Isabgol (Psyllium Husk): Calories, Fiber and Health Facts

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Isabgol, also sold as psyllium husk, has about 30 calories and 7 g of fiber in a 9 g tablespoon, with almost no protein, fat or sugar. It is a soluble, gel-forming fiber that is taken for regularity and cholesterol, and it must be mixed with a full glass of water.

Quick Nutrition Facts

Per 1 tablespoon (9 g)

Nutrient	Amount
Calories	30 kcal
Protein	0g
Carbohydrates	8g
Fiber	7g
Sugars	0g
Fat	0g
Sodium	5 mg

Macronutrient Breakdown

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NUTRITIONIST'S INSIGHT

Count isabgol as a fiber supplement, not a food that adds calories. A tablespoon is 30 kcal and 7 g fiber, so almost nothing reaches your blood as sugar. The FDA allows a heart-health claim at 7 g of soluble fiber a day from psyllium husk, which takes about 10 g of husk a day, or three of the 1-teaspoon label servings. Start with a teaspoon in a full glass of water, add a second glass through the day, and raise the dose over two weeks. Take it 2 hours apart from prescription tablets, because the gel can slow their absorption.

Myth Busters

MYTH #1: Isabgol is only for constipation.

TRUTH: It is also an authorized heart-health ingredient. The FDA permits a label claim that 7 g a day of soluble fiber from psyllium husk, in a diet low in saturated fat and cholesterol, may reduce the risk of heart disease, and trials show it lowers LDL cholesterol. 21 CFR 101.81: Health claims, soluble fiber from certain foods and risk of coronary heart disease; Psyllium supplementation and lipid profiles: systematic review and dose-response meta-analysis of RCTs

MYTH #2: Isabgol makes you gain weight because it swells in the stomach.

TRUTH: A tablespoon has about 30 calories and almost no digestible sugar or fat. The swelling is water held by the fiber, not stored energy. Calories come from what you mix it into, such as sweetened juice or flavored powders with added sugar. Eat This Much: 1 level tbsp Now psyllium husk powder nutrition facts; DailyMed: Psyllium Fiber Powder supplement facts and heart-disease claim (Marlex)

MYTH #3: You can take isabgol dry with a sip of water.

TRUTH: Product labels warn that taking psyllium without enough fluid may cause it to swell and block the throat or esophagus. Mix each dose with at least 8 ounces of liquid, drink it promptly, and do not use it if you have trouble swallowing. DailyMed: Daily Fiber Sugar Free psyllium husk powder label (Raritan Pharmaceuticals)

MYTH #4: More isabgol always lowers blood sugar more.

TRUTH: The effect on blood glucose is modest and strongest in people whose glucose control is already impaired. Meta-analyses of randomized trials report lower fasting glucose and HbA1c in people with type 2 diabetes, not a large effect in healthy people. Higher doses mainly add bloating. Psyllium fiber improves glycemic control proportional to loss of glycemic control: a meta-analysis; The effect of psyllium on fasting blood sugar, HbA1c, HOMA-IR and insulin: GRADE-assessed systematic review and meta-analysis of RCTs

MYTH #5: Isabgol lowers blood pressure.

TRUTH: A meta-analysis of trials found psyllium reduced total and LDL cholesterol but produced no significant change in blood pressure. The effect of psyllium supplementation on blood pressure: systematic review and meta-analysis

