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Is psyllium better than oatmeal?

Both psyllium and oatmeal are great sources of fiber and have health benefits. But is one better than the other? Here we’ll compare psyllium vs oatmeal looking at fiber content, effects on cholesterol, blood sugar, weight loss, and more.

Fiber content

Psyllium is composed almost entirely of dietary fiber, containing about 70-80% soluble fiber by weight. Oats contain about 10-15% fiber. So psyllium provides a much more concentrated source of fiber.

Just 1 tablespoon of psyllium husk powder contains about 5 grams of fiber. To get the same amount from oatmeal, you’d need to eat about 1 cup of cooked oatmeal. So if you’re looking just to increase your fiber intake, psyllium can provide that with a much smaller serving size.

Soluble fiber effects

Both psyllium and oatmeal provide soluble fiber that forms a gel-like consistency when mixed with water. This helps slow digestion, make you feel full, and regulate blood sugar levels.

Many studies show psyllium is very effective at lowering LDL “bad” cholesterol levels. The viscous fiber binds to cholesterol and removes it from the body before it can be absorbed. Oats can also help reduce cholesterol, but seem to be less potent in this effect than psyllium.

For controlling blood sugar in diabetes, oatmeal may have an edge over psyllium. Oats contain beta-glucan fiber that’s been shown to reduce blood glucose spikes after meals. But psyllium can also help with glycemic control.

Weight loss

Both psyllium and oatmeal can aid weight loss by promoting feelings of fullness and helping control appetite and calorie intake. Psyllium husk absorbs water and expands in the stomach, helping to increase satiety.

One study had participants take either psyllium or oat bran. After 3 months, the psyllium group lost significantly more weight than the oat bran group. The researchers concluded psyllium is more effective for weight loss than oat bran.

But oatmeal still has great benefits for weight loss too. It provides a nutritious filling breakfast that can prevent overeating later in the day.

Other health benefits

Here are some other potential health benefits of psyllium and oatmeal:

Psyllium benefits

  • Relieves constipation and promotes regularity
  • May help lower blood pressure
  • Reduces risk of heart disease and diabetes
  • Lowers risk of colorectal cancer

Oatmeal benefits

  • Stabilizes blood sugar and reduces risk of diabetes
  • Provides nutrients like B vitamins, iron, and antioxidants
  • May lower risk of heart disease
  • Promotes gut health with prebiotics

Nutritional profile

Here is a comparison of the nutritional profile of psyllium vs oats in a typical serving size of 1 tablespoon husk powder or 1 cup cooked oatmeal:

Nutrient Psyllium (1 tbsp) Oatmeal (1 cup)
Calories 15 166
Fat 0g 2.6g
Carbs 8g 27g
Fiber 5g 4g
Sugars 0g 1g
Protein 0g 5.9g

As you can see, psyllium is very low in calories and carbohydrates. It also lacks protein unlike oatmeal which provides a good source of plant-based protein.

Possible side effects

Psyllium and oatmeal are generally very safe and do not have serious side effects for most people. However, some possible side effects to be aware of include:


  • Gas or bloating
  • Stomach cramping
  • Allergic reaction (rare)
  • Difficulty swallowing if taking dry powder


  • Bloating or flatulence
  • Allergic reaction in those sensitive to oats

To reduce side effects, make sure to drink plenty of water with high fiber foods. Start with small doses and gradually increase over time. This allows the digestive system to adjust.

Cost comparison

Psyllium husk powder is more expensive per ounce compared to oats. But since you need a much smaller serving size of psyllium to get an equivalent amount of fiber, the cost per serving works out to be quite comparable.

Some approximate costs are:

  • Psyllium (1 lb bag): $10-15 / approx 60 tbsp servings = about $0.15-0.25 per serving
  • Oats (42 oz container): $5 / approx 28 cup servings = about $0.18 per serving

So psyllium requires a smaller serving size to get 5g of fiber. But the cost per serving is very similar between the two options.

How to use psyllium vs oatmeal

Here are some tips for incorporating psyllium and oatmeal into your diet:

Psyllium husk

  • Mix 1-2 teaspoons into water, juice, yogurt, oatmeal, or smoothies
  • Bake into breads, muffins, and other baked goods
  • Sprinkle on cereals or yogurt
  • Take capsules with water if you don’t like the texture


  • Enjoy as a hot cereal cooked with milk or water
  • Add to smoothies or yogurt parfaits
  • Use in muffins, cookies, energy bars
  • Use as breading for oven-baked chicken or fish


In conclusion, psyllium and oatmeal both provide great health benefits and lots of fiber. Psyllium offers a very concentrated source of soluble fiber, while oatmeal provides more overall nutrition.

For specifically lowering cholesterol levels, aiding weight loss, and relieving constipation, studies show psyllium may be more effective. But oatmeal has benefits for blood sugar control, gut health, and as a nutritious meal.

Ideally, incorporate both into your diet. Use psyllium supplements or husk powder to increase daily fiber intake. And enjoy oatmeal as a regular breakfast or snack. Together, they can help optimize your health!