Investing in mutual funds for retirement is never too late. And the Zacks Mutual Fund Rank can be an excellent tool for investors looking to invest in the best funds.

The easiest way to judge a mutual fund's quality over time is by analyzing its performance, diversification, and fees. Using the Zacks Mutual Fund Rank of over 19,000 mutual funds, we've identified three outstanding mutual funds that are ideally suited to help long-term investors pursue and achieve their retirement investing goals.

Let's break down some of the mutual funds with the top Zacks Mutual Fund Rank and the lowest fees.

Fidelity Select Health Care (FSPHX Quick QuoteFSPHX - Free Report) : 0.68% expense ratio and 0.52% management fee. FSPHX is a Sector - Health mutual fund, which give investors an opportunity to focus on healthcare, one of the largest sectors of the American economy. FSPHX has achieved five-year annual returns of an astounding 11.3%.

Ivy Large Cap Growth A (WLGAX Quick QuoteWLGAX - Free Report) is a stand out amongst its peers. WLGAX is a Large Cap Growth mutual fund, and these funds invest in many large U.S. firms that are projected to grow at a faster rate than their large-cap peers. With five-year annualized performance of 11.57%, expense ratio of 0.96% and management fee of 0.6%, this diversified fund is an attractive buy with a strong history of performance.

Victory Sycamore Established Value R6 (VEVRX Quick QuoteVEVRX - Free Report) is an attractive large-cap allocation. VEVRX is a Mid Cap Value mutual funds that aims to target medium-sized companies that possess strong value and income opportunities for investors. VEVRX has an expense ratio of 0.54%, management fee of 0.45%, and annual returns of 10.06% over the past five years.

We hope that your investment advisor (if you use one) has you invested in one or all of the top-ranked mutual funds we've reviewed. But if that isn't the case, it might be time to have a conversation or reconsider this vitally important relationship.