The diet claims that eating proteins called lectins that don't match your blood type can lead to potential health conditions. However, there is minimal research to back up this claim.

The blood type blueprint explained D’Adamo’s theory rests on the idea that each blood type evolved during different periods of human history, creating unique digestive adaptations. Type O ...

More recently, TikTokers have been talking about the blood type diet and its purported benefits and downsides. But is there any scientific evidence that the diet works? Here’s what experts say.

For type O: The original blood type requires a high-protein diet, according to the theory. Red meat, fish, and vegetables are encouraged, while grains and dairy should be limited.

Blood type basics Blood type is categorized into one of these eight groups: A-positive, A-negative, B-positive, B-negative, O-positive, O-negative, AB-positive and AB-negative.

Every person has a specific blood type. Learn what determines your blood type and why it’s important to know what it is.

Can eating according to your blood type really help with digestion, weight, or longevity? Experts explain the science and also reveal other factors linked to blood type.