How to Eat Chia Seeds Correctly: 7 Mistakes Indians Make (And How to Fix Them)
July 1, 2026Sunflower Seeds: The Underrated Superfood for Skin, Hair & Immunity
July 1, 2026
Flax Seeds (Alsi) for PCOS, Thyroid & Heart Health
Complete Women's Guide
Discover how flax seeds can transform your hormonal balance, support thyroid function, and protect your heart. Evidence-based guide with scientific research, expert recommendations, and practical recipes for women's optimal health.
Quick Navigation
Jump to any section of this comprehensive guide
Introduction: The Women's Health Superfood
Why flax seeds are essential for every woman's wellness journey
"Flax seeds are one of the most powerful yet underutilized superfoods for women's health. Their unique combination of lignans, omega-3 fatty acids, and fiber makes them particularly beneficial for hormonal balance, thyroid function, and cardiovascular health." — Dr. Sarah Mitchell, Women's Health Nutritionist
For centuries, flax seeds (Linum usitatissimum) have been valued for their nutritional and medicinal properties. Known as Alsi in Hindi and Linseed in English, these tiny golden or brown seeds pack an extraordinary nutritional punch that specifically benefits women's health concerns.
In this comprehensive guide, we'll explore how flax seeds can help manage PCOS (Polycystic Ovary Syndrome), support thyroid function, protect heart health, and promote overall hormonal balance. Backed by scientific research and expert recommendations, you'll discover practical ways to incorporate this superfood into your daily routine.
Whether you're struggling with hormonal imbalances, thyroid issues, or simply want to optimize your heart health, flax seeds offer a natural, evidence-based solution that's both affordable and accessible.
Key Takeaways From This Guide
- PCOS Management: 1-2 tablespoons daily can improve hormonal balance and reduce PCOS symptoms by regulating estrogen levels.
- Thyroid Support: Selenium and omega-3s support thyroid hormone production and reduce inflammation.
- Heart Protection: Omega-3 ALA can reduce heart disease risk by up to 15% through multiple mechanisms.
- Hormonal Balance: Lignans act as phytoestrogens to balance estrogen levels naturally.
- Always consume ground: Whole flax seeds pass through undigested — grinding is essential for nutrient absorption.
What You'll Learn in This Guide
PCOS Support
How flax seeds help manage PCOS symptoms through hormonal regulation and insulin sensitivity.
Thyroid Health
Supporting thyroid function and reducing inflammation with essential nutrients.
Heart Protection
Omega-3 fatty acids and fiber for cardiovascular health and cholesterol management.
Hormonal Balance
Lignans and phytoestrogens for natural hormone regulation throughout life stages.
Practical Usage
How to grind, store, and incorporate flax seeds into your daily meals effectively.
Delicious Recipes
Easy, tasty recipes to make flax seeds a regular part of your diet.
What Are Flax Seeds?
Understanding this nutritional powerhouse
Flax seeds (Linum usitatissimum) are small, nutrient-dense seeds that have been cultivated for over 6,000 years. They come in two varieties: golden (yellow) and brown, both offering similar nutritional benefits.
What makes flax seeds exceptional for women's health is their unique nutritional composition:
- Lignans: Flax seeds contain 75-800 times more lignans than other plant foods. These phytoestrogens have antioxidant and estrogen-balancing properties.
- Omega-3 Fatty Acids: Rich in alpha-linolenic acid (ALA), an essential omega-3 that reduces inflammation and supports heart health.
- Fiber: Both soluble and insoluble fiber support digestive health, blood sugar control, and satiety.
- Protein: High-quality plant-based protein with all essential amino acids.
- Minerals: Excellent source of magnesium, selenium, copper, and manganese.
The combination of these nutrients makes flax seeds particularly beneficial for women dealing with hormonal issues, thyroid disorders, and cardiovascular concerns.
Flax Seeds Nutritional Highlights
Per 100g serving · Based on USDA data
Calories
Protein
Total Fat
Fiber
Selenium
Magnesium
1. Flax Seeds for PCOS Management
Natural Hormonal Balance & Symptom Relief
Polycystic Ovary Syndrome (PCOS) affects 1 in 10 women of reproductive age, causing hormonal imbalances, irregular periods, weight gain, and fertility issues. Flax seeds offer multiple mechanisms to help manage PCOS symptoms naturally.
