In a meta-analysis of 61 intervention studies looking at the effects of a variety of tree nuts on heart health, researchers found significant improvements in the lipoproteins which increase the risk of atherosclerosis with just one serving each day. While this study focused on almonds, walnuts, hazelnuts, cashews and pistachios; peanuts, which are technically legumes may have similar benefits–and are much cheaper.
PositiveTip: The evidence for the benefits of tree nuts is strong. Are you including them in your diet regularly?