Vitex (Chasteberry) 400mg

Name: Nature's Way Vitex (Chasteberry) 400mg
Brand: Nature's Way
Price: 11.99 USD
Availability: InStock

The most studied herbal supplement for PMS and cycle regulation. Vitex agnus-castus has moderate evidence for reducing PMS symptoms (breast tenderness, mood, bloating) and may help with luteal phase defects. The evidence is better than most hormonal supplements but still limited by small study sizes.

62/ 100

Biorank Score

Independently ranked

62/ 100

Biorank Score

Independently ranked by Biorank Laboratories

Our Verdict

Solid Choice

Vitex earns the highest score in the hormonal balance category because it has the most clinical evidence, including a systematic review, multiple RCTs, and German Commission E approval. The evidence is moderate but real, unlike most hormonal supplements. Minor hype penalty for 'hormone balancing' claims that oversimplify the mechanism. The product is affordable and has a reasonable safety profile. Best used for PMS rather than broad 'hormonal health.'

Key Findings

Strongest evidence among herbal PMS supplements (systematic review, multiple RCTs)
German Commission E approved for PMS and menstrual irregularity
Works via dopaminergic effects on pituitary -- reduces prolactin, supports progesterone
Takes 2-3 menstrual cycles to assess benefit -- not immediate relief

Evidence Analysis

Vitex agnus-castus (chasteberry) has the strongest evidence base among herbal supplements for premenstrual syndrome (PMS). A systematic review (van Die 2013) found moderate evidence supporting efficacy for PMS symptom reduction. The BNO 1095 extract was studied in an RCT (Ma 2010, n=217) showing significant PMS symptom improvement versus placebo. A Cochrane review notes the evidence is suggestive but limited by study quality. Vitex is thought to work via dopaminergic effects on the pituitary, reducing prolactin and supporting progesterone production. German Commission E approved vitex for PMS and cycle irregularity.

Ingredient Breakdown

Ingredient	Dose	Effective Dose	Adequacy	Verdict
Vitex Agnus-Castus (Chasteberry) Extract	400mg	4-40mg extract or 400-1800mg dried berry		Adequate

True Cost Analysis

Properly Dosed -- What You Pay Is What You Get

Listed Price

$0.12/serving

$3.60/month at 1 serving/day

True Cost Per Effective Dose

$0.12/effective dose

$3.60/month for effective dosing

Value Score

Excellent value

Where It Falls Short

Clinical trials are mostly small and of moderate quality. Takes 2-3 cycles to assess benefit. Should not be used during pregnancy or with hormonal medications (oral contraceptives, HRT). The 'hormone balancing' narrative oversimplifies complex endocrinology. Not a substitute for medical evaluation of irregular cycles. Mechanism of action is not fully understood.