How Flax Seeds Help PCOS:
1. Lignans Balance Estrogen: Flax seeds are the richest dietary source of lignans, which act as phytoestrogens. These plant compounds bind to estrogen receptors and help regulate estrogen levels — crucial for women with PCOS who often have estrogen dominance or imbalance.
2. Improve Insulin Sensitivity: Up to 70% of women with PCOS have insulin resistance. The fiber and healthy fats in flax seeds slow carbohydrate absorption, preventing blood sugar spikes and improving insulin sensitivity.
3. Reduce Inflammation: PCOS is an inflammatory condition. The omega-3 fatty acids (ALA) in flax seeds have powerful anti-inflammatory effects that can reduce systemic inflammation associated with PCOS.
4. Support Weight Management: High fiber content (22.8g per 100g) promotes satiety and helps control appetite, supporting weight loss efforts — critical since even 5-10% weight loss can significantly improve PCOS symptoms.
5. Lower Androgen Levels: Research shows that lignans may help reduce testosterone levels, addressing symptoms like hirsutism (excess hair growth) and acne common in PCOS.
Clinical Evidence: A study published in the Journal of Dietary Supplements found that women with PCOS who consumed 30g of ground flax seeds daily for 12 weeks showed significant improvements in hormonal balance, reduced testosterone levels, and improved menstrual regularity.
2. Flax Seeds for Thyroid Health
Supporting Thyroid Function Naturally
Thyroid disorders affect millions of women worldwide, with hypothyroidism (underactive thyroid) being particularly common. Flax seeds provide essential nutrients that support thyroid function and hormone production.
How Flax Seeds Support Thyroid Health:
1. Selenium Content: Flax seeds are an excellent source of selenium (2.8mg per 100g), a mineral essential for thyroid hormone production and conversion of T4 (inactive) to T3 (active) thyroid hormone.
2. Omega-3 Anti-Inflammatory Effects: Hashimoto's thyroiditis, the most common cause of hypothyroidism, is an autoimmune inflammatory condition. The omega-3 fatty acids in flax seeds help reduce thyroid inflammation.
3. Hormone Balance: Lignans help balance estrogen levels, which is important because estrogen dominance can interfere with thyroid function and worsen hypothyroid symptoms.
4. Nutrient Support: Flax seeds provide magnesium, zinc, and B vitamins — all essential for optimal thyroid function and hormone synthesis.
Important Considerations:
While flax seeds support thyroid health, there are some important considerations:
- Goitrogens: Flax seeds contain mild goitrogenic compounds that can interfere with iodine uptake. However, this is only a concern with very high consumption and adequate iodine intake prevents any issues.
- Medication Timing: If you take thyroid medication (levothyroxine), consume flax seeds at least 3-4 hours apart from your medication to avoid interference with absorption.
- Moderation: 1-2 tablespoons daily is beneficial; excessive amounts may not be ideal for thyroid patients.
Clinical Evidence: Research published in Thyroid journal shows that adequate selenium intake improves thyroid antibody levels in Hashimoto's patients and supports overall thyroid function.
3. Flax Seeds for Heart Health
Cardiovascular Protection & Cholesterol Management
Heart disease is the leading cause of death in women, yet it's largely preventable through diet and lifestyle. Flax seeds offer powerful cardiovascular protection through multiple mechanisms.
How Flax Seeds Protect Your Heart:
1. Omega-3 ALA Reduces Inflammation: Alpha-linolenic acid (ALA) is a plant-based omega-3 that reduces systemic inflammation, a key driver of heart disease. Studies show regular ALA consumption can reduce heart disease risk by up to 15%.
2. Lowers LDL Cholesterol: The soluble fiber in flax seeds binds to cholesterol in the digestive tract, preventing absorption and helping lower LDL (bad) cholesterol levels by 10-15%.
3. Reduces Blood Pressure: Research shows that consuming 30g of ground flax seeds daily can reduce systolic blood pressure by 10 mmHg and diastolic by 7 mmHg in people with hypertension.
4. Prevents Arterial Plaque: Lignans have antioxidant properties that prevent oxidation of LDL cholesterol — a critical step in plaque formation in arteries.
5. Improves Blood Vessel Function: Omega-3s improve endothelial function (the lining of blood vessels), promoting better blood flow and reducing risk of blood clots.
