SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934

NATURE'S SUNSHINE PRODUCTS, INC.
(Exact name of Registrant as specified in its charter)

75 East 1700 South
Provo, Utah 84606
(Address of principal executive offices and zip code)

(801) 342-4300
(Registrant's telephone number)

        Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

        The number of shares of Common Stock, no par value, outstanding on July 30, 2002 was 15,809,991 shares.

NATURE'S SUNSHINE PRODUCTS, INC.
FORM 10-Q
For the Quarter Ended June 30, 2002
Table of Contents

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PART I FINANCIAL INFORMATION

Item 1. FINANCIAL STATEMENTS

NATURE'S SUNSHINE PRODUCTS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS
(Amounts in Thousands)
(Unaudited)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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NATURE'S SUNSHINE PRODUCTS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED BALANCE SHEETS (CONTINUED)
(Amounts in Thousands)
(Unaudited)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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NATURE'S SUNSHINE PRODUCTS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
AND COMPREHENSIVE INCOME
(Amounts in Thousands, Except Per-Share Information)
(Unaudited)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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NATURE'S SUNSHINE PRODUCTS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF INCOME
AND COMPREHENSIVE INCOME
(Amounts in Thousands, Except Per-Share Information)
(Unaudited)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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NATURE'S SUNSHINE PRODUCTS, INC. AND SUBSIDIARIES
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
Increase (Decrease) in Cash and Cash Equivalents
(Amounts in Thousands)
(Unaudited)

The accompanying notes are an integral part of these condensed consolidated financial statements.

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NATURE'S SUNSHINE PRODUCTS, INC. AND SUBSIDIARIES
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(Amounts in Thousands, Except Per-Share Information)
(Unaudited)

(1) INTERIM FINANCIAL STATEMENT POLICIES AND DISCLOSURES

        The unaudited, condensed consolidated financial statements of Nature's Sunshine Products, Inc. and subsidiaries included herein have been prepared pursuant to the rules and regulations of the United States Securities and Exchange Commission. Certain information and footnote disclosures normally required in financial statements prepared in accordance with accounting principles generally accepted in the United States have been condensed or omitted pursuant to such rules and regulations, although the Company believes the following disclosures are adequate to make the information presented not misleading.

        These condensed consolidated financial statements reflect all adjustments, which in the opinion of management are necessary to present fairly the financial position as of June 30, 2002, and the results of operations and cash flows for the periods presented. All of the adjustments which have been made in these condensed consolidated financial statements are of a normal recurring nature. Operating results for the three and six months ended June 30, 2002, are not necessarily indicative of the results that may be expected for the year ending December 31, 2002.

        The Company suggests that these condensed consolidated financial statements be read in conjunction with the consolidated financial statements and the notes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2001.

(2) RECENT ACCOUNTING PRONOUNCEMENTS

        In July 2001, the Financial Accounting Standards Board issued Statement of Financial Accounting Standard ("SFAS") No. 141, "Business Combinations", and SFAS No. 142, "Goodwill and Other Intangible Assets." SFAS No. 141 requires business combinations initiated after June 30, 2001, to be accounted for using the purchase method of accounting and broadens the criteria for recording identifiable intangible assets separate from goodwill and amounts previously recorded as goodwill may be separately identified and recognized apart from goodwill. SFAS No. 142 requires the use of a nonamortization approach to account for goodwill and indefinite-lived intangibles, and instead these assets are reviewed for impairment on a periodic basis as appropriate. The provisions of each statement which apply to goodwill and intangible assets acquired prior to June 30, 2001, were adopted by the Company on January 1, 2002.

