6. Tofu
Tofu is made by coagulating soy milk that is pressed in solid white blocks. It contains 24.4 nanograms/gram PQQ. Tofu is known to reduce the risk of heart disease and is also linked to reduced risk of cancer. These are due to the isoflavones found in it that also has a lot of health benefits like PQQ.
7. Spinach
Spinach contains 21.9 nanograms/gram PQQ. It is also an excellent source of vitamins such as vitamin A, B2, B6, E and K. It is also rich in minerals including iron, magnesium, potassium, calcium, copper and manganese. It is easy to incorporate spinach in your daily diet. It can be added to vegetable drinks and smoothies, sautéed as a side dish and added to stir fried vegetables or soups.