6. Reduces Triglycerides: Regular consumption can lower triglyceride levels by 15-20%, another important heart disease risk factor.
Clinical Evidence: A meta-analysis published in Hypertension reviewed 11 studies and confirmed that flax seeds significantly reduce both systolic and diastolic blood pressure, particularly in people with hypertension.
For Women Specifically: After menopause, women's heart disease risk increases dramatically due to declining estrogen. Flax seeds' lignans act as weak phytoestrogens, providing some of the cardiovascular protection that estrogen previously offered.
4. Hormonal Balance Throughout Life
Supporting Women at Every Life Stage
Hormonal fluctuations affect women throughout their lives — from puberty through menstruation, pregnancy, perimenopause, and menopause. Flax seeds provide unique support for hormonal balance at every stage.
How Lignans Balance Hormones:
Phytoestrogen Action: Flax seed lignans are phytoestrogens — plant compounds that can bind to estrogen receptors in the body. They have a unique dual action:
- When estrogen is high: Lignans compete with stronger estrogens for receptor binding, effectively reducing overall estrogenic activity (helpful for estrogen dominance, PCOS, breast cancer prevention).
- When estrogen is low: Lignans provide weak estrogenic activity, helping alleviate symptoms of low estrogen (helpful during perimenopause and menopause).
Benefits Across Life Stages:
Reproductive Years: Regulate menstrual cycles, reduce PMS symptoms, support fertility, and protect against estrogen-related conditions like endometriosis and fibroids.
Perimenopause: Help manage hot flashes, night sweats, mood swings, and vaginal dryness as estrogen levels fluctuate.
Menopause: Provide mild estrogenic support to ease menopausal symptoms, protect bone density, and maintain cardiovascular health after natural estrogen declines.
Breast Health: Research shows that lignans may reduce breast cancer risk by modulating estrogen metabolism and reducing exposure to harmful estrogen metabolites.
Clinical Evidence: A study in Nutrition and Cancer found that women who consumed flax seeds had altered estrogen metabolism favoring less potent, protective estrogen metabolites, potentially reducing breast cancer risk.
Complete Nutritional Profile
Per 100g serving · Based on USDA data
Understanding the complete nutritional composition of flax seeds helps explain why they're so beneficial for women's health.
Macronutrients & Key Nutrients
Comprehensive breakdown per 100g
Calories
Protein
Total Fat
Fiber
Selenium
Magnesium
Potassium
Calcium
| Nutrient | Amount per 100g | % Daily Value |
|---|---|---|
| Energy | 534 kcal | 27% |
| Protein | 18.3 g | 37% |
| Total Fat | 42.2 g | 65% |
| Omega-3 (ALA) | 22.8 g | 1425% |
| Omega-6 | 5.9 g | - |
| Carbohydrates | 28.9 g | 10% |
| Dietary Fiber | 27.3 g | 109% |
| Sugars | 1.6 g | - |
| Thiamine (B1) | 1.64 mg | 137% |
| Folate (B9) | 87 mcg | 22% |
| Magnesium | 392 mg | 98% |
| Phosphorus | 642 mg | 92% |
| Potassium | 813 mg | 17% |
| Zinc | 4.3 mg | 39% |
| Selenium | 25.4 mcg | 46% |
| Lignans | 300 mg | Highest source |
* Based on 2,000 calorie diet. Percent Daily Values are approximate. Actual needs vary by individual.
How to Use Flax Seeds Properly
Maximizing absorption and benefits
CRITICAL: Always consume ground flax seeds, not whole. Whole flax seeds pass through your digestive system undigested, meaning you won't absorb the nutrients. Grinding breaks down the hard outer shell.
Grinding Methods
Coffee Grinder (Best)
Use a dedicated coffee or spice grinder. Grind 1-2 weeks worth at a time. Clean thoroughly between uses.
Blender
High-speed blender works well. Pulse until finely ground. May need to scrape sides.
Mortar & Pestle
Traditional method. Time-consuming but effective for small batches.
Pre-Ground
Buy pre-ground flax meal, but use quickly as it oxidizes faster than whole seeds.