        In connection with the adoption of SFAS No. 142, the Company reassessed the useful lives and classification of its intangible assets. The Company determined that $3,213 of previously identified goodwill should be classified as an acquired distributor network and continues to be amortized over a 10-year period. The Company has determined that none of its intangible assets are impaired. Because all of the Company's intangible assets continue to be amortized over the same useful lives, there is no

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impact on operations. Therefore, no reconciliation of reported net income to adjusted net income is presented. Information regarding the Company's intangible assets is as follows:

        Amortization expense for intangible assets for the six months ended June 30, 2002, was $626. Estimated amortization expense for the remainder of 2002 and the five succeeding fiscal years follows:

(3) INVENTORIES

        Inventories consist of the following:

(4) NET INCOME PER COMMON SHARE

        Basic net income per common share (Basic EPS) excludes dilution and is computed by dividing net income by the weighted-average number of common shares outstanding during the period. Diluted net income per common share (Diluted EPS) reflects the potential dilution that could occur if stock options or other contracts to issue common stock were exercised or converted into common stock. The computation of Diluted EPS does not assume exercise or conversion of securities that would have an anti-dilutive effect on net income per common share.

        As of June 30, 2002, the Company had a total of 3,765 common stock options outstanding. These options were granted at fair market value and have a weighted-average exercise price of $8.18 per share.

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        Following is a reconciliation of the numerator and denominator of Basic EPS to the numerator and denominator of Diluted EPS for the three months ended June 30, 2002 and 2001:

        For the three months ended June 30, 2002 and 2001, there were outstanding options to purchase 259 and 623 shares of common stock, respectively, that were not included in the computation of Diluted EPS, as their effect would have been anti-dilutive. For the six months ended June 30, 2002 and 2001, there were outstanding options to purchase 230 and 866 shares of common stock, respectively, that were not included in the computation of Diluted EPS, as their effect would have been anti-dilutive.

(5) EQUITY TRANSACTIONS

        The Company has declared consecutive quarterly cash dividends since 1988. The most recent quarterly cash dividend of 3¹/3 cents per common share was declared on July 29, 2002, to shareholders of record on August 9, 2002, and is payable on August 16, 2002.

        For the three and six months ended June 30, 2002, the Company repurchased approximately 352 and 521 shares of its common stock at an average price per share of $11.01 and $11.55, respectively, as part of its 1,000-share buyback program authorized by the Company's Board of Directors in February 2001. At July 29, 2002, the Company had 251 shares remaining to be purchased under the current buyback program.

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(6) ACCUMULATED OTHER COMPREHENSIVE LOSS

        The composition of accumulated other comprehensive loss, net of tax, is as follows:

(7) SEGMENT INFORMATION

        The Company has four operating segments. These operating segments are components of the Company for which separate information is available that is evaluated regularly by management in deciding how to allocate resources and assess performance. The Company evaluates performance based on operating income.

        The Company's operating segments are based on geographic operations. Intersegment sales are eliminated in consolidation and are not material.

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        Operating segment information for the three and six months ended June 30, 2002 and 2001, is as follows:

        Segment assets as of June 30, 2002 and December 31, 2001, are as follows:

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Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

        The following discussion should be read in conjunction with the consolidated financial statements, the notes thereto and management's discussion and analysis included in the Company's Annual Report on Form 10-K for the year ended December 31, 2001.

SIGNIFICANT ACCOUNTING POLICIES

Revenue Recognition

        For domestic sales, the Company generally receives its product sales price in the form of cash or credit card accompanying the orders from independent Distributors and Managers. From time to time, the Company's domestic operation extends short-term credit associated with product promotions. For certain of the Company's international operations, the Company offers credit terms consistent with industry standards within each respective country. Sales revenue and related volume incentives are recorded when the merchandise is shipped. Amounts received for unshipped merchandise are recorded as customer deposits and are included in accrued liabilities. Payments of volume incentives related to product orders are made in the month following the sale.

Impairment of Long-Lived Assets

        The Company reviews its long-lived assets, including intangibles, for impairment when events or changes in circumstances indicate that the book value of an asset may not be recoverable. The Company uses an estimate of future undiscounted net cash flows of the related asset or group of assets over the remaining life in measuring whether the assets are recoverable. At June 30, 2002, the Company did not consider any of its long-lived assets impaired. See "Recent Accounting Pronouncements".

