Supplement Type
KEEPER
The Keeper— Still moving at 60.
"Longevity is the ultimate flex."
Anchored in anti-ageing, hormone health, and long-term performance. After 40, preserving strength, supporting testosterone, and reducing inflammation become the priority. Vitamin D, omega-3, magnesium, zinc, and ashwagandha build the foundation that doesn't fade.
Take the free quizSignature Stack
The 4 essentials for KEEPER
The four supplements to start with for the The Keeper. Monthly cost runs around ¥3,800. A personalised stack takes three minutes to generate.
Vitamin D3
2,000〜5,000 IU / 日
骨や免疫、テストステロン合成に関わる重要な栄養素です。日照時間や食事の関係で、日本人の多くが不足している傾向があります。血中濃度を検査してから摂取量を決めるのが…
¥400/ mo
Fish Oil (Omega-3 EPA/DHA)
EPA + DHA 合計 1,500〜3,000mg / 日
EPA と DHA を含むオメガ3脂肪酸は、炎症のコントロールや心血管、脳機能を支えます。EPA + DHA の合計で 2g / 日以上を目安に摂ると効果を感じ…
¥1,800/ mo
Magnesium Glycinate
200〜400mg / 日
筋弛緩や睡眠の質、ストレス応答に関わる必須ミネラルです。吸収が良いグリシン酸塩を選ぶと、クエン酸型にありがちな下痢のリスクを避けられます。…
¥1,200/ mo
Zinc
15〜30mg / 日
テストステロン合成や免疫、傷の治癒に深く関わります。男性は汗からの喪失もあって不足しやすく、銅とのバランスを意識する必要があります。…
¥400/ mo
Who this type is for
Are you a KEEPER?
Anchored in anti-ageing, hormone health, and long-term performance. After 40, preserving strength, supporting testosterone, and reducing inflammation become the priority. Vitamin D, omega-3, magnesium, zinc, and ashwagandha build the foundation that doesn't fade.
The Forgestack quiz runs through 15 questions covering gender, goals, body composition, budget, sleep, and stress — and generates a science-backed stack tuned to you. If you're typed as KEEPER, the signature stack above expands into Essentials and Boosters customised to your budget and lifestyle.
Three minutes. No signup. Answers live only in your browser.
FAQ
Frequently asked questions
Top priority supplements in your 40s+?+
Four anchors: vitamin D (keep 25(OH)D >30 ng/mL), omega-3 (inflammation), magnesium (sleep & muscle function), zinc (testosterone). Stack creatine on top for strong sarcopenia defence.
Supplements that help maintain testosterone?+
Zinc (restores levels if deficient), ashwagandha (KSM-66 600mg/day for 8 weeks shows improvements), and adequate vitamin D. Important: these fix deficiencies — they don't push normal levels higher.
Is creatine especially valuable for middle-aged adults?+
Yes. The Forbes 2021 review shows that 3g/day combined with resistance training helps preserve or improve age-related muscle and strength decline. Long-term safety in healthy adults is established.