Exhibit 99.1

Natural Alternatives International, Inc.

Announces Record Breaking Revenue for Fiscal 2005

SAN MARCOS, CALIF, September 6, 2005 /PRNewswire/ — Natural Alternatives International, Inc. (“NAI”) (Nasdaq: NAII), a leading formulator and manufacturer of customized nutritional supplements, today announced record revenue for fiscal 2005 of $91.5 million, the highest level in the company’s 25 year history. Net income for the fiscal year ended June 30, 2005 was $2.2 million, or $0.34 per diluted share.

For the fiscal year ended June 30, 2005, revenue increased 16% to $91.5 million from $78.5 million in the prior year. The growth in revenue resulted primarily from a 22% increase in contract manufacturing sales. Income before income taxes increased 13% to $3.4 million from $3.0 million in the prior year. Net income decreased to $2.2 million or $0.34 per diluted share compared to $3.0 million or $0.48 per diluted share in the prior year primarily due to recognition of a tax benefit in the prior year.

NAI also reported record revenue for its fourth quarter ended June 30, 2005. Fourth quarter revenue increased 6% to $24.7 million from $23.3 million for the comparable quarter last year. Revenue growth resulted primarily from an 8% increase in contract manufacturing sales. Income before income taxes decreased to $640,000 from $955,000 in the comparable quarter last year. Net income decreased to $285,000 or $0.04 per diluted share from $1.0 million or $0.15 per diluted share for the comparable quarter last year partially due to an increase in tax expense of $402,000 related to the prior year recognition of a tax benefit and current year dividend repatriation tax expense.

As of June 30, 2005, NAI had cash and working capital of $1.9 million and $14.4 million, respectively. Cash flows from operating activities for the fiscal year ended June 30, 2005 were $2.5 million. During fiscal 2005, we invested $7.7 million in capital expenditures primarily for the

expansion of our Vista, California manufacturing facility, and the acquisition of additional manufacturing equipment. We funded our capital expenditures from available cash on hand. As of June 30, 2005, we had $7.7 million available under our working capital line of credit.

CEO Mark LeDoux commented, “We are pleased to report our fourth consecutive year of increased revenue and operating profits. This past year we believe we improved our competitive positioning and fortified our sustainable growth plans with several accomplishments:

• Completed our Vista production facility expansion to 162,000 square feet.

• Obtained recertification of our Good Manufacturing Practices by the Therapeutic Goods Administration of Australia (TGA).

• Extended our business relationship with NSA.

• Reduced our debt 18% or $832,000 while funding $7.7 million of capital expenditures from available cash on hand.”

President Randell Weaver added, “We are pleased with our 16% growth in 2005 annual revenue. We are also delighted our revenue has grown by an average compound growth rate of 21% over the last four years. Looking forward, we expect our trend of annual revenue growth to continue. We anticipate quarterly revenue fluctuations due to, among other things, the timing of customer orders that are impacted by marketing programs, supply chain management, entry into new markets and new product introductions. We anticipate revenue in the first quarter of fiscal 2006 will be lower than our recent fourth quarter due to the timing of customer orders.”

“We also expect our long-term trend of growth in annual profitability to continue, however; there may be periodic quarterly declines in profitability due to revenue fluctuations, regulatory compliance costs and investments in new marketing, brand development and channel diversification initiatives. Regulatory compliance costs related to our TGA recertification are largely complete. Additionally, during our fourth quarter of fiscal 2005, we restructured our regulatory compliance, quality assurance and product development departments to be more responsive to customer demands and more competitive in the marketplace. Looking forward, in the first quarter of fiscal 2006 we expect an improvement in gross margin percentage and lower regulatory compliance costs that are expected to be offset by an increase in brand development costs.”

NAI, headquartered in San Marcos, California, is a leading formulator and manufacturer of nutritional supplements and provides strategic partnering services to its customers. Our comprehensive partnership approach offers a wide range of innovative nutritional products and services to the client including: scientific research, clinical studies, proprietary ingredients, customer-specific nutritional product formulation, product testing and evaluation, marketing management and support, packaging and delivery system design, regulatory review and international product registration assistance. For more information about NAI, please see our website at www.nai-online.com.

This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934 that are not historical facts and information. These statements represent our intentions, expectations and beliefs concerning future events, including, among other things, receiving continuing support from our larger customers, our expectations and beliefs with respect to future financial and operating results, our competitive positioning, our ability to continue to improve profitability and implement our strategic plans and the sustainability of our growth. We wish to caution readers these statements involve risks and uncertainties that could cause actual results and outcomes for future periods to differ materially from any forward-looking statement or views expressed herein. NAI’s financial performance and the forward-looking statements contained herein are further qualified by other risks including those set forth from time to time in the documents filed by us with the Securities and Exchange Commission, including our most recent Annual Report on Form 10-K and Quarterly Report on Form 10-Q.

SOURCE – Natural Alternatives International, Inc.

CONTACT – John R. Reaves, Chief Financial Officer, Natural Alternatives International, Inc.,

760-736-7700 or investor@nai-online.com.

NATURAL ALTERNATIVES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands)

(Unaudited)

	June 30, 2005		June 30, 2004
ASSETS
Cash and cash equivalents	$	1,916	$	7,495
Accounts receivable, net		10,834		8,889
Inventories, net		12,987		12,863
Deferred income taxes		421		1,010
Other current assets		1,012		633
Total current assets		27,170		30,890
Property and equipment, net		16,507		11,380
Deferred income taxes		276		—
Other assets		185		198
Total Assets	$	44,138	$	42,468
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities	$	12,772	$	13,422
Long-term debt, less current installments		2,979		3,841
Deferred income taxes		—		717
Deferred rent		1,264		220
Long-term pension liability		206		140
Total Liabilities		17,221		18,340
Stockholders’ Equity		26,917		24,128
Total Liabilities and Stockholders’ Equity	$	44,138	$	42,468

NATURAL ALTERNATIVES INTERNATIONAL, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except share and per share data)

(Unaudited)

	Three months ended June 30,					Year ended June 30,
	2005		2004			2005		2004
NET SALES	$	24,730	$	23,350		$	91,492	$	78,534
Cost of goods sold		20,456		17,874			73,095		59,964
Gross profit		4,274		5,476			18,397		18,570
Selling, general & administrative expenses		3,433		4,279			14,605		15,188
INCOME FROM OPERATIONS		841		1,197			3,792		3,382
Other expense, net		201		242			383		358
INCOME BEFORE INCOME TAXES		640		955			3,409		3,024
Provision for (benefit from) income taxes		355		(47	)		1,210		24
NET INCOME	$	285	$	1,002		$	2,199	$	3,000
NET INCOME PER COMMON SHARE:
Basic	$	0.05	$	0.17		$	0.37	$	0.51
Diluted	$	0.04	$	0.15		$	0.34	$	0.48
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic shares		5,981,883		5,881,440			5,949,212		5,843,241
Diluted shares		6,413,989		6,606,264			6,464,714		6,304,167