Inventories

        Inventories are stated at the lower of cost (using the first-in, first-out method) or market value. At June 30, 2002, management believes the Company had incurred no material impairments in the carrying value of its inventories, other than impairments for which a provision has been made.

Investments

        A substantial portion of the Company's investments are categorized as available-for-sale securities and are reported at fair value, with unrealized gains and losses, net of tax, recorded in accumulated other comprehensive income (loss) in shareholders' equity. The cost of the securities sold is based on the specific identification method. Realized gains and losses on sales of available-for-sale securities are included in interest and other income.

RESULTS OF OPERATIONS

        The following table identifies (i) the relationship that net income items disclosed in the condensed consolidated financial statements have to total sales, and (ii) the amount and percent of change of such items compared to the corresponding prior period.

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(Dollar Amounts in Thousands)
(Unaudited)

        The following table identifies (i) the relationship that net income items disclosed in the condensed consolidated financial statements have to total sales, and (ii) the amount and percent of change of such items compared to the corresponding prior period.

(Dollar Amounts in Thousands)
(Unaudited)

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Sales Revenue

        Sales revenue for the three months ended June 30, 2002, was $77.9 million compared to $81.8 million for the same period in the prior year, a decrease of approximately 5 percent. Sales revenue for the six months ended June 30, 2002, was $153.8 million compared to $163.5 million for the same period in the prior year, a decrease of approximately 6 percent. The decrease in sales revenue for the three and six months ended June 30, 2002, primarily reflects decreases in sales revenue in the Company's international operations.

        Sales revenue in the Company's United States operation for the three and six months ended June 30, 2002, was $45.3 million and $89.5 million, a decrease of approximately 1 percent and 2 percent, respectively, compared to the same periods in the prior year. Increased product competition in the nutritional supplement market, as well as increased competition for Distributors caused the sales revenue decrease in the United States. The Company expects competition to remain strong for the foreseeable future.

        The Company's international operations reported sales revenue of $32.6 million and $64.3 million for the three and six months ended June 30, 2002, a decrease of approximately 10 percent, respectively, compared to the same periods in the prior year.

        Sales revenue in Latin America was $16.8 million and $32.6 million for the three and six months ended June 30, 2002, a decrease of 12 percent and 16 percent, respectively, compared to the same periods in the prior year. The sales revenue decline experienced in Latin America was primarily due to import restrictions imposed by the Brazilian government, and the decrease in sales revenue attributable to the devaluation of the local currency as well as the unstable economic environment in Venezuela.

        Sales revenue in Asia Pacific was $9.2 million and $19.3 million for the three and six months ended June 30, 2002, a decrease of 19 percent and 11 percent, respectively, compared to the same periods in the prior year. The sales revenue decline experienced in the Company's Asia Pacific markets is the result of continued sales revenue decreases experienced in the Company's Synergy operation as well as the decrease in sales revenue reported by Korea due to increased competition.

        Sales revenue in the Company's other markets was $6.5 million and $12.4 million for the three and six months ended June 30, 2002, an increase of 16 percent and 11 percent, respectively, compared to the same periods in the prior year. The growth in sales revenue experienced in the Company's other markets is primarily due to the results of its operations in the Russian Federation.

        The Company's independent sales force consists of Managers and Distributors. A Distributor interested in earning additional income by committing more time and effort to selling the Company's products may attain the rank of "Manager." Appointment as a Manager is dependent upon attaining certain purchase volume levels and demonstrating leadership abilities. The number of Managers at June 30, 2002, was approximately 19,100 compared to approximately 18,900 at December 31, 2001. The number of Distributors at June 30, 2002, was approximately 555,000 compared to approximately 596,000 at December 31, 2001.

