Do BCAA supplements have side effects?
Sophia Carter
Updated on April 01, 2026
Do BCAA supplements have side effects?
When taken up to 6 months, oral supplements of BCAAs have not often been linked with harmful side effects. However, side effects may include: Nausea. Pain.
Does BCAA make you gain weight?
Excessive consumption of branched-chain amino acids (BCAAs) may reduce lifespan, negatively impact mood and lead to weight gain, according to new Australian research on mice.
Are BCAAs safe to take everyday?
Research has shown supplemental BCAA intake to be safe for healthy adults in doses of 4-20 g per day, with prolonged intake one week or more showing greater benefits than acute (short term) intake.
Why you should not take BCAA?
In addition to the effects on mood, the excess consumption of BCAA supplements may be linked to an increased susceptibility to cardiovascular disease. Research has shown that the metabolism of amino acids is potentially involved in the development of heart disease.
Is BCAA bad for kidneys?
The BCAAs rapidly interfered with renal function, decreasing GFR and stimulating kidney fibrosis, thus increasing CKD progression, presumably via their effect on energy metabolism.
Does BCAA burn belly fat?
If you’re attempting to lose weight, BCAAs may help your body get rid of unwanted fat more effectively. Competitive wrestlers consuming a high protein, calorie-restricted diet supplemented with BCAAs lost 3.5 more pounds (1.6 kg) than those given a soy protein supplement over a 19-day study period ( 37 ).
Is BCAA good for weight loss?
Does BCAA affect liver?
Together, these clinical studies strongly suggest BCAA intake may have negative impact upon liver structure/function, particularly in obesity. Mechanisms responsible for this quandary (how BCAA induces weight-loss but damages the liver) remain unknown.
Can BCAA cause sleeplessness?
These disparate results suggest that BCAA metabolism has multiple interrelationships with the sleep/wake system and that insomnia may be associated with BCAA dysregulation.
How long does it take to see results from taking BCAA?
It takes about 10 days of supplementing with BCAAs to see results. You probably need to split your dosage. Take half before exercise and half after. This ensures enough available BCAAs for protein synthesis for building muscle and enough to repair muscle damage post-workout.