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.

How can you tell a good mutual fund from a bad one? It's pretty basic: if the fund is diversified, has low fees, and shows strong performance, it's a keeper. Of course, there's a wide range, but using the Zacks Mutual Fund Rank, we've found three mutual funds that would be great additions to any long-term investors' portfolios.

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

NYLI Epoch Global Equity Yield Inv (EPSIX Quick QuoteEPSIX - Free Report) : 1.17% expense ratio and 0.7% management fee. EPSIX is a Global - Equity mutual fund. These funds invest in large markets like the U.S., Europe, and Japan, and operate with very few geographical limitations With annual returns of 12.49% over the last five years, this fund is a winner.

Janus Henderson Global Life Science I (JFNIX): 0.77% expense ratio and 0.64% management fee. JFNIX is a Sector - Health mutual fund, which give investors an opportunity to focus on healthcare, one of the largest sectors of the American economy. JFNIX, with annual returns of 6.23% over the last five years, is a well-diversified fund with a long track record of success.

Invesco Small Cap Value A (VSCAX): 1.06% expense ratio and 0.63% management fee. VSCAX is a Small Cap Value mutual fund, investing in small companies with stock market valuation less than $2 billion. The fund is mainly invested in equities, has a long reputation of salutary performance, and has yearly returns of 25.86% over the last five years.

There you have it. If your financial advisor had you put your money into any of our top-ranked funds, then they've got you covered. If not, you may need to talk.