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Sulforaphane: Benefits, Side Effects And Food Sources
Boldsky | 20th May, 2019 11:59 AM

A substance called sulforaphane (SFN) that is usually found in cruciferous vegetables, especially broccoli sprouts, is said to be quite beneficial for the health. Its prime notable health benefits are its ability to perform as an anticancer, antimicrobial, anti-inflammatory and a neuroprotective . It has also been found to be effective in protecting against ageing and diabetes .

Sulforaphane is a natural plant compound that is found in cruciferous vegetables - such as cabbage, cauliflower, kale and broccoli. It is activated only when the vegetables are chopped or chewed . Read on to know more about the benefits, side effects and food sources of this highly effective and beneficial compound.

What Is Sulforaphane?

A sulfur-rich compound - Sulforaphane - is said to possess several health benefits. In the vegetables like cabbage, broccoli, etc., this compound is in the inactive form 'glucoraphanin' . This form belongs to the glucosinolate family of plant compounds. It is only when glucoraphanin comes in touch with myrosinase (a family of enzymes that participates in the defence response of plants) that it is activated .

Myrosinase enzymes can be released or activated only when a plant is damaged. This is why cruciferous vegetables must be cut, chewed or chopped to release myrosinase and in turn, activate sulforaphane.

Raw vegetables tend to have the highest amount of sulforaphane. A study result released showed that raw broccoli contained about ten times more sulforaphane than cooked broccoli . It is recommended that one steams the vegetables for about one to three minutes before eating. This is the most ideal technique to optimize sulforaphane levels while cooking. Also, one should remember to cook the vegetables below 140 degree Celsius (exceeding this temperature would lead to loss of glucosinolates) . Therefore, cruciferous vegetables should never be boiled. You can eat them raw or slightly steamed.

When in the body, sulforaphane works by stimulating the production of important enzymes that neutralize free radicals .

Potential Health Benefits Of Sulforaphane

Studies have indicated that sulforaphane can offer the following health benefits:

  • Anticancer effects: Quite a few animal studies have shown sulforaphane to have anticancer properties. It has shown the ability to reduce both the size and number of cancer cells. This compound also shows the ability to prevent cancer cell growth through the release of antioxidant and detoxification enzymes that protect against carcinogens . However, studies are still pending to be conducted to find out if it would be safe to use sulforaphane in a clinical setting to lower cancer risk.

  • Heart health support: Studies have shown that sulforaphane can boost heart health in several ways . This compound benefits heart health by reducing inflammation (as inflammation can lead to narrowing of arteries, and in turn, cause heart disease).

  • Antidiabetic effects: A 12-week study conducted on people with type 2 diabetes examined how consumption of broccoli sprout extract daily could affect blood sugar levels. The results showed that sulforaphane could reduce fasting blood sugar levels to a great extent .

Small-scale studies have shown that sulforaphane can show beneficial results in the following cases as well :

  • Protection against brain damage
  • Treatment of certain symptoms of autism
  • Protection against sun damage
  • Improvement in bowel movement issues such as constipation
  • Promotion of weight loss
Side Effects And Risk Factors Of Sulforaphane

The amounts of sulforaphane present in cruciferous vegetables are considered safe for consumption. However, many people choose to use sulforaphane supplements that can be bought from health stores. The problem is that the over-consumption of these supplements can cause certain side effects .

The sulforaphane supplements are usually made from broccoli or broccoli sprout extract. It is generally in the concentrated form, indicating an amount that is much beyond the content of it found naturally in food sources.

Although there is no particular dosage recommendation, going by what is mentioned on the supplement packs, you might need to take around 400mcg per day (that is 1 to 2 capsules daily).

The usual side effects of these supplements are as follows :

  • Constipation
  • Diarrhoea
  • Increase in gas

Although these supplements are growing in popularity, more research is needed to determine the ideal dose and safety.

Food Sources Of Sulforaphane

Sulforaphane can be obtained naturally from a wide range of cruciferous vegetables. So, to increase the intake of sulforaphane, include the following vegetables in your diet :

  • Cauliflower
  • Broccoli
  • Cabbage - both red and white
  • Broccoli sprouts
  • Kale
  • Brussels sprouts
  • Bok choy
  • Arugula
  • Watercress

Ensure that you cut the vegetables before you eat them. Also, chewing them well will activate sulforaphane from its inactive form (glucoraphanin).

To boost the intake, you can also choose to add mustard seeds or mustard powder to your meals . These being rich in dietary myrosinase, will help in increasing the availability of sulforaphane (especially in cooked vegetables).

On A Final Note...

It is always wise to talk to your healthcare provider before you make any specific dietary or supplement changes. Consumption of sulforaphane may interact with the performance of certain medications, therefore, one should always consult their doctor before consuming this in ample quantities, especially when it comes to the intake of sulforaphane supplements.

 
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