NutriScore by Health Goals

Health Goal	NutriScore	Why This Score?
Weight Loss		Thirty calories a tablespoon and a gel that adds bulk make it easy to fit in a deficit. It will not cause weight loss by itself, so the grade stays at B. Eat This Much: 1 level tbsp Now psyllium husk powder nutrition facts; DailyMed: Daily Fiber Sugar Free psyllium husk powder label (Raritan Pharmaceuticals)
Muscle Gain		There is no meaningful protein and few calories. It has no role in building muscle beyond helping digestion. Eat This Much: 1 level tbsp Now psyllium husk powder nutrition facts
Diabetes Management		Almost no digestible carbohydrate, and randomized trials show lower fasting glucose and HbA1c. It supports a diabetes plan but does not replace medication. Psyllium fiber improves glycemic control proportional to loss of glycemic control: a meta-analysis; The effect of psyllium on fasting blood sugar, HbA1c, HOMA-IR and insulin: GRADE-assessed systematic review and meta-analysis of RCTs
Heart Health		The FDA recognizes 7 g a day of soluble fiber from psyllium husk in a low saturated fat diet, and trials show lower LDL cholesterol. 21 CFR 101.81: Health claims, soluble fiber from certain foods and risk of coronary heart disease; Psyllium supplementation and lipid profiles: systematic review and dose-response meta-analysis of RCTs
Low Carb / Keto		One tablespoon has about 1 g net carbs because 7 of its 8 g carbs are fiber. Eat This Much: 1 level tbsp Now psyllium husk powder nutrition facts

PERSONALIZED NUTRITION

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Blood Sugar Response to Isabgol (Psyllium Husk)

Plain isabgol has about 1 g of net carbohydrate per tablespoon, so the fasting baseline barely moves. The small rise reflects the water or juice it is mixed in. Taken before or with a meal, the gel can slow how fast that meal's carbohydrate is absorbed. Psyllium fiber improves glycemic control proportional to loss of glycemic control: a meta-analysis; Eat This Much: 1 level tbsp Now psyllium husk powder nutrition facts

Estimated Blood Sugar Response (1 tablespoon in water)

Illustrative curve for plain husk in water, not a measured CGM trace. Sweetened or flavored powders and juice mixers raise it.

How to flatten the spike

Mix 1 teaspoon to 1 tablespoon in at least 8 oz of water and drink it right away before it thickens.
Take it 10 to 15 minutes before a carbohydrate-rich meal to help slow glucose absorption.
Choose unsweetened, unflavored husk; sugar-sweetened powders add 8 g sugar per 12 g serving.
Add a second glass of water later in the day and raise the dose gradually over two weeks.

Cultural Significance

Isabgol is the Hindi and Urdu name for the husk of Plantago ovata seeds, grown mainly in Gujarat and Rajasthan, with India supplying most of the world's psyllium. The name comes from Persian words for horse ear, after the seed's shape. In Indian homes it is stirred into cold water, milk or buttermilk (chaas) at night for regularity, and into sharbat or falooda as a cooling drink. Outside India it is sold as psyllium husk and Metamucil-type fiber, and baking with it gives gluten-free bread its stretch.

Compare & Substitute

Isabgol (Psyllium Husk) vs Similar Foods

Nutrient	Ground flaxseed (1 tbsp, 7 g)	Chia seeds (1 tbsp, 12 g)	Oat bran (1 tbsp, 7 g)
Calories	37 kcal	58 kcal	17 kcal
Protein	1.3g	2g	1.2g
Carbohydrates	2g	5g	4.6g
Fat	3g	3.7g	0.5g

Frequently Asked Questions

How many calories are in a tablespoon of isabgol?

A level tablespoon (about 9 g) of plain psyllium husk powder has about 30 calories, 8 g carbs and 7 g fiber. Flavored, sugar-sweetened powders have more: one orange-flavor product lists 45 calories per 12 g.

Is isabgol the same as psyllium husk?

Yes. Isabgol is the Hindi name for psyllium husk, the seed coat of Plantago ovata. Whole husk and finer husk powder have the same nutrition per gram, but the powder is denser, so a tablespoon of powder weighs more than a tablespoon of whole husk.

How much isabgol should I take a day?

Over-the-counter labels list 1 rounded teaspoon (about 3.4 g husk) up to three times daily. The FDA heart-health claim uses 7 g of soluble fiber a day. New users should start with one serving and increase over time.

Does isabgol spike blood sugar?

No. Plain husk has about 1 g net carbs per tablespoon, and trials show it lowers fasting glucose and HbA1c in people with type 2 diabetes. Sweetened powders and juice mixers can raise glucose.

What are the safety precautions for isabgol?

Mix every dose with at least 8 oz of liquid, because taking it dry may cause choking. Do not use it if you have difficulty swallowing, take other medicines 2 hours before or after it, and stop and see a doctor if constipation lasts more than 7 days or you have rectal bleeding.