Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of USANA Health Sciences (NYSE:USNA) were looking stronger today, gaining as much as 10% after the company beat earnings estimates in its quarterly report.

So what: The nutritional and personal-care products maker said earnings per share jumped 42% to $1.28, ahead of the analyst consensus at $1.12. Management reported a 9.7% increase in sales to $169.1 million and a decrease in associate incentive payouts -- which came from a change in the employee matching program -- helped drive the strong earnings growth. An aggressive share buyback program also helped lift per-share profits as the number of shares outstanding decreased by nearly 10% from a year ago.

Now what: Revenue actually missed analyst estimates, but the market seemed to be ignoring that as USANA also raised its EPS guidance for the year to $5.25-$5.40 from $5.10-$5.25, roughly the amount of its earnings beat this quarter. Its new EPS guidance is ahead of analyst estimates at $5.18, but the midpoint of revenue guidance, which was kept at $700 million to $720 million is slightly below the Street's view at $714 million. Considering, the bulk of today's EPS growth came from buybacks and the change in the matching program, I see little reason to change your investing thesis, or in the company's prospects. Shares seem fairly priced after today's jump.

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Fool contributor Jeremy Bowman has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.