When it comes to health and longevity, Japan often comes to mind as a leader in life expectancy. Recent statistics show that the average life expectancy in Japan is 80 for men and 86 for women. So, what’s their secret to a long and healthy life? One of the key contributors is seaweed, a nutrient-rich vegetable dubbed the “longevity super food.”
Why Calcium Is Important
Calcium is essential not only for bone health but also plays a crucial role in maintaining cardiovascular, nerve, and muscle health. For the elderly, osteoporosis and bone-related issues are common due to reduced calcium absorption. Therefore, it is vital to supplement calcium through natural food sources.
In Japan, seaweed, especially Wakame, has become an integral part of their daily diet. Besides being delicious, this vegetable boasts an impressive calcium content, approximately seven times higher than regular milk. This makes it an ideal choice for those looking to support their bone health.
Seaweed – A Calcium-Rich Superfood
According to research, 100g of Wakame seaweed can provide up to 264mg of calcium, meeting 15% of the body’s daily calcium needs. Interestingly, the calcium in seaweed is more easily absorbed than that in milk due to its harmonious combination with other nutrients like magnesium and vitamin D.
In addition to calcium, seaweed is packed with other valuable nutrients:
- Iron: Supports red blood cell production and prevents anemia.
- Iodine: Enhances thyroid function and improves metabolism.
- Omega-3: Promotes heart health and reduces the risk of heart disease.
- Fiber: Improves digestion and effectively controls weight.
- Polyphenols: Offer anti-inflammatory and antioxidant benefits, and may help prevent cancer.
Vietnamese nutrition experts also emphasize the importance of including seaweed in our daily meals. Dr. Nguyen Thi Lam, former Vice Director of the National Institute of Nutrition, shared with VietnamNet newspaper: “Seaweed is a nutrient-rich food, especially suitable for the elderly. The abundant calcium and iodine content contributes to better bone health and thyroid function.”

The Longevity Secret of Seaweed
It’s no coincidence that seaweed is considered a “longevity secret” in Japan. Michiko Tomioka, a renowned Japanese nutritionist working in the US, shares: “Seaweed is not just a cooking ingredient but also a symbol of a healthy lifestyle. The Japanese often use seaweed in dishes such as miso soup, sushi rolls, or salads.” (Quoted from CNBC)
Besides incorporating seaweed into their diet, the Japanese also prioritize a balanced lifestyle, including:
- Diverse Diet: Combining seaweed with salmon, soy, green tea, and other nutrient-rich foods.
- Regular Physical Activity: Practicing yoga, walking, or engaging in outdoor activities.
- Positive Mental Attitude: Emphasizing mindfulness and gratitude.

How to Prepare and Use Seaweed
Seaweed can be prepared in a variety of delicious and nutritious dishes. Here are some suggestions:
- Miso Soup with Wakame Seaweed: A traditional Japanese dish that is both tasty and easy to make.
- Seaweed Salad: Combine seaweed with carrots, cucumbers, and sesame oil for a refreshing flavor.
- Sushi Rolls: Add dried seaweed to rice for a nutritious and visually appealing sushi roll.
Notes on Usage
- Soak dried seaweed in cold water before cooking to soften it.
- Avoid consuming excessive seaweed in a day to prevent iodine intake.
- Pregnant women and those allergic to seafood should use seaweed with caution.
Seaweed is not just a calcium-rich food but also offers comprehensive health benefits. This is the key to why the Japanese maintain their high life expectancy and remain healthy even in their 80s. Incorporate seaweed into your daily diet to unlock its wonderful nutritional value.
Remember, health depends not only on a single food but also on a combination of a balanced diet, a healthy lifestyle, and a positive mindset. Starting today, show yourself some love by taking care of your health the right way!
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