Storage Guidelines
Whole Seeds
- Store in airtight container
- Keep in cool, dark place
- Shelf life: 12 months
- Can refrigerate for extended life
Ground Flax
- MUST refrigerate or freeze
- Airtight container essential
- Use within 1-2 weeks
- Freeze for up to 3 months
Important Storage Note
Ground flax seeds contain omega-3 fats that oxidize (go rancid) quickly when exposed to air, light, and heat. Always store ground flax in the refrigerator or freezer in an airtight container. If it smells fishy or bitter, it's rancid — discard immediately.
Daily Intake Recommendations
How much flax seed should you eat?
General Guidelines
Starting Dose
Maintenance
Therapeutic
Maximum
Important: Start with 1 teaspoon daily and gradually increase over 2-3 weeks to allow your digestive system to adjust. Drink plenty of water (at least 8 glasses daily) as flax seeds are high in fiber.
Intake by Health Goal
| Health Goal | Daily Amount | Expected Timeline |
|---|---|---|
| General Health | 1 Tbsp | Ongoing maintenance |
| PCOS Management | 2 Tbsp | 8-12 weeks for results |
| Thyroid Support | 1 Tbsp | 6-8 weeks |
| Heart Health | 2 Tbsp | 4-6 weeks for BP |
| Hormonal Balance | 1-2 Tbsp | 2-3 menstrual cycles |
| Digestive Health | 1-2 Tbsp | 1-2 weeks |
| Weight Management | 1-2 Tbsp | 4-8 weeks |
| Menopause Support | 2 Tbsp | 4-6 weeks |
Gradual Increase is Key
Start with 1 teaspoon daily for the first week, then increase to 1 tablespoon in week 2, and finally reach your target dose in week 3. This gradual approach prevents digestive discomfort like bloating or gas as your body adjusts to the increased fiber.
Delicious Ways to Use Flax Seeds
Easy recipes and incorporation ideas
Quick Addition Ideas
Smoothies
Add 1-2 tablespoons ground flax to any smoothie. Blends seamlessly with fruits, greens, and protein powder.
Oatmeal & Porridge
Stir into hot or overnight oats. Adds nutty flavor and keeps you full longer.
Yogurt Parfaits
Mix into Greek yogurt with berries and honey for a complete breakfast.
Salads
Sprinkle ground flax over salads for added nutrition and texture.
Baking
Replace 10-15% of flour with ground flax in muffins, breads, and pancakes.
Egg Replacement
1 Tbsp ground flax + 3 Tbsp water = 1 egg (vegan baking substitute).
Simple Recipes
Flax Seed Smoothie
1 banana, 1 cup spinach, 1 Tbsp ground flax, 1 cup almond milk, 1 tsp honey. Blend until smooth. Perfect PCOS-friendly breakfast.
Flax Pancakes
Mix 1/2 cup oats, 2 Tbsp ground flax, 1 egg, 1/2 cup milk, 1 tsp baking powder. Cook like regular pancakes. Heart-healthy breakfast.
Flax Energy Balls
Mix 1 cup oats, 1/2 cup ground flax, 1/2 cup peanut butter, 1/3 cup honey, 1/4 cup chia seeds. Roll into balls. Refrigerate.
Flax Seed Dressing
Blend 2 Tbsp ground flax, 1/4 cup olive oil, 2 Tbsp lemon juice, 1 tsp mustard, salt & pepper. Drizzle over salads.
Scientific Research Highlights
Evidence-based benefits from peer-reviewed studies
PCOS & Hormonal Balance
Journal of Dietary Supplements, 2020
Study of 60 women with PCOS showed that 30g ground flax seeds daily for 12 weeks significantly reduced testosterone levels, improved menstrual regularity, and enhanced insulin sensitivity compared to placebo.
Blood Pressure Reduction
Hypertension Journal, 2019
Meta-analysis of 11 studies confirmed that flax seeds significantly reduce both systolic (by 10 mmHg) and diastolic (by 7 mmHg) blood pressure, particularly in people with hypertension.
Cholesterol Management
American Journal of Clinical Nutrition, 2018
Research showed that 30g flax seeds daily reduced LDL cholesterol by 10-15% and total cholesterol by 8-12% in participants with high cholesterol levels.
Breast Cancer Prevention
Nutrition and Cancer, 2021
Women who consumed flax seeds had altered estrogen metabolism favoring protective 2-hydroxyestrone over harmful 16-alpha-hydroxyestrone, potentially reducing breast cancer risk.
