Some researchers think that studies showing no link between sugar-related compounds in blood and heart problems might be missing from the research — especially smaller ones — which could skew what we think is true.

Studies looking at sugar-related substances in the blood and heart problems don’t agree very well with each other — the results vary a lot, possibly because of different people, methods, or hidden factors.

The studies didn’t seem to be hiding negative results, but the smaller ones showed odd patterns that might mean some results weren’t fully reported.

Studies that found a link between saturated fat and heart disease are more likely to get published than those that found no link — which might make it look like there’s a connection when there isn’t.

Even if some studies with negative results were missing, the overall finding that eating more fruits and veggies is linked to living longer still holds up.

There’s no sign that only studies showing benefits of leafy greens were published—so the results probably aren’t biased by hiding negative findings.