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Doctor's Best Fully Active B Complex
SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7.3
USERS' SCORE
Medium or Average
Based on 10 Reviews
6.8
Supplement Facts
Serving Size:  1 Veggie Capsule
Amount Per Serving
%DV
Vitamin C (as ascorbic acid)
40 mg
44%
Thiamin (as thiamin HCl)
60 mg
5000%
Riboflavin (as riboflavin and riboflavin-5-phosphate)
75 mg
5769%
Niacin (as niacinamide and niacin)
50 mg
313%
Vitamin B6 (from pyridoxine HCl and pyridoxal-5-phosphate)
50 mg
2941%
Folate (as (6S)-5-methyltetrahydrofolic acid, glucosamine salt) (Quatrefolic®)
400 mcg DFE
100%
Vitamin B12 (as methylcobalamin)
1000 mcg
41677%
Biotin
600 mcg
2000%
Pantothenic Acid (as d-calcium pantothenate)
100 mg
2000%

Top Medical Research Studies

9.5
Vitamin B complex effective for cramps
Randomized, double-blind, placebo-controlled study of the safety and efficacy of vitamin B complex in the treatment of nocturnal leg cramps in elderly patients with hypertension.
Medium relevance score
We conducted a randomized, double-blind study to see if vitamin B complex could help older adults with nighttime leg cramps. Over three months, participants reported their cramp frequency and intensity.

The results were encouraging—86% of those taking vitamin B complex saw significant improvement, while the placebo group showed no notable changes. This suggests that vitamin B complex is a promising and safe alternative to traditional treatments like quinine, which can have unpleasant side effects.
Read More
5
Limited evidence for vitamin B effectiveness
Interventions for leg cramps in pregnancy.
Low certainty in treatment efficacy
We explored various treatments for leg cramps during pregnancy, including vitamin B complex. In our findings, oral vitamin B appeared to reduce the frequency and intensity of leg cramps in a small study involving 42 women.

However, the overall evidence was inconsistent and of low to very-low certainty due to design limitations and the small size of trials. Consequently, it's challenging to determine the real effectiveness and safety of vitamin B and other interventions for this common issue.
Read More

Most Useful Reviews

9.5
Increased energy
The best blend of B vitamins I've tried! The bottle size is good, and I feel a boost in energy when I take them. They also helped with nerve pain in my legs when paired with Benfotiamine. I'm very satisfied and will continue purchasing from IHerb!
Read More
8.8
Relieved leg cramps
I bought this for my father-in-law, who suffered from muscle cramps. Since taking it, he's greatly improved and has more energy. I recommend taking it every two days as the dosage is quite high. Good quality!
Read More
7.5
Less cramps
After experiencing leg cramps, my doctor advised me to increase my B vitamin intake. After a month of use, I've noticed a significant improvement.
Read More

Medical Researches

SCIENTIFIC SCORE
Possibly Effective
Based on 2 Researches
7.3
  • All Researches
9.5
Vitamin B complex effective for cramps
Randomized, double-blind, placebo-controlled study of the safety and efficacy of vitamin B complex in the treatment of nocturnal leg cramps in elderly patients with hypertension.
Medium relevance score
We conducted a randomized, double-blind study to see if vitamin B complex could help older adults with nighttime leg cramps. Over three months, participants reported their cramp frequency and intensity.

The results were encouraging—86% of those taking vitamin B complex saw significant improvement, while the placebo group showed no notable changes. This suggests that vitamin B complex is a promising and safe alternative to traditional treatments like quinine, which can have unpleasant side effects.
Read More
5
Limited evidence for vitamin B effectiveness
Interventions for leg cramps in pregnancy.
Low certainty in treatment efficacy
We explored various treatments for leg cramps during pregnancy, including vitamin B complex. In our findings, oral vitamin B appeared to reduce the frequency and intensity of leg cramps in a small study involving 42 women.

However, the overall evidence was inconsistent and of low to very-low certainty due to design limitations and the small size of trials. Consequently, it's challenging to determine the real effectiveness and safety of vitamin B and other interventions for this common issue.
Read More

User Reviews

USERS' SCORE
Medium or Average
Based on 10 Reviews
6.8
  • All Reviews
  • Positive Reviews
  • Negative Reviews
9.5
Increased energy
The best blend of B vitamins I've tried! The bottle size is good, and I feel a boost in energy when I take them. They also helped with nerve pain in my legs when paired with Benfotiamine. I'm very satisfied and will continue purchasing from IHerb!
8.8
Relieved leg cramps
I bought this for my father-in-law, who suffered from muscle cramps. Since taking it, he's greatly improved and has more energy. I recommend taking it every two days as the dosage is quite high. Good quality!
7.5
Less cramps
After experiencing leg cramps, my doctor advised me to increase my B vitamin intake. After a month of use, I've noticed a significant improvement.
3.5
Not effective
I switched from another brand but haven't felt the benefits with this one. It doesn’t help with leg cramps like my previous choice did. The quality appears ordinary, and I might not repurchase.
3
Allergy risks
The dosage is very high, and I experienced allergies even though I'm not typically allergic. I take one capsule daily after breakfast, but I suggest caution due to potential high doses.
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