After following more than a thousand South Florida beachgoers for a year, experts at the University of Miami discovered an alarming trend among people who frequently swam in the ocean. Compared to non-swimmers, those who spent time in the water experienced more gastrointestinal illness, more respiratory problems, and a significantly higher rate of skin disorders, even though beach areas were clean and the water unpolluted.

The culprit? Microscopic bacteria that thrive in the sub-tropical water temperatures. Such bacteria can enter the body through ingestion or skin contact and could potentially upset the healthy balance of bacteria in the digestive tract, which is essential for optimal digestion and immune function.

Experts warn that the harmful bacteria may pose a particular threat for children as well as older adults who may be lacking in healthy gut bacteria, and recommend taking the following precautions if planning a day at the beach:

• Avoid swallowing ocean water.
• Do not swim if you are ill, have diarrhea or open wounds.
• Shower and wash your hands before and after swimming.
• Take children on frequent bathroom breaks/diaper changes.

Research also shows that taking a daily high-potency probiotic supplement can help boost the numbers of good bacteria in the gut and help ward off potential harmful invaders. As a general rule, adults should look for supplement with at least 15 billion active cultures per once-daily serving.

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New research suggests that adding more Omega-3s to the diet may help prevent vision loss in older adults. Doctors at the National Eye Institute in Maryland recently concluded a 12-year study of more than 1,800 adults, all of whom had early signs of age-related macular degeneration (AMD). What they found was that those who consumed the most Omega-3 fatty acids—particularly EPA and DHA—were “30 percent less likely than their peers” to develop an advanced form of AMD. Why? Read more to find out about the health-promoting benefits of Omega-3s.

How Do I Get More Omega-3s?

Healthy Omega-3 fats are found naturally in fish, flaxseed oil, walnuts and some dark green, leafy vegetables. Experts recommend at least 1,000 mg daily for overall health (including enhanced digestion), so if you have trouble getting enough Omega-3s through diet alone, a natural fish oil supplement can help boost your daily intake. Look for an ultra-concentrated formula with enteric-coated capsules and added lipase to help prevent any fishy aftertaste or burping.

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