow OTC diet-pill definition. Supplement Facts identifies a dietary supplement, which is not automatically covered by Colorado’s act. The product’s marketing and the retailer’s category can matter under other states’ laws, especially New York and California.

• Save the exact product name, form, flavor, and label date.
• Record whether the label says Drug Facts, Supplement Facts, or prescription drug.
• Check the state where the sale and delivery occur.
• Read the retailer’s current age-verification and delivery policy.
• If you compete, check your sport’s current rule separately from the state sales rule.

For athletes, Colorado Children’s Hospital notes that supplements may contain contaminants and recommends third-party certification as an added safeguard; its sports-supplement guidance also explains why the exact product matters. If you are comparing weight-management products, our weight-loss supplement guide can help you organize the label questions.

Legal category and jurisdiction card

A product can be sold as a supplement, subject to an age restriction, and still be prohibited by a sports organization. Use this card to record what a current official source says about one exact product and one activity. It does not issue legal clearance.

How to use it

1. Copy the exact current product name and complete label. Identify Supplement Facts, Drug Facts, or a prescription drug rather than relying on phrases such as “legal steroids.”
2. Choose the activity you need answered: sale, delivery, purchase, possession, or sports participation. Record the relevant state and date.
3. Read the current official rule and its definition. Check whether the product’s ingredients, pill or powder format, and marketing fall within that definition.
4. Record whether the source is current law, an enacted future rule, a proposal, or an unresolved question. Never treat an introduced bill’s effective-date sentence as enacted law.
5. Keep the conclusion narrow. For a personal product or business decision that remains uncertain, use the recorded facts to obtain qualified advice.

Worked example: fictional

Alex, age 28, is comparing a hypothetical creatine powder marketed for muscle strength and delivered to New York on October 9, 2026.

Read the status field before comparing products. “Current rule” means the cited provision is operative; it does not mean a product is automatically approved. “Future rule” means enacted but not yet effective. “Proposal” means it may never become law. “Unresolved” means the source or product facts do not support a conclusion.

This is general information, not legal advice. For Colorado, use the exact label and the retailer’s policy as your next check.

By the Gym Floor Guide Editorial Team