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 best way to shortlist great mutual funds is to ensure solid performance, diversification, and low fees. Some are better than others, but utilizing the Zacks Mutual Fund Rank, we have identified three mutual funds that could be solid additions to one's retirement portfolio.

Let's take a look at some of our top-ranked mutual funds with the lowest fees.

American Funds Global Growth F2 (PGWFX) has a 0.12% expense ratio and 0% management fee. PGWFX is a Global - Equity mutual fund investing in bigger markets like the U.S., Europe, and Japan; these kinds of funds aren't limited by geography. With yearly returns of 9.4% over the last five years, this fund clearly wins.

MFS Blended Research Intl Eq R6 (BRXVX Quick QuoteBRXVX - Free Report) . Expense ratio: 0.57%. Management fee: 0.5%. BRXVX is a Non US - Equity option, focusing their investments acoss emerging and developed markets, and can often extend across cap levels too. This fund has managed to produce a robust 12.73% over the last five years.

Voya Corporate Leaders 100 C (VYCBX): 1.32% expense ratio and 0.47% management fee. VYCBX is a part of the Large Cap Value category, and invests in equities with a market capitalization of $10 billion or more, but whose share prices do not reflect their intrinsic value. With a five-year annual return of 13.2%, this fund is a well-diversified fund with a long track record of success.

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.