How to boost your metabolism

Protein: The most well-established lever

If one factor reliably increases energy expenditure, it is protein. A 2024 meta-analysis showed that higher-protein meals measurably increase both diet-induced thermogenesis and total daily energy expenditure in the short term. Over longer periods, total energy expenditure also remained elevated in higher-protein diets.

Important for context: The effect is real and consistent, but moderate. Protein is not an accelerant, but a solid, practical lever. A second advantage often weighs more heavily for women: Sufficient protein helps protect muscle mass during a diet, rather than losing it along with fat.

Strength training: Not for the calories burned, but for the muscles

Here, scientific honesty is worthwhile. Several systematic reviews show that exercise, especially a combination of endurance and strength, does not reliably raise the basal metabolic rate significantly. The often-promised afterburn effect is considerably smaller than advertising suggests.

The actual value of strength training lies elsewhere, and it is well-documented: It builds and maintains muscle mass, lowers body fat percentage, and improves body composition. A meta-analysis of postmenopausal women found that strength training primarily benefits muscle mass, while endurance training has a stronger effect on fat mass. This is crucial for midlife, as muscle mass slowly begins to decline without counteraction from around the age of 30.

Myths you can safely discard

Many popular tips do not stand up to evidence. There is little reliable evidence that many small meals boost metabolism more than three balanced ones. Also, the difference between a "fast" and "slow" metabolism is usually small in people with similar body data. And the idea that metabolism can "fall asleep" and needs to be woken up with home remedies is physiologically untenable.

What really happens with strict diets: The body adapts, the urge to move decreases, and with every lost pound, energy requirements also decrease. This is not a punishment from your metabolism, but an expected adaptation that you can cushion with protein, strength training, and patience.

The Female Factor: When Hormones Co-Determine Basal Metabolic Rate

For many women, age is not the decisive factor, but rather their hormonal situation. Three areas are particularly relevant here.

Thyroid Gland

The thyroid gland is one of the most important regulators for basal metabolic rate. An underactive thyroid (hypothyroidism) demonstrably lowers energy consumption and can contribute to weight gain. Even fluctuations in thyroid values within the normal range are associated with differences in basal metabolic rate and body composition in observational studies. The data on these subtle fluctuations is not yet conclusive, which is why a look at TSH, fT3, and fT4 can be useful if weight and energy change without a clear reason.

PCOS and Insulin Resistance

A systematic review with meta-analysis reports that women with polycystic ovary syndrome show a lower resting energy expenditure in individual studies, with accompanying insulin resistance potentially lowering it further. These findings primarily come from observational data and are not consistent across all studies. However, they show why general weight loss tips for PCOS often fail and why a hormone-sensitive approach is important.

Menopause

Interestingly, the Pontzer data found no direct menopause effect on the pure metabolic rate. What does change during perimenopause, however, is body composition: declining estrogen levels favor the loss of muscle mass and an increase in abdominal fat. This is precisely why strength training acts as a shield during this phase, not because it boosts metabolism, but because it defends the muscle mass that supports your basal metabolic rate.

What you can do specifically

From the evidence, a few honest, everyday priorities can be derived:

• Protein in every meal: the best-proven lever for energy consumption and muscle protection.
• Strength training two to three times a week: maintains muscle mass and body composition, especially from mid-life onwards.
• Stay active in everyday life: unconscious activity (walking, standing, stairs) often makes more difference than a single workout.
• Take sleep and stress seriously: both influence appetite and eating behavior, and thus indirectly your weight.
• Check hormones for persistent problems: thyroid, insulin, and cycle phase can explain the difference.

No single food, tea, or supplement boosts metabolism like a switch. What works is the combination of sufficient protein, muscle maintenance, and an honest look at your own hormonal situation.

Conclusion

Boosting your metabolism works differently than most guidebooks promise. Your energy expenditure is remarkably stable between 20 and 60, and no home remedy can kick-start a dormant engine. What really works is well-documented and unspectacular: sufficient protein, strength training to maintain muscle mass, and everyday physical activity.

For women, there's an additional dimension that many tips overlook: thyroid, insulin levels, and cycle phase all influence how your body uses energy. If weight and energy change without an apparent reason, a hormone-sensitive perspective is worthwhile instead of torturing yourself with the next metabolism trick.