Natural Alternatives International
Natural Alternatives International (NAI) is a publicly traded (NASDAQ: NAII) contract manufacturer of nutritional supplements headquartered in Carlsbad, California. Founded over 45 years ago, NAI provides formulation, manufacturing, and marketing support services for dietary supplement brands. The company specializes in private-label contract manufacturing and holds international regulatory approvals including NSF GMP, NSF Certified for Sport, TGA (Therapeutic Goods Administration, Australia), and Swissmedic. NAI reported $130 million in annual revenue for fiscal year 2025, with private-label contract manufacturing sales growing 17.7% year-over-year. The company also develops proprietary ingredients, including its beta-alanine products under the CarnoSyn and TriBsyn brands. NAI employs over 500 people and maintains manufacturing facilities in Southern California.
Carlsbad, CA
Directory Listing · Records Reviewed
Public records and independent sources have been reviewed.
What this means →- MOQMOQ (Minimum Order Quantity)The smallest production run a manufacturer will accept for an order.
- Not publicly disclosed
- LEAD TIMELead TimeThe time from order placement to finished product delivery.
- Not publicly disclosed
§1Editorial assessment
Natural Alternatives International (NAI) is a publicly traded (NASDAQ: NAII) contract manufacturer of nutritional supplements headquartered in Carlsbad, California. Founded over 45 years ago, NAI provides formulation, manufacturing, and marketing support services for dietary supplement brands. The company specializes in private-label contract manufacturing and holds international regulatory approvals including NSF GMP, NSF Certified for Sport, TGA (Therapeutic Goods Administration, Australia), and Swissmedic. NAI reported $130 million in annual revenue for fiscal year 2025, with private-label contract manufacturing sales growing 17.7% year-over-year. The company also develops proprietary ingredients, including its beta-alanine products under the CarnoSyn and TriBsyn brands. NAI employs over 500 people and maintains manufacturing facilities in Southern California.
§2Six-gate readout
Six gates we apply before any name appears in the directory. Each gate is auto-derived from public evidence on this profile.
§3Inspection history
§4Certifications
0 of 3 certifications independently confirmed. What this means
§5Capability matrix
- PRODUCT TYPES
- Private Label Supplements · Custom Formulated Supplements · Capsule Supplements · Tablet Supplements · Powder Supplements · Proprietary Ingredients (CarnoSyn, TriBsyn)
- CAPABILITIES
- Large-Scale Contract Manufacturing · Private Label Manufacturing · Custom Formulation Development · Proprietary Ingredient Development · NSF Certified for Sport Testing · International Regulatory Compliance (TGA, Swissmedic, Health Canada) · Marketing Support Services · 500+ Employees
- DOSAGE FORMS
- capsules · powders · tablets
§6Sources
- Natural Alternatives International - Official Website(2026-03-27)
- NASDAQ - NAII Stock Profile(2026-03-27)
- Yahoo Finance - NAII Financial Data(2026-03-27)
- GlobeNewsWire - NAI Q1 FY2026 Results(2026-03-27)
Dietary supplement manufacturers must comply with 21 CFR Part 111 (Current Good Manufacturing Practice for dietary supplements). This includes requirements for personnel, facilities, equipment, production, laboratory operations, and record-keeping.
Disclosures
- No material connection exists between Inventory Ready and this manufacturer
For the gate-by-gate readout that produces this vendor's score, see our six-gate scoring readout. The connection map between Natural Alternatives International and other vendors, capabilities, and certifications is in the manufacturer atlas.
Interested in Natural Alternatives International?
Tell us about your project and we'll help you determine if this manufacturer is a good fit.