1227: The 5 Most Important Supplements to Take

Low omega-3 fatty acid intake has been connected to heart issues, heart disease, certain cancers, inflammatory issues, low cognitive function, and impaired brain development among children.

Caffeine pairs exceptionally well with theanine. If you take caffeine or you drink lots of coffee, try taking 200 milligrams of theanine for every 100 milligrams of caffeine.

Mushrooms contain a form of vitamin D called D2, which doesn't raise levels in the blood nearly as effectively as D3. So, if you're a vegan, and your vitamin D levels are low, get lots of sunlight. If that's not working, I suggest supplementing with a vitamin D3 supplement.

Protein intake has been shown in studies, quite conclusively, at high levels—and high is about 0.6-1.0 grams per pound of body weight—to build more muscle, add more strength, and regulate appetite.

When I work with clients, and they don't have good sleep, I would say, seven out of eight times, when I reduce their caffeine intake, their sleep issues go away.

It's believed one of the reasons why there's a flu season is because of low vitamin D levels. If you look at the peak levels of infection, you'll notice that happens in February—a good three months after we've started seeing less sunlight.

Of course, the best way to raise vitamin D? Sunlight. There's nothing that'll raise vitamin D more effectively than sunlight.

Supplementing with creatine has been shown, across the board, in thousands of studies, to have tremendous muscle-building benefits—the side effect of which is fat loss. Lots of studies also show multiple health benefits from supplementing with creatine.

It's much harder to overdose on nutrients, vitamins, and minerals from food than it is from supplements.

Vegans are at a higher risk of nutrient deficiencies—in particular iron and vitamin B12.

The more strict a diet is, the more limiting it is nutrient wise.