Safety & Cautions

At 1x Serving (Daily Maintenance)

All 18 ingredients are well within established safety limits for healthy adults aged 18–40. No ingredient approaches its tolerable upper intake level (UL). The botanical actives are within or below their individually studied dose ranges.

At 3x Serving (Intensive Protocol)

No ingredient exceeds its UL when HairBooster is taken in isolation (without additional supplementation). Two micronutrients approach their limits:

Some botanical actives at 3x exceed their individually published study dose ceilings. This does not indicate toxicity, but means the formula enters dose ranges beyond what has been studied in controlled trials. Monitor for unexpected effects and consult a healthcare provider if concerns arise.

Zinc:Copper Ratio

The formula maintains a fixed 7.1:1 zinc-to-copper ratio at all serving levels. This is a deliberate formulation feature: high-dose zinc supplementation without copper can cause secondary copper deficiency, which itself causes hair loss and anaemia. Many supplements include zinc at high doses without any copper. HairBooster pairs them intentionally so that the ratio remains balanced from 1x through 3x.

Biotin and Blood Tests (All Serving Levels)

Biotin (vitamin B7) at supplemental levels can interfere with streptavidin-biotin immunoassay-based blood tests. This is a diagnostic interference issue, not a health risk — your body is fine, but the lab result may be inaccurate.

Tests That May Be Affected

Vitamin D3 Co-Supplementation (3x Serving)

At 3x, vitamin D3 reaches 3,600 IU — 90% of the 4,000 IU adult tolerable upper intake level. The formula alone does not exceed the UL. However, if you take additional vitamin D supplements, consume heavily fortified foods, or take a multivitamin containing D3, the combined total could exceed the safe limit.

Chronic vitamin D excess can lead to hypercalcaemia (elevated blood calcium).

Drug Interactions

If you take any prescription medication, consult your healthcare provider before starting HairBooster. The following interactions have been identified:

Special Populations

Pregnancy — CONTRAINDICATED

• Saw palmetto is a 5-alpha-reductase inhibitor — pharmacologically analogous to finasteride, which carries FDA Pregnancy Category X (known teratogen: genital ambiguity in male foetuses). No human pregnancy safety data exists for saw palmetto.
• Ashwagandha is classified as an abortifacient in traditional Ayurvedic medicine. NCCIH (NIH), the Merck Manual, and RIVM Netherlands all advise against use during pregnancy. No established pregnancy safety profile exists.
• Pumpkin seed extract demonstrates estrogenic and uterotonic activity in animal models. No human pregnancy safety data exists.

Pre-Pregnancy (Trying to Conceive) — DISCONTINUE

Discontinue HairBooster when actively trying to conceive. The anti-androgenic properties of saw palmetto and pumpkin seed could theoretically affect early embryonic development before pregnancy is confirmed (typically weeks 3–8). Ashwagandha's thyroid-modulating effects require stable thyroid function during conception.

Breastfeeding — CONSULT HEALTHCARE PROVIDER

The micronutrient component of HairBooster is safe during lactation. However, the botanical actives (saw palmetto, ashwagandha, pumpkin seed extract) lack breast milk transfer data. Tocotrienols have mild anticoagulant potential relevant during postpartum recovery.

If you are breastfeeding and wish to use HairBooster for postpartum hair shedding, discuss with your healthcare provider and monitor infant health.

Under 18 — NOT RECOMMENDED

HairBooster is formulated for adults ages 18 and over.

• Adolescent tolerable upper intake levels (ULs) are lower than adult ULs. Niacinamide at 3x exceeds the UL for ages 9–13 and reaches the UL boundary for ages 14–18.
• No paediatric safety data exists for saw palmetto, ashwagandha, or pumpkin seed extract.
• A case report documents endocrine disruption (hot flashes and early menarche) in a 10-year-old using saw palmetto.

Autoimmune Conditions — USE WITH CAUTION

Ashwagandha has immunostimulatory properties (Th1/Th2 balance modulation). Use with caution if you have Hashimoto's thyroiditis, lupus, rheumatoid arthritis, or other autoimmune conditions. Consult your healthcare provider before starting.

Thyroid Disorders — CONSULT ENDOCRINOLOGIST

Ashwagandha may elevate thyroid hormone levels. Documented case reports of thyroid hormone changes exist. If you have a history of thyroid conditions (hypothyroidism, hyperthyroidism, Hashimoto's, Graves' disease), consult your endocrinologist before use.

This is particularly relevant for women over 30, where thyroid disorder prevalence increases sharply, and during the postpartum period (postpartum thyroiditis affects 5–10% of women).

Iron Deficiency Advisory

HairBooster does not contain iron. This is an intentional omission — iron has a strong metallic taste that cannot be masked in gummy form, causes oxidative degradation of other ingredients during shelf life, and has a narrow therapeutic window where excess causes harm.

However, iron deficiency is the single most common nutritional cause of hair shedding (telogen effluvium), particularly in premenopausal women, those with heavy menstrual periods, vegetarians/vegans, and during pregnancy.

HairBooster does include vitamin C, which enhances non-haeme iron absorption 2–3x from dietary sources when taken with iron-rich meals — providing indirect support.

Niacinamide at 3x Serving

At 3x, niacinamide reaches 86% of the supplemental UL (35 mg for adults). This approaches but does not exceed the limit.

Context: The 35 mg UL is set based on the flushing threshold of supplemental niacin. Niacinamide (the form used in HairBooster) causes substantially less flushing than nicotinic acid. Hepatotoxicity from niacin is associated with doses exceeding 500 mg/day — far above the 3x level. Practical risk at the formula dose is minimal for adults.

HairBooster is designed for the three most common non-medical causes of hair loss: DHT-driven pattern thinning, stress-related shedding, and nutritional deficiency. If your hair loss falls outside these categories, a medical evaluation should come first.

See a dermatologist or physician if you experience:

• Sudden onset hair loss (not gradual)
• Patchy or localised bald spots (may indicate alopecia areata)
• Scalp pain, scarring, redness, or visible inflammation
• Hair loss that started after beginning a new medication
• Symptoms suggesting thyroid disorder (fatigue, weight changes, temperature sensitivity)
• Suspected autoimmune condition
• Advanced baldness where follicles have been fully miniaturised for years — no supplement (and most drugs) can reverse this

Tier 1 — Mandatory (P0)

Tier 2 — Recommended (P1)