Want to maintain your Beautiful Soul? Jesse McCartney has some tips that might help.

The actor and singer-songwriter recently gave The Post an inside look at the health and wellness essentials that keep him feeling his best, whether at home or on the road.

And Just So You Know, not all of his must-haves will break the bank — in fact, one of McCartney’s top picks can be found at your local drugstore, and another may already be in your pantry.

Hot, cold, repeat

“When I have access, I love a cold plunge followed by the sauna ,” said McCartney, who kicked off “The Weightless Tour” this fall and is also joining the Jonas Brothers on their tour as a special guest.

The practice of alternating between hot and cold temperatures, known as contrast therapy , has been used for centuries but

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