Plant-based Diet Benefits And Risks

Plant-based Diet Benefits & Risks

A Plant-based Diet is becoming a more popular option for many people for three main reasons.

Keep reading to learn more about the Truth About Plant-based Diet.

Many have seen the new documentaries about the better health and stamina this eating style brings, shows like The Game Changers, You Are What You Eat: A Twin Experiment, and Live to 100: Secrets of the Blue Zones.

Learning that the diet may lower the risk for cardiovascular disease and bring significant health benefits, they want to lower their own health risks.

Others have learned how a vegetarian or vegan diet can promote environmental sustainability, and still others want to eat in a way that is more aligned with their values.

 
While the benefits are significant, it’s essential to understand the potential risks in order to navigate this lifestyle effectively.

In this article, we'll explore the transformative health benefits of a plant-based diet, debunk some common myths, and address the real risks—along with actionable solutions—to help you maximize success.

Improved Heart and Metabolic Health

Vegetarian and vegan diets are celebrated for reducing the risk of heart disease and improving metabolic health.

A diet rich in whole grains, legumes, fruits, vegetables, nuts, and seeds helps lower LDL cholesterol levels and supports cardiovascular wellness.

Fiber, a key component of plant-based nutrition not found in meat or dairy products, is one of the key nutrients in the diet that promotes health and longevity.

Additionally, compared with diets that restrict calories, a whole food, Plant-based Diet without calorie restriction is the only diet that has been shown to be successful in maintaining weight loss.

With type 2 diabetes prevention, research found that plant-based diets stand out by stabilizing blood sugar levels and enhancing insulin sensitivity.

For example, a study led by Dr. Neal Barnard and the Physicians Committee showed that a low-fat, plant-based diet improves insulin sensitivity and glycemic control for those with diabetes.

 
The Adventist Health Study 2 (AHS-2) demonstrated that vegetarian and vegan participants had a significantly lower prevalence of type 2 diabetes compared to non-vegetarians.

Similarly, the EPIC-Oxford Study found lower rates among participants following plant-based dietary patterns.

Weight Management and Longevity

A healthy diet made up of different types of plant-based whole foods is an effective tool for weight management and long-term health.

Thanks to the low-calorie density and high fiber content of plant foods, it’s easier to feel full without overeating.

Success stories of individuals losing weight and keeping it off on a vegan or vegetarian diet highlight the long-term sustainability of this approach.

Studies, such as the Adventist Health Study-2, show that plant-based diets are associated with longevity and reduced risks of chronic diseases.

Choosing nutrient-dense foods supports healthy aging and vitality.

Environmental and Ethical Benefits

While this diet is great for your health, it's also the best for the planet.

Compared to diets rich in animal products, plant-based foods reduce greenhouse gas emissions, conserve water, and minimize land use.

From an ethical standpoint, to eat a vegan diet aligns with animal welfare values and environmental stewardship.

Protein Deficiency? Not a Concern!

One of the most persistent myths about any type of vegetarian diet is the idea of protein deficiency compared with meat eaters.

The reality?

Vegan men and women easily meet protein needs.

Foods like lentils, tofu, tempeh, chickpeas, and quinoa are great protein sources.

In addition, all plants contain all three macronutrients: protein, carbohydrates, and fat.

They are just in varying percentages, and you'll get enough protein if you eat enough calories with a nice diversity of plants.

In addition, that diversity of plants with all the different types of fiber is fantastic for your microbiome!

Studies show that vegans and vegetarians often consume double the Recommended Dietary Allowance (RDA) for protein, similar to those eating diets with meat products.

In contrast, the real nutrient of concern for those not eating plant-based is fiber, which is an essential component often lacking in the standard diet.

Calcium: Beyond Cow's Milk

Milk is often promoted as a go-to source of calcium, but it’s far from the only option—and arguably not the best.

Around 70% of the global population is lactose intolerant, making cow’s milk unsuitable for most people.

As Dr. Walter Willett, who's probably the most recognized nutritional epidemiologist in the world, highlighted in a 2020 Harvard review, countries with the highest milk and calcium intakes often have the highest rates of hip fractures.

This paradox on health outcomes suggests that dairy may not be the gold standard for bone health it’s claimed to be.

Cow’s milk is designed to support the rapid growth of calves, just as moose milk or dog milk is designed to nourish their respective offspring.

Humans have no more need for cow’s milk than they do for moose milk, even though moose milk contains nearly twice as much calcium as cow’s milk.

Despite this, no one considers moose milk an essential food for human health, underscoring how misguided it is to treat cow’s milk as indispensable.

What truly matters for strong bones isn’t just calcium intake—it’s what our bodies absorb.

For instance, a cup of cow’s milk provides 300 milligrams of calcium, with about 32% (96 milligrams) being absorbed.

Surprisingly, this is on par with a cup of cooked kale, which provides 177 milligrams of calcium, of which 53% (94 milligrams) is absorbed.

Leafy greens like kale, bok choy, and broccoli boast higher calcium bioavailability than cow’s milk, making them excellent options for meeting calcium needs.

In contrast, spinach, though calcium-rich, has low absorption due to its high oxalate content.

Other plant-based sources like tofu, fortified plant milks, tahini, almonds, and chia seeds are good sources of calcium.

For example, fortified soy milk has a similar absorption rate (31%) to cow’s milk, while beans and lentils provide about 20-23%.

The key to optimal calcium intake?

Having just a bit of knowledge about the actual best sources of calcium, and focusing on eating a wide variety of plant-based foods.

