Flaxseed, also known as Linum usitatissimum, is a powerful food crop rich in dietary fiber and omega-3 fatty acids, particularly alpha-linolenic acid. It also contains lignans, which are phytoestrogens similar to estrogen. One dangerous condition that flaxseed may help manage is high cholesterol, a leading contributor to heart disease.
Taking flaxseed by mouth appears to reduce total cholesterol and low-density lipoprotein (LDL or “bad”) cholesterol, especially in people who are overweight or already have high cholesterol.
While its effect on triglyceride levels is unclear, its benefits for LDL reduction are promising. Ground flaxseed used over at least 12 weeks seems to offer the best results.
In addition to lowering cholesterol, flaxseed may also slightly lower blood pressure, reduce blood sugar in people with type 2 diabetes, and aid in weight loss.
However, flaxseed can act like estrogen and may not be safe during pregnancy or for people with hormone-sensitive conditions. It may also interact with medications for diabetes, blood pressure, and blood clotting.
Despite potential side effects such as bloating or nausea, consuming 20–30 grams of flaxseed daily mixed with food is generally safe. Always consult a healthcare provider before use.