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A Superior Form of Calcium

Designed by Dr. Peter D’Adamo, these products feature a unique natural source of calcium: The small red seaweed called "Maerl" found only in the isolated areas off the pristine coast of Northwest Ireland. Of all sources of calcium, Maerl has one of the lowest levels of undesirable contaminants. Using Maerl calcium as a base, Dr. D’Adamo has crafted four different mineral formulas using unique cofactors and micromineral ratios specific for each blood type. Maerl calcium has one of the lowest levels of lead found in any natural calcium sourceirishcoast.jpg of lead

The pristine shores of the Irish Coast.


All Phytocal® mineral formulas feature Maerl-based sea calcium, the only natural source of calcium with a broad enough buffering range to work effectively amid the differing digestive capabilities of each blood type. Maerl is composed of a wide variety of essential nutrients including calcium, magnesium, boron and zinc. Maerl’s unique structure gives it great versatility, and when woven into formulas tailored to the genetics of ABO blood type, insures a phenomenal rate of bioavailability and utilization. Its superior buffering capacity allows Phytocal Maerl-based calcium to maintain very high rates of absorption despite the variable acid and alkaline levels found in the digestive tracts of the four ABO groups. Phytocal calcium is of highly consistent particle size with excellent dispersion qualities. The solubility of Phytocal calcium can be appreciated visually: There is virtually no sedimentation after dispersion.

Why Blood Type Matters

Research as far back as the early 1960s clearly demonstrated that mineral absorption varies between the different blood types. In large part, this is due to major differences between the blood types with regard to an intestinal enzyme known as 'intestinal alkaline phosphatase' (IAP). This enzyme plays an important role in early life, helping to condition the digestive tract of the developing fetus. In later life, IAP plays an crucial role in absorption of calcium from the diet. Studies have shown that IAP varies by as much as 2.5 fold (250%) between the blood types, from a high level in type O secretors, to a low level in type A non-secretors. Consequently, adjusting a mineral formula to take the blood type differences into account has been a priority for Dr. Peter D'Adamo.

Because each blood type possesses variable assimilation capabilities and requires differing cofactor and trace mineral requirements, Dr. D'Adamo designed four different formulas:

Phytocal A: features higher levels of the important antioxidant selenium; the gastric activating cofactors betaine hydrochloride, renett and gentian root (Gentiana lutea) plus the mineral-rich herb horsetail (Equisetum arvense). Phytocal A also features significant levels of the important calcium absorption enhancer, ipriflavone, and a small dose of vitamin A to enhance the activity of the calcium absorbing enzyme intestinal alkaline phosphatase.

Phytocal AB: features higher levels of the important co-minerals magnesium, manganese and molybdenum; the stomach-acidifying cofactors betaine hydrochloride and renett. Phytocal AB also features yellow dock (Rumex crispus) as a gentle source of iron.

Phytocal B: features the highest levels of magnesium -an important nutrient for nerve and muscle function; chromium to help balance carbohydrate function and proper doses of iron and copper -two important blood-building nutrients. Phytocal B also features higher levels of vitamin D and vitamin K -important calcium absorption cofactors.

Phytocal O: features balanced levels of the micro and macro-minerals magnesium, iron, copper and zinc; manganese to help insure proper joint and ligament function and micro-trace amounts of iodine to enhance thyroid function. Phytocal O also features nettle leaf (Urtica dioica) an important aid to proper intestinal assimilation.

When considering whether to supplement with a multimineral, remember: There are significant differences in calcium absorption and availability. A clean, natural, calcium source with the best bioavailability, designed for your unique absorption capabilities. We think you'll choose Phytocal.


To learn more about our Phytocal multimineral formulas, click on the Phytocal formula for your blood type:

Digestion and The Blood Type Diet

Digestion and The Blood Type Diet

Your blood type affects how your whole digestive tract works. Many foods contain components that react directly to blood group antigens, which can lead to inflammation and the production of toxins.

The entire lining of the gut is covered by a protective film called mucin. It's made up of protein molecules, and these molecules vary by blood type. Bacteria and viruses can stick to this mucus layer- including the “good germs” that help our digestion work more efficiently. Another kind of protein in the mucin layer is a type of antibody called IgA. Both low and high levels of IgA are associated with different kinds of diseases. Lectins in food can affect the amount of IgA in the gut.

The Blood Type Diet is low in harmful lectins. This helps keep IgA levels in a healthy range. The lectin from chicken is especially harmful for Bs and ABs. Type Os should not eat Wheat, Corn, Kidney Beans, Navy Beans, or White Potatoes. Type As should avoid Milk, Lima Beans, White Potatoes, and Oranges. Type Bs should stay away from Corn, Peanuts, Lentils, and Buckwheat. Type ABs should avoid Corn, Buckwheat, Lima Beans, and Kidney Beans.

Saliva contains enzymes and hormones that digest food and kill germs. Carbohydrate digestion starts with chewing, and some sugars are absorbed directly into the blood stream from the mouth.

When food enters the stomach, gastric juice is released. It contains enzymes, hydrochloric acid, and blood type antigens. The acid destroys some germs in food, protecting the gut from infection. Hydrochloric acid can back up into the esophagus, causing reflux and heartburn. When foods digest well, the stomach empties faster, reducing the chance of heartburn. If there's not enough hydrochloric acid, protein digestion will be incomplete, and bacteria can overgrow in the stomach and intestines.

Type Os tend to have higher stomach acid, while Type As have the least. This is why Os do better when they eat more animal protein, and As do better with less. Type As have extra trouble digesting red meat, while doing fine with some poultry and fish.

Then food moves into the small intestine, where digestion continues in an alkaline environment. Hormones are released into the blood stream as this happens. A hormone called CCK tells the pancreas to secrete pancreatic juice and the liver to secrete bile into the small intestine. It also tells the stomach to contract, helping us feel full, and goes to the brain where it helps with appetite control. Several food lectins can influence CCK levels. For blood groups A and AB, soy is especially good at enhancing CCK- improving digestion and making you feel full. Wheat germ decreases CCK, so it should be avoided or minimized.

Pancreatic juice contains enzymes that break down proteins, fats, and carbohydrates. While protein digestion starts in the stomach, it finishes in the small intestine. There are enzymes on the surface of the small intestine that finish breaking down food right before it gets absorbed. There are a lot of blood group antigens here, and that effects how many of each kind of enzyme there are. Blood Type A people have more of the enzymes that break down carbohydrates, digesting them more fully and easily than other blood types. This works well with their low stomach acid, making them thrive on less meat and more beans than other types.

The large intestine, or colon, is where most of the water gets absorbed. The colon works best with fiber to add bulk to the contents. Insoluble fiber acts like a sponge, soaking up liquids, and helps food move through the digestive tract more efficiently. Soluble fiber softens the stool and binds to some toxins, allowing them to safely exit the body. Besides the main categories of soluble and insoluble, the fiber from each individual food will be a little bit different. We can't digest fiber, but some of our gut bacteria can eat it. Since gut flora varies by blood type, the food for these bacteria will vary too. Flatulence and bloating can be a sign that you're taking in the wrong kind of fiber for your body.

When you follow the Blood Type Diet, you'll be getting plenty of both soluble and insoluble fiber from vegetables, fruits, beans, nuts, and whole grains. By choosing the foods that are right for your type, you're also choosing foods that are right for your gut flora, and that you have the right enzymes to digest fully.