Does Colostrum Cause Weight Gain in Adults? The Truth About Supplements

November 5, 2025 •

4 min read

While colostrum is essential for newborn development, its effects on adult weight have been the subject of recent discussion. Research indicates that, when used properly, bovine colostrum supplements do not cause weight gain in adults but may instead aid in building lean muscle mass. However, excessive intake or a sedentary lifestyle combined with supplementation could contribute to weight gain.

Quick Summary

This article examines the evidence regarding adult colostrum supplementation and its impact on body weight. It covers potential effects on body composition, the role of lifestyle factors, and provides dietary and lifestyle considerations for individuals concerned about weight changes.

Key Points

Not a Direct Cause of Weight Gain: For healthy adults, colostrum supplementation is not directly linked to weight gain; in moderation, it is not a significant source of excess calories.
Potential for Lean Muscle Gain: Some studies, particularly those involving athletes and resistance training, have shown colostrum can promote an increase in lean body mass.
Influenced by Lifestyle: Any potential weight gain is more likely tied to a high overall caloric intake and a sedentary lifestyle, rather than the colostrum itself.
Gut Health Connection: By improving gut health and intestinal barrier function, colostrum can have a positive, indirect effect on metabolism and weight management.
Consider Dosage and Quality: For optimal results and to avoid unintended caloric increase, it is important to stick to recommended dosages and choose high-quality supplements.

Understanding Colostrum and Its Nutritional Profile

Colostrum is the first milky fluid produced by mammals after giving birth, and it is packed with bioactive compounds, including immunoglobulins (antibodies), growth factors (like IGF-1), lactoferrin, and a range of vitamins and minerals. Most supplements for adult consumption are sourced from cows, known as bovine colostrum. Bovine colostrum is known for its high protein and nutrient density.

The Relationship Between Colostrum, Muscle Mass, and Fat Loss

Several studies have investigated the link between bovine colostrum and changes in body composition, with mixed but generally promising results, particularly for active individuals. Some research indicates that when combined with resistance training, colostrum supplementation can lead to an increase in bone-free lean body mass and a decrease in body fat. This is potentially due to the growth factors found in colostrum, such as IGF-1, which supports muscle repair and growth. However, other studies have shown no significant difference in body composition between colostrum and placebo groups. These varying results may be influenced by factors such as the placebo used (some studies use whey protein, which also has benefits), the dosage, and the intensity of exercise.

Role in Gut Health and Metabolism

Colostrum's impact on gut health may also indirectly affect weight management. It has been shown to help repair the intestinal lining and reduce intestinal permeability, often referred to as "leaky gut". A healthier gut microbiome is linked to improved metabolism and may play a role in weight regulation. Lactoferrin, an immune component found in colostrum, also has anti-inflammatory properties that can help reduce systemic inflammation, which is sometimes associated with metabolic issues.

Can an Adult Taking Colostrum Actually Gain Weight?

While colostrum is not inherently a high-calorie supplement, consuming excessive amounts could contribute to weight gain, especially in the absence of a healthy diet and regular physical activity. A high-quality colostrum powder generally contains a modest number of calories per serving (e.g., 15-20 calories per scoop), but this should be factored into one's total daily intake. Some individuals with a sedentary lifestyle may experience weight gain if they increase their caloric intake from any source, including supplements, without adjusting other aspects of their diet and exercise routine. For individuals with specific growth challenges, such as children with failure to thrive, colostrum has been shown to aid weight gain, which is a desired outcome in those cases.

Colostrum vs. Whey Protein: A Comparison

To understand the nuances of colostrum's effect on body composition, it's helpful to compare it to a more common supplement like whey protein, which is often used as a placebo in colostrum studies.


Feature	Colostrum	Whey Protein
Primary Benefit	Immune support, gut health, tissue repair, lean muscle growth	Muscle building, post-workout recovery
Key Components	Immunoglobulins (IgA, IgG, IgM), lactoferrin, growth factors (IGF-1), rich in vitamins and minerals	High concentration of branched-chain amino acids (BCAAs)
Effect on Body Composition	Potential for lean muscle gain and fat loss, especially with exercise	Primarily focuses on muscle hypertrophy
Cost	Often more expensive due to complex processing and sourcing	Generally less expensive and widely available
Digestive Impact	Supports gut health and intestinal barrier function	Some individuals may experience digestive discomfort

Lifestyle Factors and Caloric Intake

It is crucial to remember that supplements are just one part of a larger health picture. The ultimate effect on weight is determined by the balance of calories consumed versus calories expended. Here are a few important considerations:

Dietary Habits: A calorie-controlled, nutrient-dense diet is fundamental for maintaining a healthy weight. Colostrum is not a magic pill and cannot offset a poor diet.
Exercise Regime: Regular physical activity, including both resistance and aerobic exercise, is a key component for managing weight. As research shows, colostrum's benefits for lean muscle mass are more pronounced when combined with a training program.
Dosage: Adhering to the recommended dosage is important. Studies have used a range of dosages, often between 10-60 grams daily. Taking more than recommended is unnecessary and adds extra calories without proven benefits.
Individual Metabolism: Everyone's body responds differently to supplements and dietary changes. A healthcare provider can offer personalized advice based on your metabolic rate and health goals.

Conclusion

For most healthy adults, colostrum supplementation does not cause unwanted weight gain. In fact, when paired with a fitness regimen, some evidence suggests it can help increase lean body mass and reduce body fat, indirectly supporting weight management goals. The primary drivers of weight change remain overall caloric intake and expenditure, and colostrum is not a high-calorie product in standard doses. Individuals who are sedentary or consume excessive amounts of the supplement may see weight changes, but this is true for any calorie source. As with any new supplement, it is best to consult with a healthcare professional to ensure it aligns with your specific health needs and goals.

Outbound Link

For further reading on the potential benefits of bovine colostrum in sport and exercise, an informative review can be found on the National Institutes of Health website: The Use of Bovine Colostrum in Sport and Exercise

Frequently Asked Questions

No, taking colostrum supplements as part of a balanced diet and active lifestyle will not make you fat. Colostrum itself is not a high-calorie product, and when combined with exercise, it has been associated with lean muscle gain rather than fat storage.

No, standard doses of colostrum supplements are not high in calories. For example, some powders contain as little as 10-20 calories per serving. The caloric content is minimal and unlikely to cause weight gain unless consumed in excessive amounts.

Colostrum affects body weight by potentially increasing lean body mass, especially when combined with resistance training. It contains growth factors that can support muscle repair and growth, which is a key component of a healthy body composition.

While not a direct weight-loss aid, colostrum may support weight management indirectly. By promoting lean muscle growth and improving gut health, it can contribute to a healthier metabolism, which is beneficial for those managing their weight.

Using excessively high dosages of any supplement increases your caloric intake, which could lead to weight gain if not balanced by diet and exercise. There is minimal research on the effects of low-dose versus high-dose colostrum on weight, but adhering to manufacturer guidelines is generally recommended.

Some individuals may experience mild gastrointestinal discomfort, such as nausea or bloating, particularly when first starting. People with a dairy allergy or lactose intolerance should exercise caution.

Yes, you can take colostrum while trying to lose weight. Its potential benefits for preserving lean muscle mass during caloric restriction and supporting gut health could be advantageous. However, it is not a standalone solution and must be combined with a calorie-controlled diet and exercise.