Other supporting nutrients are vital for maintaining strong bones, including vitamin D, vitamin K, magnesium, and zinc.

These nutrients all work together to support bone density, strength, and overall bone health.

One daily supplement that I trust to ensure I'm getting optimal amounts of only nutrients I might slightly be short on (and not vitamins that can be harmful), are Dr. Fuhrman's Women's Daily +D3 or Men's Daily +D3.

By including small amounts of calcium-rich foods throughout the day, you enhance absorption and support bone health, and put yourself in the category of having a lower risk of fractures —without relying on dairy.

Iron: Balancing Absorption and Health

Concerns about iron and Omega-3 intake are also easily addressed with proper planning.

Iron, found in legumes and whole, minimally processed grains, is best absorbed when paired with vitamin C-rich foods like oranges and other citrus fruits or bell peppers.

The non-heme form of iron found in plants is less bioavailable than some of the iron that you get when you eat meat that's in the heme form.

Vegans do tend to have lower iron stores, which are measured by serum ferritin levels.

Some people consider this a disadvantage.

It may actually be an advantage, though, because high serum ferritin levels are associated with an increased risk of several diseases, including heart disease, some cancers, and diabetes.

With iron, too much is just as unhealthy as too little, so it's a fine balance.

If you need to supplement, an iron supplement that I like is Dr Fuhrman's Gentle Iron because it is a vegan formulation of iron bisglycinate, which is more highly absorbed than other forms of iron and causes less gastrointestinal discomfort. 

Omega-3: Essential for Everyone

Omega-3 fatty acids are crucial for overall health, particularly for brain function and the central nervous system.

Interestingly, many people, and not just those eating a plant-based diet, could benefit from increasing their omega-3 intake.

These essential fats are often overlooked in the standard diet, leading to potential gaps in optimal health.

Plant-based omega-3s come predominantly in the form of alpha-linolenic acid (ALA), which is found in flaxseeds, chia seeds, hemp seeds, and walnuts. 

These foods are excellent sources of ALA, providing a foundation for omega-3 intake.

However, the longer-chain omega-3s—eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)—are more biologically active and play critical roles in central nervous system function, cardiovascular health, and inflammation regulation.

Humans can convert ALA into EPA and DHA, but the process is slow and inefficient for most people.

This limited conversion capacity means that relying solely on plant sources of ALA may not provide sufficient amounts of EPA and DHA for optimal health.

So how to get enough DHA & EPA?

See the next section for details.

The Real Deficiency: Fiber

While myths about protein and calcium deficiency persist, fiber deficiency is a genuine issue for those not eating plant-based.

Fiber is crucial for gut health, heart health, and preventing chronic diseases.

Most people consuming the Standard Industrial Diet fall short of the recommended daily intake and consume only about 16 grams daily which is far below the recommended 25 to 38 grams.

Fiber is found exclusively in plants, with legumes offering the most concentrated source.

A single cup of cooked beans or lentils adds 10 to 15 grams of fiber. Barley and spelt provide around 8 grams per cup, while brown rice has about 3.5 grams.

Processed grains lose much of their fiber content, further widening the gap.

Vegans, who focus on whole plant foods, often consume 40 to 60 grams of fiber daily.

Historically, humans thrived on over 100 grams of fiber per day from wild plants and grains.

Closing the fiber gap offers substantial health benefits, including improved digestion, lower blood sugar, reduced cholesterol, and protection against conditions like hypertension, stroke, and colorectal cancer.

Plant-based eaters easily surpass daily recommendations without concern by prioritizing fiber-rich foods like legumes, whole grains, fruits, and vegetables.

Junk-Food Veganism

A major risk of any diet lies in poor food choices, and this one is no different.

The rise of processed vegan foods can create a “junk-food vegan” lifestyle, where highly processed snacks and calorie-dense items replace nutrient-rich whole foods.

This approach lacks the health benefits associated with a balanced whole plant food diet.

To avoid this pitfall, focus on whole, minimally processed plant-based foods as discussed in this article.

If you need some direction on on how to do this, download my FREE Plant-based power bowls blueprint.

Nutrient Gaps from Poor Planning

Some individuals may adopt extreme versions of plant-based diets, such as raw vegan or fruit-only regimens, which can lack variety and become too narrow.

These restrictive approaches can result in calorie deficits and deficiencies in vital nutrients like protein, iron, and omega-3 fatty acids.

A well-planned plant-based diet includes diversity of plants to meet your nutritional needs.

Incorporating fortified foods and some targeted supplements can ensure a healthy balance.

Essential Supplements

Vitamin B12 is a critical nutrient not in plant foods.

Historically, B12 was obtained through bacteria in soil and water, but modern sanitation practices have eliminated this source.

Supplementing B12 is essential for anyone following a plant-based diet—and is recommended for everyone over age 60, regardless of diet, due to decreased absorption with age.

So even if you don't eat primarily plant-based and are over 60, it's recommended to supplement B12.

My favorite supplement for B12 is this one for women and this one for men.

Vitamin D, often derived from sunlight, may also require supplementation during winter months or for individuals with limited sun exposure.

Vitamin D is included with the B12 supplements mentioned above.

How to Maximize the Benefits and Avoid the Risks

Whole-Food Focus

To ensure success, prioritize whole, plant-based foods, include a variety of vegetables, fruits, legumes, whole grains, nuts, and seeds in your meals.

Batch cooking and meal prep can simplify your routine and keep you on track with healthy eating.

Education and Support

Leverage trusted resources from researchers and doctors like Dr. Neal Barnard, Dr Joel Fuhrman, and Dr. Michael Greger.

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