Cost of Goods Sold

        For the three and six months ended June 30, 2002, cost of goods sold decreased slightly, as a percent of sales, compared to the same period in the prior year due to increased efficiencies attributable to the Company's expansion of its manufacturing facility. Management expects cost of goods sold to remain relatively constant as a percent of sales during the remainder of 2002 compared to the six months ended June 30, 2002.

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Volume Incentives

        Volume incentives are payments to independent sales force members for reaching certain levels of sales revenue performance and organizational development and are an integral part of the Company's direct sales marketing program. Volume incentives vary slightly, on a percentage basis, by product due to the Company's pricing policies. For the three and six months ended June 30, 2002, volume incentives, as a percent of sales, remained relatively constant compared to the same period in the prior year. Management expects volume incentives to remain relatively constant, as a percent of sales, during the remainder of 2002, compared to the six months ended June 30, 2002.

Selling, General and Administrative

        Selling, general and administrative expenses for the three and six months ended June 30, 2002, increased as a percent of sales compared to the same period of the prior year as a result of the decrease in sales revenue in the Company's United States and international markets as well as expenditures associated with the Company's sales conventions, travel and incentive programs. For the remainder of 2002, management expects selling, general and administrative expenses, as a percent of sales, to return to those levels experienced in the prior year.

Other Income

        Other income for the six months ended June 30, 2002, decreased approximately $1.5 million as a result of an impairment of the Company's investment in Cetalon Corporation of $3.0 million.

Product Liability

        Similar to other manufacturers and distributors of products that are ingested, the Company faces an inherent risk of exposure to product liability claims in the event that, among other things, the use of its products results in injury. As a result of increased regulatory scrutiny of products that contain ephedrine alkaloids and kava, the Company has not been able to obtain product liability insurance covering such products. Approximately 2 percent of the Company's products contain some amount of ephedrine alkaloids and kava. The Company carries insurance in the types and amounts that management considers reasonably adequate to cover the risks associated with its business. Premiums for the Company's product liability coverage applicable to all its products increased approximately 35 percent at June 1, 2002, offering less coverage than that of the prior year. There can be no assurance that product liability insurance will continue to be available at a reasonable cost or, if available, to cover potential liabilities associated with the Company's products. In the event that product liability claims exceed product liability coverage, the results could have a material negative impact on the Company. The Company is exploring various options to obtain other forms of coverage, including but not limited to, captive plans.

Segment Information

        See information included in the condensed consolidated financial statements under Item 1 Note 7.

Balance Sheet

Accrued Volume Incentives

        Accrued volume incentives decreased approximately $1.4 million as of June 30, 2002, compared to December 31, 2001, as a result of decreased U.S. and international sales revenue during the quarter ended June 30, 2002.

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Accrued Liabilities

        Accrued liabilities increased approximately $3.9 million as of June 30, 2002, compared to December 31, 2001, as a result of accruals associated with the Company's sales conventions, travel and incentive programs.

LIQUIDITY AND CAPITAL RESOURCES

        Cash and cash equivalents decreased approximately $4.4 million as of June 30, 2002 compared to December 31, 2001. The decrease in cash and cash equivalents is primarily the result of the Company's authorized stock buyback program and its continuing repurchase of its common shares in the open market. During the six months ended June 30, 2002, cash totaling $6.0 million was used to repurchase approximately 521,000 shares of common stock. During the six months ended June 30, 2002, the Company recorded an impairment loss of $3.0 million relating to long-term investments.

        Management believes that working capital requirements can be met through the Company's available cash and cash equivalents and internally-generated funds for the foreseeable future; however, a prolonged economic downturn or a decrease in the demand for the Company's products could adversely affect the long-term liquidity of the Company. In the event of a significant decrease in cash provided by the Company's operating activities, it might be necessary for the Company to obtain external sources of funding. The Company does not currently maintain a credit facility or any other external sources of long-term funding; however, management believes that such funding could be obtained on competitive terms.

