Do DNA Diets Work?

It is likely you have already encountered an advertisement for DNA-based diets on the internet. These may go by “nutrigenomics” or “precision nutrition” eating plans. These eating plans base their advice on a person’s own DNA to determine what foods are best for them. The diets are already available, but do they really work? Or is it just hype?

The Science

Nutrigenomics is an evolving field that studies the relationship between diet and a person’s genome- the collection of all their DNA. By analyzing the genome, scientists can determine which foods are best for them based on genetic predispositions and metabolism of substances (like fats and sugars).

Components of food, like metabolites and vitamins, act as molecular mediators for gene expression. In this manner, food ingested has an impact on our health at a molecular level- if nutrients optimized then so will health.

How It Works

These personalized nutrition plans are available by companies through the internet. A person usually sends in a DNA sample (swab or tube) through the mail along with information about their health and goals.

The consumers then receive an information packet on their findings, genetics, and metabolism- like caffeine sensitivity. They also receive a list of foods that are considered good for their body and those they should stay away from.  

The information provided to the consumer gives them a deeper understanding of how their body works and may shed some light on previously unexplained symptoms. For example, some might feel like their body resents certain foods and then find out that their body is indeed sensitive to it.

Does it Work?

The principle by which these diets work seems to hold and research in favor is growing. However, not everyone who has tried it is satisfied with the results. Effectiveness may vary based on specific goals like weight-loss versus athletic performance. Other reasons for variation in effectiveness may include lifestyle and age.

Skeptics of the diet argue that despite the science holding it is still too early to prescribe such diet plans to be used routinely. However, learning more about one’s body and confirming suspicions about how our body responds to certain foods may prove beneficial.

Other skeptics argue that the genetic contribution to one’s metabolism and athletic performance is too small to make it a big deal. Behavior and lifestyle seem to have a much bigger impact on our weight and overall well-being.

Should I Try it?

If you’ve got the money, why not. DNA-based diets do seem to help a lot of people get to know their bodies better and genetic predisposition to disease. Just know what to expect and know that level of satisfaction with the result does vary.

If general well-being is the goal then remember to drink water, eat veggies, and stay active. There are always ways to get to know your body without the use of genetic testing. Write down what you eat and how you feel after (keep it old school). If you require more help, consult a dietitian or nutritionist for help.