Evidence supporting the use of: Vitamin D
For the health condition: Muscle Tone (lack of)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Vitamin D is scientifically recognized for its role in muscle function and tone. Deficiency in vitamin D has been associated with muscle weakness, especially in the proximal muscles (those closest to the body’s center). The active form of vitamin D (calcitriol) binds to vitamin D receptors present in muscle tissue, influencing muscle protein synthesis and calcium handling, which are both critical for muscle contraction and tone. Clinical studies have demonstrated that individuals with low vitamin D levels, such as the elderly or those with limited sun exposure, are at increased risk of muscle weakness, falls, and impaired balance. Randomized controlled trials have shown that vitamin D supplementation can improve muscle strength and physical performance in deficient populations, though the effect size is generally modest and most pronounced in those with baseline deficiency. However, for individuals with normal vitamin D status, supplementation does not appear to provide additional benefit for muscle tone. There is less evidence supporting its use for treating severe muscle tone disorders (e.g., spasticity from neurological conditions), but it is justified as a preventive or adjunctive strategy for age- or deficiency-related muscle weakness. In summary, vitamin D’s use for supporting muscle tone is scientifically validated, particularly in cases of deficiency, but it is not a universal treatment for all forms of muscle tone loss.

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Other health conditions supported by vitamin D

Acne
Allergies (food)
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Alzheimer's Disease
Amenorrhea
Anemia
Anorexia
Apathy
Arrhythmia
Arteriosclerosis
Arthritis
Asthma
Autism
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Backache
Birth Defects (prevention)
Body Building
Broken Bones
Calcium Deficiency
Cancer (natural therapy for)
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Cancer Treatment (reducing side effects)
Cardiovascular Disease
Celiac Disease
Chronic Obstructive Pulmonary Disorder
Colds (antiviral)
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Concentration (poor)
Concussions
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Congestive Heart Failure
Contagious Diseases
Convalescence
Convulsions
Cramps (menstrual)
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Crohn's Disease
Cystic Breast Disease
Cystic Fibrosis
Dandruff
Debility
Dementia
Depression
Dermatitis
Diabetes
Diabetic Retinopathy
Erectile Dysfunction
Estrogen (low)
Fatigue
Fibroids (uterine)
Fibromyalgia Syndrome
Fibrosis
Grave's Disease
Grief and Sadness
Hair (loss or thinning)
Hair Care (general)
Hashimoto's Disease
Headache (cluster)
Heart (weakness)
Hypertension
Hypothyroid
Infection
Infection (bacterial)
Infection (viral)
Infertility
Inflammation
Inflammatory Bowel Disorders
Influenza
Injuries
Irritable Bowel Syndrome
Itching
Knees (weak)
Leaky Gut Syndrome
Leprosy
Lesions
Leukemia
Lou Gehrig's Disease
Lupus
Lymphoma
Melanoma
Memory and Brain Function
Menopause
Menstrual Irregularity
Mental Illness
Metabolic Syndrome
Migraine
Miscarriage (prevention)
Mood Swings
Multiple Sclerosis
Muscle Tone (lack of)
Muscular Dystrophy
Myasthenia Gravis
Nephritis
Nerve Damage
Nervous Exhaustion
Numbness
Nursing
Obsessive Compulsive Disorder
Oral Surgery
Osteoporosis
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PMS (general)
PMS Type D
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Pneumonia
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Post Partum Depression
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Pregnancy (herbs and supplements for)
Progesterone (low)
Prostatitis
Psoriasis
Rheumatoid Arthritis
Schizophrenia
Sciatica
Seasonal Affective Disorder
Senility
Tuberculosis