Legal Proceedings

        The Company is a defendant in various lawsuits which are incidental to the Company's business. Management, after consultation with legal counsel, believes that the ultimate disposition of these matters will not have a material effect upon the Company's consolidated results of operations, financial position or liquidity.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

        Management's Discussion and Analysis of Financial Condition and Results of Operations and other sections of this Form 10-Q may contain forward-looking statements. Such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Such statements may relate but not be limited to projections of revenues, income or loss, capital expenditures, plans for growth and future operations, financing needs, product liability claims, as well as assumptions relating to the foregoing. Forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified. When used in "Management's Discussion and Analysis of Financial Condition and Results of Operations", and elsewhere in this Form 10-Q the words "estimates", "expects", "anticipates", "projects", "plans", "intends" and variations of such words and similar expressions are intended to identify forward-looking statements that involve risks and uncertainties. Future events and actual results could differ materially from those set forth in, contemplated by or underlying the forward-looking statements.

Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

        The Company conducts its business in several countries and intends to continue to expand its foreign operations. Sales revenue, operating income and net income are affected by fluctuations in currency exchange rates, interest rates and other uncertainties inherent in doing business and selling product in more than one currency. In addition, the Company's operations are exposed to risks associated with changes in social, political and economic conditions inherent in foreign operations, including changes in the laws and policies that govern foreign investment in countries where it has

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operations as well as, to a lesser extent, changes in United States laws and regulations relating to foreign trade and investment.

Foreign Currency Risk

        During the six months ended June 30, 2002, approximately 42 percent of the Company's revenue and expenses were realized outside of the United States. Inventory purchases are transacted primarily in U.S. dollars from vendors located in the United States. The local currency of each international subsidiary is considered the functional currency, and all sales and expenses are translated at average exchange rates for the reported periods. Therefore, the Company's sales revenue and expenses will be positively impacted by a weakening of the U.S. dollar and will be negatively impacted by a strengthening of the U.S. dollar. Given the uncertainty of exchange rate fluctuations, the Company cannot estimate the affect of these fluctuations on the Company's future business, product pricing, results of operations or financial condition. Changes in currency exchange rates affect the relative prices at which the Company sells its products. The Company regularly monitors its foreign currency risks and periodically takes measures to reduce the impact of foreign exchange rate fluctuations on the Company's operating results. The Company does not use derivative instruments for hedging, trading or speculating on foreign exchange rate fluctuations.

        The following table sets forth average currency exchange rates of one U.S. dollar into local currency for each of the countries in which sales revenue exceeded $10.0 million during any of the previous two years.

Interest Rate Risk

        The Company has investments, which by nature are subject to market risk. At June 30, 2002, the Company had investments totaling $10.7 million of which $4.3 million were equity investments and $6.4 million were municipal obligations, which carry fixed interest rates. Approximately $6.4 million mature between one and five years and carry a weighted average interest rate of 5.2 percent. A hypothetical one percent change in interest rates would not have a material affect on the Company's liquidity, financial condition or results of operations.

Item 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

        At the Company's Annual Meeting of Shareholders held on May 24, 2002, the stockholders re-elected the following persons to three-year terms to the Board of Directors:

        Pauline T. Hughes-Francis, Douglas Faggioli, Richard G. Hinckley and Eugene L. Hughes also serve as directors of the Company, and their terms of office continued after the Annual Meeting.

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PART II OTHER INFORMATION

Item 6. EXHIBITS AND REPORTS ON FORM 8-K

a)

Exhibits

b)

No report was filed on Form 8-K during the quarter for which this report is filed.

Other Items

        There were no other items to be reported under Part II of this Report.

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SIGNATURES

        Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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QuickLinks

PART I FINANCIAL INFORMATION
Item 1. FINANCIAL STATEMENTS

Item 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Item 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

PART II OTHER INFORMATION
Item 6. EXHIBITS AND REPORTS ON FORM 8-K