Probiotic foods and supplements can be pricey, and it's hard to cut through the clever marketing to know what's worth buying, and what's best left on the shelf.

In the fifth episode of a brand new series of our health and wellbeing podcast, we sit down with Shefalee Loth, a public health nutritionist at Which?, and Sophie Medlin, founder of City Dietitians to explain what probiotics are and who should consider adding them into their daily routine.

Plus, for the first time ever, Which? has tested and reviewed probiotic supplements from a range of suppliers. We reveal some of the best on the market, plus which of those received the coveted Which? Best Buy.

Which? members can listen to the full episode where we reveal our test results by clicking here.

If you're not already a member, join Which? to instantly listen to the podcast and gain access to all of our product reviews - all for 50% off your first year's membership.

Read all of our reviews of probiotic supplements & sign up for our free monthly Food & Health newsletter