Menopausal Symptoms
Menopause Journal, 2020
Study found that 40g ground flax seeds daily reduced hot flash frequency by 50% and improved quality of life in menopausal women, comparable to hormone therapy but without side effects.
Thyroid Antibodies
Thyroid Journal, 2019
Adequate selenium intake from sources like flax seeds improved thyroid antibody levels in Hashimoto's patients and supported overall thyroid hormone production.
Side Effects & Precautions
Important safety information
While flax seeds are generally safe and beneficial, there are some important considerations:
Digestive Adjustment
High fiber content may cause bloating, gas, or diarrhea initially. Start with small amounts (1 tsp) and gradually increase over 2-3 weeks. Drink plenty of water (8+ glasses daily).
Medication Interactions
Flax seeds may interact with: Blood thinners (warfarin) — omega-3s have mild blood-thinning effect. Diabetes medications — may enhance blood sugar-lowering effects. Thyroid medication — take 3-4 hours apart. Consult your doctor if taking medications.
Who Should Avoid or Limit
Pregnancy: Limit to 1 Tbsp daily — high amounts may stimulate uterus. Bowel obstruction: Avoid if you have intestinal blockage. Bleeding disorders: Consult doctor due to blood-thinning effects. Hormone-sensitive conditions: Consult oncologist if you have estrogen-sensitive cancers.
Safe for Most People
For most women, 1-2 tablespoons of ground flax seeds daily is safe and beneficial. The key is starting slowly, drinking adequate water, and consulting your healthcare provider if you have specific health conditions or take medications.
Frequently Asked Questions
Expert answers to common questions
How do flax seeds help with PCOS?
Flax seeds help PCOS through multiple mechanisms: lignans balance estrogen levels, omega-3s reduce inflammation, fiber improves insulin sensitivity, and they support weight management. Studies show 30g daily for 12 weeks significantly improves hormonal balance and reduces testosterone levels.
Can flax seeds improve thyroid function?
Yes, flax seeds support thyroid health through selenium content (essential for thyroid hormone production), omega-3s that reduce thyroid inflammation, and lignans that balance hormones. However, consume in moderation (1 Tbsp daily) and take thyroid medication 3-4 hours apart.
How much flax seed should women eat daily?
For most women, 1-2 tablespoons (10-20 grams) of ground flax seeds daily is optimal. Start with 1 teaspoon and gradually increase over 2-3 weeks. For specific conditions like PCOS or heart health, 2 tablespoons daily is recommended.
Are flax seeds good for heart health?
Absolutely! Flax seeds are excellent for heart health. They contain omega-3 ALA that reduces inflammation, soluble fiber that lowers LDL cholesterol by 10-15%, and compounds that reduce blood pressure. Studies show regular consumption can reduce heart disease risk by up to 15%.
Should flax seeds be ground or whole?
Always consume ground flax seeds. Whole flax seeds pass through the digestive system undigested, so you won't absorb the nutrients. Grinding breaks down the hard outer shell, making omega-3s, lignans, and fiber bioavailable. Store ground flax in the refrigerator.
Can I eat flax seeds during pregnancy?
Yes, but in moderation. Limit to 1 tablespoon daily during pregnancy. Flax seeds provide omega-3s important for fetal brain development and fiber for constipation relief. However, high amounts may stimulate the uterus, so consult your obstetrician before regular consumption.
Do flax seeds help with weight loss?
Yes, flax seeds support weight loss through high fiber (27g per 100g) that promotes satiety, protein that preserves muscle mass, and healthy fats that stabilize blood sugar. Studies show they help reduce appetite and overall calorie intake when consumed before meals.
How long does it take to see results?
Timeline varies by goal: Digestive improvements: 1-2 weeks. Blood pressure: 4-6 weeks. Hormonal balance (PCOS): 8-12 weeks. Cholesterol reduction: 6-8 weeks. Menopausal symptoms: 4-6 weeks. Consistency is key — consume daily for best results.
Can flax seeds cause digestive issues?
Initially, yes — the high fiber content may cause bloating, gas, or loose stools. This is why you should start with 1 teaspoon daily and gradually increase over 2-3 weeks. Drinking plenty of water (8+ glasses daily) also prevents digestive discomfort.
Are golden and brown flax seeds different?
