Adding flaxseed to the diet might increase the number of bowel movements each day. It might also cause gastrointestinal (GI) side effects such as bloating, gas, abdominal pain, constipation, diarrhea, stomachache, and nausea. Higher doses are likely to cause more GI side effects. Flax seeds can be beneficial for weight loss because of their unique nutritional properties. While they carry real benefits, they're not a magic ingredient. Flax seeds work best as a complement to a healthy diet and exercise routine, not in place of one. Flaxseed is a reliable source of B vitamins, a group of nutrients that are known for making your hair grow stronger and healthier at a more rapid rate. Vitamin E. ... When it comes to hair health, vitamin E reduces the effects of free radicals on your scalp, thereby promoting hair growth.