American consumers spend a staggering $60 billion annually on nutritional supplements, with a vast array of products ranging from multivitamins and digestive aids to those claiming to build muscle and slow aging. This equates to an average of $175 per person—a considerable expense. But do all these supplements deliver the expected results? That's a question we need to consider.
Nutritional supplements can offer numerous benefits, especially for the elderly and those suffering from malnutrition. But which supplements are effective, and who are they suitable for?
First, a few points generally apply. Dietary supplements are not approved by the U.S. Food and Drug Administration (FDA), meaning their efficacy may be exaggerated, unlike FDA-approved medications. It is recommended to choose supplements tested by third-party agencies such as the NSF and USP, which can ensure their dosage and purity (their logo will be on the supplement label). However, in addition to supplements, a balanced diet, including a variety of fruits, vegetables, legumes, nuts, seeds, whole grains, and lean protein, can reduce or even eliminate excessive reliance on supplements.
Next, I will analyze the advantages and effects of different types of dietary supplements.
Ashwagandha
This mainstay of Ayurvedic medicine, derived from tropical and subtropical evergreen plants, has caught the wave of social media buzz, with studies suggesting it can reduce stress and potentially improve sleep quality. Its positive effects on other abilities are currently inconclusive.
It is worth noting that ashwagandha is generally safe to use, but it is not recommended if you have an autoimmune disease, because one of the effects of ashwagandha is to boost the immune system, which will strengthen the part of the immune system that is attacking your body.
Calcium
For many people, getting enough calcium can be a challenge. Recommended intake varies from person to person: approximately 1000 mg per day for children aged 4 to 8 and adults aged 19 to 50, 1300 mg for teenagers, and 1200 mg for women over 50 and people over 70.
To meet your daily calcium intake requirements, you need to consume a significant amount of dairy products and other calcium-rich foods: a cup of milk (or fortified almond milk or rice milk) contains 300 to 450 mg of calcium, a cup of nonfat yogurt contains nearly 500 mg, 1.5 ounces of cheese contains 115 to 485 mg of calcium, and a cup of cooked spinach contains 245 mg of calcium. Fortified tofu, sardines, and some leafy green vegetables can also provide calcium, but in fact, taking calcium supplements may be a good idea—especially for postmenopausal women.
Women are at higher risk of osteoporosis after menopause, so ensuring adequate calcium intake is crucial. Diet alone is often insufficient to meet these needs, making appropriate calcium supplementation essential.
Collagen
Collagen supplements are becoming increasingly popular as we age because our bodies produce less collagen, leading to wrinkles that are an unsightly sign of aging. But collagen's role in the body goes far beyond that.
There are currently 28 known types of collagen, with the first five being the most common: Type I collagen is found in skin, bones, and ligaments; Type II collagen is found in cartilage; Type III collagen is found in muscles, arteries, and organs; Type IV collagen is found in the basement membrane that supports cells inside and outside the body; and Type V collagen is found on cell surfaces, hair, and the placenta. Therefore, if you are supplementing with collagen, the type of collagen is very important. For example, some studies have shown that Type I collagen can improve wrinkles and skin elasticity in women; other studies have found that Type II collagen helps alleviate symptoms of osteoarthritis.
However, for collagen, vitamin C (which is itself a supplement) is essential for building many collagen structures in the body, and vitamin C is added to most collagen supplements used for research.
So when they say collagen supplements are good for the skin, is it actually vitamin C that's doing the work? It's hard to tell. If your goal in supplementing with collagen is for healthy skin, then the best approach is to eat plenty of foods rich in vitamin C.
Fish Oil
If you eat fish less than two or three times a week, fish oil supplements are an excellent source of DHA (an omega-3 fatty acid). For vegetarians, DHA supplements made from algae are also available.
Fish oil can lower triglycerides (a type of blood fat associated with heart disease) and may help prevent dementia or Alzheimer's disease. Fish oil supplementation can lower the genetic predisposition to LDL cholesterol and triglycerides while increasing HDL cholesterol levels. However, current research has not found conclusive evidence that fish oil lowers high cholesterol, and it may even raise LDL cholesterol; therefore, people taking fish oil should monitor their LDL cholesterol levels.
Green Powder
Green powder, also known as vegetable powder, is another social media phenomenon that claims to concentrate the benefits of large amounts of vegetables into a few pills.
However, whether vegetable powders are effective depends on the type of vegetable used. Each vegetable has slightly different nutritional components and effects on the body. Carefully check the ingredient list to ensure there are no unusual ingredients. If you are unsure about a particular ingredient, consult a nutritionist.
That concludes today's analysis. In the next blog post, I will analyze iron, magnesium, vitamins, prebiotics, probiotics, protein powder, and psyllium husk.