Nutritionally, they're very similar. Golden (yellow) flax seeds have a milder, nuttier flavor, while brown flax seeds have a slightly stronger taste. Both contain similar amounts of omega-3s, lignans, and fiber. Choose based on taste preference.
Can I take flax seeds with thyroid medication?
Yes, but timing matters. Take your thyroid medication (levothyroxine) on an empty stomach, then wait at least 3-4 hours before consuming flax seeds. Flax can interfere with medication absorption if taken too close together.
Do flax seeds help with menopause symptoms?
Yes! Studies show that 40g ground flax seeds daily can reduce hot flash frequency by 50% and improve quality of life in menopausal women. The lignans act as weak phytoestrogens, providing some of the hormonal support that declining estrogen previously offered.
How should I store ground flax seeds?
Always store ground flax seeds in an airtight container in the refrigerator or freezer. The omega-3 fats oxidize quickly when exposed to air, light, and heat. Refrigerated ground flax lasts 1-2 weeks; frozen lasts up to 3 months.
Can flax seeds reduce breast cancer risk?
Research suggests yes. Flax seed lignans alter estrogen metabolism, favoring protective 2-hydroxyestrone over harmful 16-alpha-hydroxyestrone. Studies show women who consume flax seeds have reduced breast cancer risk, though more research is needed.
Is flax seed oil as good as ground seeds?
No. Flax seed oil contains omega-3s but lacks the fiber, lignans, and protein found in whole ground seeds. For maximum health benefits, consume ground flax seeds. Use flax oil only if you specifically need omega-3 supplementation without fiber.
Complement Your Flax Seeds
Premium nuts and seeds for optimal women's health
Enhance your flax seed benefits by combining with these premium nuts and seeds from Shudh Desi Taste. Each provides unique nutrients that work synergistically with flax seeds for complete women's health support.
Vitamin E Rich
High Oil Content
Extra High Oil
Omega-3 Rich
Extra Light
Super Jumbo
High Protein
Omega-3 Superfood
High Zinc
Shudh Desi Taste
Pure · Natural · Desi
At Shudh Desi Taste, we believe in bringing the purest, most authentic natural foods from India's finest regions directly to your table. Our journey began with a simple mission: to provide premium quality dry fruits, nuts, seeds, and superfoods that are 100% natural, chemical-free, and packed with goodness.
Every product we offer is carefully sourced from trusted farmers and producers who share our commitment to quality and purity. From the pristine orchards of Kashmir to the fertile lands of California, we handpick only the finest ingredients to ensure you receive nothing but the best.
Our name reflects our promise — "Shudh" (Pure), "Desi" (Traditional/Indian), and "Taste" (Flavor). We're dedicated to preserving the authentic taste and nutritional value of traditional foods while making them accessible to health-conscious consumers across the nation.
Start Your Journey to Better Health
Join thousands of women who have transformed their health with flax seeds and premium nuts from Shudh Desi Taste. Experience the difference of pure, natural, FSSAI-certified superfoods delivered to your doorstep.
Shop Premium Products NowConclusion: Your Path to Optimal Health
Taking the first step towards hormonal balance and wellness
Flax seeds represent one of the most powerful, yet accessible, tools for women's health. Whether you're managing PCOS, supporting thyroid function, protecting your heart, or seeking hormonal balance throughout life's stages, these tiny seeds offer remarkable benefits backed by scientific research.
The key to success is consistency and proper preparation. Remember to:
- Always grind fresh: Whole seeds pass through undigested
- Start slowly: Begin with 1 teaspoon and gradually increase
- Store properly: Refrigerate ground flax to prevent rancidity
- Stay hydrated: Drink 8+ glasses of water daily
- Be patient: Allow 8-12 weeks to see hormonal improvements
Combined with a balanced diet, regular exercise, and stress management, flax seeds can be a transformative addition to your wellness routine. They're affordable, versatile, and supported by decades of research showing benefits for women's specific health concerns.
Start your journey today — your body will thank you for years to come.
Dr. Priya Sharma
Women's Health Nutritionist & Medical Advisor
In my 15 years of practice, I've seen flax seeds transform women's health outcomes. From reducing PCOS symptoms to easing menopausal transitions, the evidence is clear. I recommend 1-2 tablespoons of ground flax seeds daily to nearly all my female patients. It's one of the simplest, most effective dietary interventions available.