Monday, June 16, 2025

Are Multi-Vitamins Really a Waste of Money?


Multivitamins that provide essential vitamins and minerals at doses that provide greater than 100% of the RDA are the most commonly used dietary supplements.

Major press outlets have been pushing a highly negative narrative about Multivitamins such as:

 

  • “Multivitamins are a waste of money for most people”

  • “Multivitamins continue to disappoint”

  • “Multivitamins and Supplements—Benign Prevention or Potentially Harmful Distraction?”

A key theme the press pushes is that people who take multiple vitamins use them to attempt to compensate for unhealthy lifestyle practices like smoking, drinking excessive alcohol, taking drugs, etc.   Is this true?

The answer is NO!.  The overwhelming majority people take multivitamins as an addition to a healthy lifestyle. A study looking at the health habits of nutrition supplement users concluded that:

 “Dietary supplements are used by half to two-thirds of American adults, and the evidence suggests that this usage is one component of a larger effort to develop a healthier lifestyle. Dietary supplement users tend on average to be better educated and to have somewhat higher incomes than nonusers, and these factors may contribute to their health-consciousness. Dietary supplement use also tends to be more prevalent among women than among men, and the prevalence of use increases with age in both men and women. Numerous surveys document that users of dietary supplements are significantly more likely than nonusers to have somewhat better dietary patterns, exercise regularly, maintain a healthy weight, and avoid tobacco products. While supplement users tend to have better diets than nonusers, the differences are relatively small, their diets have some substantial nutrient shortfalls, and their supplement use has been shown to improve the adequacy of nutrient intakes. Overall, the evidence suggests that users of dietary supplements are seeking wellness and are consciously adopting a variety of lifestyle habits that they consider to contribute to healthy living.”

The press also frequently publishes articles stating that nutrition supplements either do not work or that they are dangerous. Is this true?

In almost every case when you look at these studies you find a number of factors which negate their validity and usefulness including:

Many are sponsored by drug companies who design the study to deliberately prove a supplement does not work.   For example, the Cosmos Trial sponsored by Pfizer used Centrum Multivitamin to examine how this multivitamin affected cancer risk.  The problem is that Centrum is uses inferior forms of many nutrient forms while also using far from optimal doses.   All that can be concluded from this “research” is that Centrum did not affect cancer outcomes.

As to Nutrition supplements being dangerous – that is a VERY misleading statement.   Let’s look at the facts – not the hype!   

To put the danger of nutrition supplements into perspective consider that drug overdoses currently kill over 85,000 Americans each year.   Non-Steroidal Anti-Inflammatory Medications like aspirin and ibuprofen alone routinely kill over 7,000 people every year.  Opioids alone account for 50,000 deaths and are the leading cause of death for Americans under 50 years of age!

Now what about deaths from nutritional supplements? 

According to the American Association of Poison Control Centers, which has been tracking supplement and drug issues for over three decades, there have been 13 alleged deaths from vitamins in 31 years!  Let that sink in 13 in 31 years is less than 1 death per year compared to over 85,000 deaths from pharmaceuticals every year.  

Monday, June 9, 2025

Ideal Rest Time Between Sets

 

There are several different variables to consider when resistance training including:

The exercises you chose to do

The amount of resistance/weight used

The number of repetitions for each set of exercise

The total number of sets of exercise

The rest time between sets of exercise

There is an inverse relationship between the weight lifted and the number of repetitions completed in a set.   When you choose heavier weights you will be able to complete fewer repetitions before fatiguing the target muscles.      A general rule is that higher levels of resistance with less repetitions focus more on building strength, and lower levels of resistance for more repetitions focus more on increasing muscular endurance.

So how does rest time between sets of exercise affect the workout and the results you will obtain from a workout and how should you determine your rest time between sets?    The answer depends on your goals for the workout.        

If your goal is to maximize strength (meaning the maximum amount of resistance you can complete one repetition with) then you should choose longer rest periods of 3 – 4 minutes to allow for complete recovery of the muscles between sets and use high levels of resistance for 3 – 5 repetitions.   

If your goal is muscular hypertrophy meaning increasing muscle size then reducing rest periods to 1 – 2 minutes with less resistance and a higher number of repetitions – 8 – 15 would help to maximize progress.  

If your goal is maximizing calorie burn during the workout and caloric afterburn after the workout, then using minimal rest periods down to no rest period between sets of resistance training is optimal to drive the metabolic overload during and after the workout.

If all this seems too complicated the great news is that a recent study done with experienced weightlifters showed that there was no difference in results when one group used a timed recovery of 2 minutes and another group used a self-selected recovery period based on each individual’s perception of fatigue.     

In the group that chose their own recovery period the average recovery time chosen was less than 2 minutes.    The researchers concluded that the volume of exercise performed (total number of sets and reps) is probably a more important factor in driving results versus an exact rest time.

For most of us in the gym who are focused on building a lean physique but not concerned with absolute strength or size the following recommendations are a good guideline:

Do 1 – 3 sets of exercise for each major body part such as chest, shoulders, arms, legs, etc.

Choose a level of resistance where you can complete 8 – 12 repetitions of each set of exercise in good form hitting momentary muscular failure by the end of the set.

Use slow controlled movement without momentum to keep tension in the target muscles throughout the set.

Use compound movements for most exercises – meaning movements that involve movement at two or more joints such as a chest press or push-up versus a pec fly movement.

Use the shortest rest period possible that allows you to complete 8 – 12 repetitions – probably between 30 seconds – 2 minutes!

Monday, June 2, 2025